Hi Dears
I  have got following results:" for open boundary condition"
SWEEP=8, MAXSTATES=400, L=200, E0= -0.44220777784
SWEEP=50, MAXSTATES=500, L=200, E0= -0.4422077778446504
SWEEP=8, MAXSTATES=150, L=600, E0= -0.442833001737
SWEEP=8, MAXSTATES= 500, L=600, E0=- 0.44283300822
SWEEP=8, MAXSTATES= 150, L=700, E0= -0.442877

We see that the result still have not got to -0.443147.maybe we increase the size ,getting to this energy but it takes a lot of time . for periodic boundary condition the energy that achieved is lower.
I have a question. Are there some techniques for use of this algorithm such that, for example, for 100 or 200 sites we get to the desire energy?



On Sun, Dec 7, 2008 at 6:00 AM, <comp-phys-alps-users-request@phys.ethz.ch> wrote:
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Today's Topics:

  1. DMRG For Antiferromagnetic spin one half chain (zhian asadzadeh)
  2. Re: DMRG For Antiferromagnetic spin one half chain
     (Matthias Troyer)
  3. Re: DMRG For Antiferromagnetic spin one half chain
     (Adrian E. Feiguin)


----------------------------------------------------------------------

Message: 1
Date: Sat, 6 Dec 2008 07:58:46 -0500
From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com>
Subject: [ALPS-users] DMRG For Antiferromagnetic spin one half chain
To: comp-phys-alps-users@phys.ethz.ch
Message-ID:
       <89e5d6760812060458j27784855jaf87d27a63e2b4c1@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hi Dears
Thanks a  lot. I have achieved the ground state energy  as follow:
SWEEP=8, L=30,MAXSTATES=100, E0= -0.437045191.
SWEEP=8, L=50,MAXSTATES=140, E0= -0.43944220.
SWEEP=4, L=100,MAXSTATES=100, E0= -0.44127739.
SWEEP=4, L=100,MAXSTATES=300, E0= -0.44127739.
SWEEP=4, L=300,MAXSTATES=100, E0= -0.44127739.
The E0= -0.44127739 is the best enegy that i achieve and when i change the
sweep&M&L,the energy doesn't change.I can't improve the result ,also i wrote
the model & lattice, but have not changed any thing.
Thanks.





On Fri, Dec 5, 2008 at 6:00 AM,
<comp-phys-alps-users-request@phys.ethz.ch>wrote:

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>
> Today's Topics:
>
>   1. DMRG For Antiferromagnetic Spin one half chain (zhian asadzadeh)
>   2. Re: DMRG For Antiferromagnetic Spin one half chain
>      (Matthias Troyer)
>   3. Re: DMRG For Antiferromagnetic Spin one half chain
>      (Adrian E. Feiguin)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 4 Dec 2008 22:35:51 +0330
> From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com>
> Subject: [ALPS-users] DMRG For Antiferromagnetic Spin one half chain
> To: comp-phys-alps-users@phys.ethz.ch
> Message-ID:
>        <89e5d6760812041105w5556998du756af1c79c8fb32b@mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Dear
> Thanks for your consideration.I run the program for different sizes and
> have
> increased it to 500 sites.For up to 100 site the result converges but it is
> not the result that should it be (*0.443147*),the result  that have
> achieved
> earlier from Bethe method and in the work of Mr.white that tests the DMRG
> for showing the powerful of this code.
> Thanks
> zhian
>
>
> On Wed, Dec 3, 2008 at 2:30 PM,
> <comp-phys-alps-users-request@phys.ethz.ch>wrote:
>
> > Send Comp-phys-alps-users mailing list submissions to
> >        comp-phys-alps-users@phys.ethz.ch
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> >
> https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
> > or, via email, send a message with subject or body 'help' to
> >        comp-phys-alps-users-request@phys.ethz.ch
> >
> > You can reach the person managing the list at
> >        comp-phys-alps-users-owner@phys.ethz.ch
> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of Comp-phys-alps-users digest..."
> >
> >
> > Today's Topics:
> >
> >   1. DMRG for antiferromagnetic spin one half chain (zhian asadzadeh)
> >   2. Re: DMRG for antiferromagnetic spin one half chain
> >      (Matthias Troyer)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Tue, 2 Dec 2008 16:43:12 +0330
> > From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com>
> > Subject: [ALPS-users] DMRG for antiferromagnetic spin one half chain
> > To: comp-phys-alps-users@phys.ethz.ch
> > Message-ID:
> >        <89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hi ADRIAN
> > I run DMRG program for  antiferromagnetic S=1/2 chain,but the result that
> i
> > achieve for groun state energy  doesn't concur with the result  that has
> > achieved from bethe ansats method (0.443147).
> > I have changed m&sweep& number of sites(to 1000 site) but my result just
> 2
> > digit concur with 0.443147.
> > I don't know what must i do.
> > I will be very appreciate  if you can guide me.
> >
> > Thanks
> > zhian
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL:
> >
> https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081202/0493cedb/attachment-0001.htm
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Tue, 2 Dec 2008 08:33:57 -0500
> > From: Matthias Troyer <troyer@phys.ethz.ch>
> > Subject: Re: [ALPS-users] DMRG for antiferromagnetic spin one half
> >        chain
> > To: comp-phys-alps-users@phys.ethz.ch
> > Message-ID: <67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>
> > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
> >
> > What is the system size? There are finite size corrections. As you
> > increase the size it should converge
> >
> > Matthias
> >
> > On Dec 2, 2008, at 8:13 AM, zhian asadzadeh wrote:
> >
> > > Hi ADRIAN
> > > I run DMRG program for  antiferromagnetic S=1/2 chain,but the result
> > > that i achieve for groun state energy  doesn't concur with the
> > > result  that has achieved from bethe ansats method (0.443147).
> > > I have changed m&sweep& number of sites(to 1000 site) but my result
> > > just 2 digit concur with 0.443147.
> > > I don't know what must i do.
> > > I will be very appreciate  if you can guide me.
> > >
> > > Thanks
> > > zhian
> >
> >
> >
> > End of Comp-phys-alps-users Digest, Vol 33, Issue 1
> > ***************************************************
> >
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081204/30386c67/attachment-0001.htm
>
> ------------------------------
>
> Message: 2
> Date: Thu, 4 Dec 2008 22:29:05 +0100
> From: Matthias Troyer <troyer@phys.ethz.ch>
> Subject: Re: [ALPS-users] DMRG For Antiferromagnetic Spin one half
>        chain
> To: comp-phys-alps-users@phys.ethz.ch
> Message-ID: <F91F718B-C18F-432C-90CA-5A52B0C0841F@phys.ethz.ch>
> Content-Type: text/plain; charset="us-ascii"
>
> How many states do you keep?
>
> On Dec 4, 2008, at 8:05 PM, zhian asadzadeh wrote:
>
> > Hi Dear
> > Thanks for your consideration.I run the program for different sizes
> > and have increased it to 500 sites.For up to 100 site the result
> > converges but it is  not the result that should it be (0.443147),the
> > result  that have achieved earlier from Bethe method and in the work
> > of Mr.white that tests the DMRG for showing the powerful of this code.
> > Thanks
> > zhian
> >
> >
> > On Wed, Dec 3, 2008 at 2:30 PM, <
> comp-phys-alps-users-request@phys.ethz.ch
> > > wrote:
> > Send Comp-phys-alps-users mailing list submissions to
> >        comp-phys-alps-users@phys.ethz.ch
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> >
> https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
> > or, via email, send a message with subject or body 'help' to
> >        comp-phys-alps-users-request@phys.ethz.ch
> >
> > You can reach the person managing the list at
> >        comp-phys-alps-users-owner@phys.ethz.ch
> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of Comp-phys-alps-users digest..."
> >
> >
> > Today's Topics:
> >
> >   1. DMRG for antiferromagnetic spin one half chain (zhian asadzadeh)
> >   2. Re: DMRG for antiferromagnetic spin one half chain
> >      (Matthias Troyer)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Tue, 2 Dec 2008 16:43:12 +0330
> > From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com>
> > Subject: [ALPS-users] DMRG for antiferromagnetic spin one half chain
> > To: comp-phys-alps-users@phys.ethz.ch
> > Message-ID:
> >        <89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hi ADRIAN
> > I run DMRG program for  antiferromagnetic S=1/2 chain,but the result
> > that i
> > achieve for groun state energy  doesn't concur with the result  that
> > has
> > achieved from bethe ansats method (0.443147).
> > I have changed m&sweep& number of sites(to 1000 site) but my result
> > just 2
> > digit concur with 0.443147.
> > I don't know what must i do.
> > I will be very appreciate  if you can guide me.
> >
> > Thanks
> > zhian
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL:
> https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081202/0493cedb/attachment-0001.htm
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Tue, 2 Dec 2008 08:33:57 -0500
> > From: Matthias Troyer <troyer@phys.ethz.ch>
> > Subject: Re: [ALPS-users] DMRG for antiferromagnetic spin one half
> >        chain
> > To: comp-phys-alps-users@phys.ethz.ch
> > Message-ID: <67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>
> > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
> >
> > What is the system size? There are finite size corrections. As you
> > increase the size it should converge
> >
> > Matthias
> >
> > On Dec 2, 2008, at 8:13 AM, zhian asadzadeh wrote:
> >
> > > Hi ADRIAN
> > > I run DMRG program for  antiferromagnetic S=1/2 chain,but the result
> > > that i achieve for groun state energy  doesn't concur with the
> > > result  that has achieved from bethe ansats method (0.443147).
> > > I have changed m&sweep& number of sites(to 1000 site) but my result
> > > just 2 digit concur with 0.443147.
> > > I don't know what must i do.
> > > I will be very appreciate  if you can guide me.
> > >
> > > Thanks
> > > zhian
> >
> >
> >
> > End of Comp-phys-alps-users Digest, Vol 33, Issue 1
> > ***************************************************
> >
>
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL:
> https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081204/be06f615/attachment-0001.htm
>
> ------------------------------
>
> Message: 3
> Date: Thu, 04 Dec 2008 14:32:09 -0800
> From: "Adrian E. Feiguin" <afeiguin@kitp.ucsb.edu>
> Subject: Re: [ALPS-users] DMRG For Antiferromagnetic Spin one half
>        chain
> To: comp-phys-alps-users@phys.ethz.ch
> Message-ID: <49385A69.90908@kitp.ucsb.edu>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi all,
>
> Sorry for the radio silence, but I've been travelling.
> As Matthais said, it would be useful if you could send us some numbers,
> for different sizes, and number of DMRG states.
>
> Saludos,
> <ADRIAN>
>
> Matthias Troyer wrote:
>
> > How many states do you keep?
> >
> > On Dec 4, 2008, at 8:05 PM, zhian asadzadeh wrote:
> >
> >> Hi Dear
> >> Thanks for your consideration.I run the program for different sizes
> >> and have increased it to 500 sites.For up to 100 site the result
> >> converges but it is  not the result that should it be
> >> (*0.443147*),the result  that have achieved earlier from Bethe method
> >> and in the work of Mr.white that tests the DMRG for showing the
> >> powerful of this code.
> >> Thanks
> >> zhian
> >>
> >>
> >> On Wed, Dec 3, 2008 at 2:30 PM,
> >> <comp-phys-alps-users-request@phys.ethz.ch
> >> <mailto:comp-phys-alps-users-request@phys.ethz.ch>> wrote:
> >>
> >>     Send Comp-phys-alps-users mailing list submissions to
> >>            comp-phys-alps-users@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users@phys.ethz.ch>
> >>
> >>     To subscribe or unsubscribe via the World Wide Web, visit
> >>
> >>      https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
> >>     or, via email, send a message with subject or body 'help' to
> >>            comp-phys-alps-users-request@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>
> >>
> >>     You can reach the person managing the list at
> >>            comp-phys-alps-users-owner@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users-owner@phys.ethz.ch>
> >>
> >>     When replying, please edit your Subject line so it is more specific
> >>     than "Re: Contents of Comp-phys-alps-users digest..."
> >>
> >>
> >>     Today's Topics:
> >>
> >>       1. DMRG for antiferromagnetic spin one half chain (zhian
> asadzadeh)
> >>       2. Re: DMRG for antiferromagnetic spin one half chain
> >>          (Matthias Troyer)
> >>
> >>
> >>
> ----------------------------------------------------------------------
> >>
> >>     Message: 1
> >>     Date: Tue, 2 Dec 2008 16:43:12 +0330
> >>     From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com
> >>     <mailto:zhian.asadzadeh@gmail.com>>
> >>     Subject: [ALPS-users] DMRG for antiferromagnetic spin one half chain
> >>     To: comp-phys-alps-users@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users@phys.ethz.ch>
> >>     Message-ID:
> >>
> >>      <89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com
> >>     <mailto:89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com
> >>
> >>     Content-Type: text/plain; charset="iso-8859-1"
> >>
> >>     Hi ADRIAN
> >>     I run DMRG program for  antiferromagnetic S=1/2 chain,but the
> >>     result that i
> >>     achieve for groun state energy  doesn't concur with the result
> >>      that has
> >>     achieved from bethe ansats method (0.443147).
> >>     I have changed m&sweep& number of sites(to 1000 site) but my
> >>     result just 2
> >>     digit concur with 0.443147.
> >>     I don't know what must i do.
> >>     I will be very appreciate  if you can guide me.
> >>
> >>     Thanks
> >>     zhian
> >>     -------------- next part --------------
> >>     An HTML attachment was scrubbed...
> >>     URL:
> >>
> https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081202/0493cedb/attachment-0001.htm
> >>
> >>     ------------------------------
> >>
> >>     Message: 2
> >>     Date: Tue, 2 Dec 2008 08:33:57 -0500
> >>     From: Matthias Troyer <troyer@phys.ethz.ch
> >>     <mailto:troyer@phys.ethz.ch>>
> >>     Subject: Re: [ALPS-users] DMRG for antiferromagnetic spin one half
> >>            chain
> >>     To: comp-phys-alps-users@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users@phys.ethz.ch>
> >>     Message-ID: <67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch
> >>     <mailto:67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>>
> >>     Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
> >>
> >>     What is the system size? There are finite size corrections. As you
> >>     increase the size it should converge
> >>
> >>     Matthias
> >>
> >>     On Dec 2, 2008, at 8:13 AM, zhian asadzadeh wrote:
> >>
> >>     > Hi ADRIAN
> >>     > I run DMRG program for  antiferromagnetic S=1/2 chain,but the
> >>     result
> >>     > that i achieve for groun state energy  doesn't concur with the
> >>     > result  that has achieved from bethe ansats method (0.443147).
> >>     > I have changed m&sweep& number of sites(to 1000 site) but my
> result
> >>     > just 2 digit concur with 0.443147.
> >>     > I don't know what must i do.
> >>     > I will be very appreciate  if you can guide me.
> >>     >
> >>     > Thanks
> >>     > zhian
> >>
> >>
> >>
> >>     End of Comp-phys-alps-users Digest, Vol 33, Issue 1
> >>     ***************************************************
> >>
> >>
> >
>
>
>
> End of Comp-phys-alps-users Digest, Vol 33, Issue 3
> ***************************************************
>
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------------------------------

Message: 2
Date: Sat, 6 Dec 2008 15:00:19 +0100
From: Matthias Troyer <troyer@phys.ethz.ch>
Subject: Re: [ALPS-users] DMRG For Antiferromagnetic spin one half
       chain
To: comp-phys-alps-users@phys.ethz.ch
Message-ID: <73D50F19-17F0-4F20-A75A-64F4832E0B6C@phys.ethz.ch>
Content-Type: text/plain; charset="us-ascii"

4 sweeps seems far too little to me. Can you try with 50. Adrian, what
would you recommend?

Matthias

On 6 Dec 2008, at 13:58, zhian asadzadeh wrote:

> Hi Dears
> Thanks a  lot. I have achieved the ground state energy  as follow:
> SWEEP=8, L=30,MAXSTATES=100, E0= -0.437045191.
> SWEEP=8, L=50,MAXSTATES=140, E0= -0.43944220.
> SWEEP=4, L=100,MAXSTATES=100, E0= -0.44127739.
> SWEEP=4, L=100,MAXSTATES=300, E0= -0.44127739.
> SWEEP=4, L=300,MAXSTATES=100, E0= -0.44127739.
> The E0= -0.44127739 is the best enegy that i achieve and when i
> change the sweep&M&L,the energy doesn't change.I can't improve the
> result ,also i wrote the model & lattice, but have not changed any
> thing.
> Thanks.
>
>
>
>
>
> On Fri, Dec 5, 2008 at 6:00 AM, <comp-phys-alps-users-request@phys.ethz.ch
> > wrote:
> Send Comp-phys-alps-users mailing list submissions to
>        comp-phys-alps-users@phys.ethz.ch
>
> To subscribe or unsubscribe via the World Wide Web, visit
>        https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
> or, via email, send a message with subject or body 'help' to
>        comp-phys-alps-users-request@phys.ethz.ch
>
> You can reach the person managing the list at
>        comp-phys-alps-users-owner@phys.ethz.ch
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Comp-phys-alps-users digest..."
>
>
> Today's Topics:
>
>   1. DMRG For Antiferromagnetic Spin one half chain (zhian asadzadeh)
>   2. Re: DMRG For Antiferromagnetic Spin one half chain
>      (Matthias Troyer)
>   3. Re: DMRG For Antiferromagnetic Spin one half chain
>      (Adrian E. Feiguin)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 4 Dec 2008 22:35:51 +0330
> From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com>
> Subject: [ALPS-users] DMRG For Antiferromagnetic Spin one half chain
> To: comp-phys-alps-users@phys.ethz.ch
> Message-ID:
>        <89e5d6760812041105w5556998du756af1c79c8fb32b@mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Dear
> Thanks for your consideration.I run the program for different sizes
> and have
> increased it to 500 sites.For up to 100 site the result converges
> but it is
> not the result that should it be (*0.443147*),the result  that have
> achieved
> earlier from Bethe method and in the work of Mr.white that tests the
> DMRG
> for showing the powerful of this code.
> Thanks
> zhian
>
>
> On Wed, Dec 3, 2008 at 2:30 PM,
> <comp-phys-alps-users-request@phys.ethz.ch>wrote:
>
> > Send Comp-phys-alps-users mailing list submissions to
> >        comp-phys-alps-users@phys.ethz.ch
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> >        https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
> > or, via email, send a message with subject or body 'help' to
> >        comp-phys-alps-users-request@phys.ethz.ch
> >
> > You can reach the person managing the list at
> >        comp-phys-alps-users-owner@phys.ethz.ch
> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of Comp-phys-alps-users digest..."
> >
> >
> > Today's Topics:
> >
> >   1. DMRG for antiferromagnetic spin one half chain (zhian
> asadzadeh)
> >   2. Re: DMRG for antiferromagnetic spin one half chain
> >      (Matthias Troyer)
> >
> >
> >
> ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Tue, 2 Dec 2008 16:43:12 +0330
> > From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com>
> > Subject: [ALPS-users] DMRG for antiferromagnetic spin one half chain
> > To: comp-phys-alps-users@phys.ethz.ch
> > Message-ID:
> >        <89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hi ADRIAN
> > I run DMRG program for  antiferromagnetic S=1/2 chain,but the
> result that i
> > achieve for groun state energy  doesn't concur with the result
> that has
> > achieved from bethe ansats method (0.443147).
> > I have changed m&sweep& number of sites(to 1000 site) but my
> result just 2
> > digit concur with 0.443147.
> > I don't know what must i do.
> > I will be very appreciate  if you can guide me.
> >
> > Thanks
> > zhian
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL:
> > https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081202/0493cedb/attachment-0001.htm
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Tue, 2 Dec 2008 08:33:57 -0500
> > From: Matthias Troyer <troyer@phys.ethz.ch>
> > Subject: Re: [ALPS-users] DMRG for antiferromagnetic spin one half
> >        chain
> > To: comp-phys-alps-users@phys.ethz.ch
> > Message-ID: <67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>
> > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
> >
> > What is the system size? There are finite size corrections. As you
> > increase the size it should converge
> >
> > Matthias
> >
> > On Dec 2, 2008, at 8:13 AM, zhian asadzadeh wrote:
> >
> > > Hi ADRIAN
> > > I run DMRG program for  antiferromagnetic S=1/2 chain,but the
> result
> > > that i achieve for groun state energy  doesn't concur with the
> > > result  that has achieved from bethe ansats method (0.443147).
> > > I have changed m&sweep& number of sites(to 1000 site) but my
> result
> > > just 2 digit concur with 0.443147.
> > > I don't know what must i do.
> > > I will be very appreciate  if you can guide me.
> > >
> > > Thanks
> > > zhian
> >
> >
> >
> > End of Comp-phys-alps-users Digest, Vol 33, Issue 1
> > ***************************************************
> >
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081204/30386c67/attachment-0001.htm
>
> ------------------------------
>
> Message: 2
> Date: Thu, 4 Dec 2008 22:29:05 +0100
> From: Matthias Troyer <troyer@phys.ethz.ch>
> Subject: Re: [ALPS-users] DMRG For Antiferromagnetic Spin one half
>        chain
> To: comp-phys-alps-users@phys.ethz.ch
> Message-ID: <F91F718B-C18F-432C-90CA-5A52B0C0841F@phys.ethz.ch>
> Content-Type: text/plain; charset="us-ascii"
>
> How many states do you keep?
>
> On Dec 4, 2008, at 8:05 PM, zhian asadzadeh wrote:
>
> > Hi Dear
> > Thanks for your consideration.I run the program for different sizes
> > and have increased it to 500 sites.For up to 100 site the result
> > converges but it is  not the result that should it be (0.443147),the
> > result  that have achieved earlier from Bethe method and in the work
> > of Mr.white that tests the DMRG for showing the powerful of this
> code.
> > Thanks
> > zhian
> >
> >
> > On Wed, Dec 3, 2008 at 2:30 PM, <comp-phys-alps-users-request@phys.ethz.ch
> > > wrote:
> > Send Comp-phys-alps-users mailing list submissions to
> >        comp-phys-alps-users@phys.ethz.ch
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> >        https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
> > or, via email, send a message with subject or body 'help' to
> >        comp-phys-alps-users-request@phys.ethz.ch
> >
> > You can reach the person managing the list at
> >        comp-phys-alps-users-owner@phys.ethz.ch
> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of Comp-phys-alps-users digest..."
> >
> >
> > Today's Topics:
> >
> >   1. DMRG for antiferromagnetic spin one half chain (zhian
> asadzadeh)
> >   2. Re: DMRG for antiferromagnetic spin one half chain
> >      (Matthias Troyer)
> >
> >
> >
> ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Tue, 2 Dec 2008 16:43:12 +0330
> > From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com>
> > Subject: [ALPS-users] DMRG for antiferromagnetic spin one half chain
> > To: comp-phys-alps-users@phys.ethz.ch
> > Message-ID:
> >        <89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Hi ADRIAN
> > I run DMRG program for  antiferromagnetic S=1/2 chain,but the result
> > that i
> > achieve for groun state energy  doesn't concur with the result  that
> > has
> > achieved from bethe ansats method (0.443147).
> > I have changed m&sweep& number of sites(to 1000 site) but my result
> > just 2
> > digit concur with 0.443147.
> > I don't know what must i do.
> > I will be very appreciate  if you can guide me.
> >
> > Thanks
> > zhian
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
> > URL: https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081202/0493cedb/attachment-0001.htm
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Tue, 2 Dec 2008 08:33:57 -0500
> > From: Matthias Troyer <troyer@phys.ethz.ch>
> > Subject: Re: [ALPS-users] DMRG for antiferromagnetic spin one half
> >        chain
> > To: comp-phys-alps-users@phys.ethz.ch
> > Message-ID: <67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>
> > Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
> >
> > What is the system size? There are finite size corrections. As you
> > increase the size it should converge
> >
> > Matthias
> >
> > On Dec 2, 2008, at 8:13 AM, zhian asadzadeh wrote:
> >
> > > Hi ADRIAN
> > > I run DMRG program for  antiferromagnetic S=1/2 chain,but the
> result
> > > that i achieve for groun state energy  doesn't concur with the
> > > result  that has achieved from bethe ansats method (0.443147).
> > > I have changed m&sweep& number of sites(to 1000 site) but my
> result
> > > just 2 digit concur with 0.443147.
> > > I don't know what must i do.
> > > I will be very appreciate  if you can guide me.
> > >
> > > Thanks
> > > zhian
> >
> >
> >
> > End of Comp-phys-alps-users Digest, Vol 33, Issue 1
> > ***************************************************
> >
>
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081204/be06f615/attachment-0001.htm
>
> ------------------------------
>
> Message: 3
> Date: Thu, 04 Dec 2008 14:32:09 -0800
> From: "Adrian E. Feiguin" <afeiguin@kitp.ucsb.edu>
> Subject: Re: [ALPS-users] DMRG For Antiferromagnetic Spin one half
>        chain
> To: comp-phys-alps-users@phys.ethz.ch
> Message-ID: <49385A69.90908@kitp.ucsb.edu>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Hi all,
>
> Sorry for the radio silence, but I've been travelling.
> As Matthais said, it would be useful if you could send us some
> numbers,
> for different sizes, and number of DMRG states.
>
> Saludos,
> <ADRIAN>
>
> Matthias Troyer wrote:
>
> > How many states do you keep?
> >
> > On Dec 4, 2008, at 8:05 PM, zhian asadzadeh wrote:
> >
> >> Hi Dear
> >> Thanks for your consideration.I run the program for different sizes
> >> and have increased it to 500 sites.For up to 100 site the result
> >> converges but it is  not the result that should it be
> >> (*0.443147*),the result  that have achieved earlier from Bethe
> method
> >> and in the work of Mr.white that tests the DMRG for showing the
> >> powerful of this code.
> >> Thanks
> >> zhian
> >>
> >>
> >> On Wed, Dec 3, 2008 at 2:30 PM,
> >> <comp-phys-alps-users-request@phys.ethz.ch
> >> <mailto:comp-phys-alps-users-request@phys.ethz.ch>> wrote:
> >>
> >>     Send Comp-phys-alps-users mailing list submissions to
> >>            comp-phys-alps-users@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users@phys.ethz.ch>
> >>
> >>     To subscribe or unsubscribe via the World Wide Web, visit
> >>
> >>      https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
> >>     or, via email, send a message with subject or body 'help' to
> >>            comp-phys-alps-users-request@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>
> >>
> >>     You can reach the person managing the list at
> >>            comp-phys-alps-users-owner@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users-owner@phys.ethz.ch>
> >>
> >>     When replying, please edit your Subject line so it is more
> specific
> >>     than "Re: Contents of Comp-phys-alps-users digest..."
> >>
> >>
> >>     Today's Topics:
> >>
> >>       1. DMRG for antiferromagnetic spin one half chain (zhian
> asadzadeh)
> >>       2. Re: DMRG for antiferromagnetic spin one half chain
> >>          (Matthias Troyer)
> >>
> >>
> >>
> ----------------------------------------------------------------------
> >>
> >>     Message: 1
> >>     Date: Tue, 2 Dec 2008 16:43:12 +0330
> >>     From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com
> >>     <mailto:zhian.asadzadeh@gmail.com>>
> >>     Subject: [ALPS-users] DMRG for antiferromagnetic spin one
> half chain
> >>     To: comp-phys-alps-users@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users@phys.ethz.ch>
> >>     Message-ID:
> >>
> >>      <89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com
> >>     <mailto:89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com
> >>
> >>     Content-Type: text/plain; charset="iso-8859-1"
> >>
> >>     Hi ADRIAN
> >>     I run DMRG program for  antiferromagnetic S=1/2 chain,but the
> >>     result that i
> >>     achieve for groun state energy  doesn't concur with the result
> >>      that has
> >>     achieved from bethe ansats method (0.443147).
> >>     I have changed m&sweep& number of sites(to 1000 site) but my
> >>     result just 2
> >>     digit concur with 0.443147.
> >>     I don't know what must i do.
> >>     I will be very appreciate  if you can guide me.
> >>
> >>     Thanks
> >>     zhian
> >>     -------------- next part --------------
> >>     An HTML attachment was scrubbed...
> >>     URL:
> >>     https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081202/0493cedb/attachment-0001.htm
> >>
> >>     ------------------------------
> >>
> >>     Message: 2
> >>     Date: Tue, 2 Dec 2008 08:33:57 -0500
> >>     From: Matthias Troyer <troyer@phys.ethz.ch
> >>     <mailto:troyer@phys.ethz.ch>>
> >>     Subject: Re: [ALPS-users] DMRG for antiferromagnetic spin one
> half
> >>            chain
> >>     To: comp-phys-alps-users@phys.ethz.ch
> >>     <mailto:comp-phys-alps-users@phys.ethz.ch>
> >>     Message-ID: <67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch
> >>     <mailto:67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>>
> >>     Content-Type: text/plain; charset=US-ASCII; format=flowed;
> delsp=yes
> >>
> >>     What is the system size? There are finite size corrections.
> As you
> >>     increase the size it should converge
> >>
> >>     Matthias
> >>
> >>     On Dec 2, 2008, at 8:13 AM, zhian asadzadeh wrote:
> >>
> >>     > Hi ADRIAN
> >>     > I run DMRG program for  antiferromagnetic S=1/2 chain,but the
> >>     result
> >>     > that i achieve for groun state energy  doesn't concur with
> the
> >>     > result  that has achieved from bethe ansats method
> (0.443147).
> >>     > I have changed m&sweep& number of sites(to 1000 site) but
> my result
> >>     > just 2 digit concur with 0.443147.
> >>     > I don't know what must i do.
> >>     > I will be very appreciate  if you can guide me.
> >>     >
> >>     > Thanks
> >>     > zhian
> >>
> >>
> >>
> >>     End of Comp-phys-alps-users Digest, Vol 33, Issue 1
> >>     ***************************************************
> >>
> >>
> >
>
>
>
> End of Comp-phys-alps-users Digest, Vol 33, Issue 3
> ***************************************************
>

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------------------------------

Message: 3
Date: Sat, 06 Dec 2008 15:00:16 -0800
From: "Adrian E. Feiguin" <afeiguin@kitp.ucsb.edu>
Subject: Re: [ALPS-users] DMRG For Antiferromagnetic spin one half
       chain
To: comp-phys-alps-users@phys.ethz.ch
Message-ID: <493B0400.50709@kitp.ucsb.edu>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Dear Zhian,

You values for L=100 are correct, but the value for L=300 is not. I am
getting -0.4422.. for L=200
The energy steadily goes down as you increase the system size, and if
you do a finite size scaling, it should converge to the exact value. The
convergence is slow for open boundary conditions. You can try with
periodic to see what you get (you'll need to keep more states, though)
Usually, 8 full sweeps (left to right, right to left) are enough. If you
see that the energy keeps changing as you sweep, then you may need to do
more sweeps. I think 4 to 8 full sweeps should be fine for the spin=1/2
chain.

Saludos,
<ADRIAN>

Matthias Troyer wrote:
> 4 sweeps seems far too little to me. Can you try with 50. Adrian, what
> would you recommend?
>
> Matthias
>
> On 6 Dec 2008, at 13:58, zhian asadzadeh wrote:
>
>> Hi Dears
>> Thanks a  lot. I have achieved the ground state energy  as follow:
>> SWEEP=8, L=30,MAXSTATES=100, E0= -0.437045191.
>> SWEEP=8, L=50,MAXSTATES=140, E0= -0.43944220.
>> SWEEP=4, L=100,MAXSTATES=100, E0= -0.44127739.
>> SWEEP=4, L=100,MAXSTATES=300, E0= -0.44127739.
>> SWEEP=4, L=300,MAXSTATES=100, E0= -0.44127739.
>> The E0= -0.44127739 is the best enegy that i achieve and when i
>> change the sweep&M&L,the energy doesn't change.I can't improve the
>> result ,also i wrote the model & lattice, but have not changed any thing.
>> Thanks.
>>
>>
>>
>>
>>
>> On Fri, Dec 5, 2008 at 6:00 AM,
>> <comp-phys-alps-users-request@phys.ethz.ch
>> <mailto:comp-phys-alps-users-request@phys.ethz.ch>> wrote:
>>
>>     Send Comp-phys-alps-users mailing list submissions to
>>            comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>
>>     To subscribe or unsubscribe via the World Wide Web, visit
>>
>>      https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
>>     or, via email, send a message with subject or body 'help' to
>>            comp-phys-alps-users-request@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>
>>
>>     You can reach the person managing the list at
>>            comp-phys-alps-users-owner@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-owner@phys.ethz.ch>
>>
>>     When replying, please edit your Subject line so it is more specific
>>     than "Re: Contents of Comp-phys-alps-users digest..."
>>
>>
>>     Today's Topics:
>>
>>       1. DMRG For Antiferromagnetic Spin one half chain (zhian asadzadeh)
>>       2. Re: DMRG For Antiferromagnetic Spin one half chain
>>          (Matthias Troyer)
>>       3. Re: DMRG For Antiferromagnetic Spin one half chain
>>          (Adrian E. Feiguin)
>>
>>
>>     ----------------------------------------------------------------------
>>
>>     Message: 1
>>     Date: Thu, 4 Dec 2008 22:35:51 +0330
>>     From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com
>>     <mailto:zhian.asadzadeh@gmail.com>>
>>     Subject: [ALPS-users] DMRG For Antiferromagnetic Spin one half chain
>>     To: comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     Message-ID:
>>
>>      <89e5d6760812041105w5556998du756af1c79c8fb32b@mail.gmail.com
>>     <mailto:89e5d6760812041105w5556998du756af1c79c8fb32b@mail.gmail.com>>
>>     Content-Type: text/plain; charset="iso-8859-1"
>>
>>     Hi Dear
>>     Thanks for your consideration.I run the program for different
>>     sizes and have
>>     increased it to 500 sites.For up to 100 site the result converges
>>     but it is
>>     not the result that should it be (*0.443147*),the result  that
>>     have achieved
>>     earlier from Bethe method and in the work of Mr.white that tests
>>     the DMRG
>>     for showing the powerful of this code.
>>     Thanks
>>     zhian
>>
>>
>>     On Wed, Dec 3, 2008 at 2:30 PM,
>>     <comp-phys-alps-users-request@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>>wrote:
>>
>>     > Send Comp-phys-alps-users mailing list submissions to
>>     >        comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     >
>>     > To subscribe or unsubscribe via the World Wide Web, visit
>>     >
>>      https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
>>     > or, via email, send a message with subject or body 'help' to
>>     >        comp-phys-alps-users-request@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>
>>     >
>>     > You can reach the person managing the list at
>>     >        comp-phys-alps-users-owner@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-owner@phys.ethz.ch>
>>     >
>>     > When replying, please edit your Subject line so it is more specific
>>     > than "Re: Contents of Comp-phys-alps-users digest..."
>>     >
>>     >
>>     > Today's Topics:
>>     >
>>     >   1. DMRG for antiferromagnetic spin one half chain (zhian
>>     asadzadeh)
>>     >   2. Re: DMRG for antiferromagnetic spin one half chain
>>     >      (Matthias Troyer)
>>     >
>>     >
>>     >
>>     ----------------------------------------------------------------------
>>     >
>>     > Message: 1
>>     > Date: Tue, 2 Dec 2008 16:43:12 +0330
>>     > From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com
>>     <mailto:zhian.asadzadeh@gmail.com>>
>>     > Subject: [ALPS-users] DMRG for antiferromagnetic spin one half
>>     chain
>>     > To: comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     > Message-ID:
>>     >
>>      <89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com
>>     <mailto:89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com>>
>>     > Content-Type: text/plain; charset="iso-8859-1"
>>     >
>>     > Hi ADRIAN
>>     > I run DMRG program for  antiferromagnetic S=1/2 chain,but the
>>     result that i
>>     > achieve for groun state energy  doesn't concur with the result
>>      that has
>>     > achieved from bethe ansats method (0.443147).
>>     > I have changed m&sweep& number of sites(to 1000 site) but my
>>     result just 2
>>     > digit concur with 0.443147.
>>     > I don't know what must i do.
>>     > I will be very appreciate  if you can guide me.
>>     >
>>     > Thanks
>>     > zhian
>>     > -------------- next part --------------
>>     > An HTML attachment was scrubbed...
>>     > URL:
>>     >
>>     https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081202/0493cedb/attachment-0001.htm
>>     >
>>     > ------------------------------
>>     >
>>     > Message: 2
>>     > Date: Tue, 2 Dec 2008 08:33:57 -0500
>>     > From: Matthias Troyer <troyer@phys.ethz.ch
>>     <mailto:troyer@phys.ethz.ch>>
>>     > Subject: Re: [ALPS-users] DMRG for antiferromagnetic spin one half
>>     >        chain
>>     > To: comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     > Message-ID: <67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch
>>     <mailto:67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>>
>>     > Content-Type: text/plain; charset=US-ASCII; format=flowed;
>>     delsp=yes
>>     >
>>     > What is the system size? There are finite size corrections. As you
>>     > increase the size it should converge
>>     >
>>     > Matthias
>>     >
>>     > On Dec 2, 2008, at 8:13 AM, zhian asadzadeh wrote:
>>     >
>>     > > Hi ADRIAN
>>     > > I run DMRG program for  antiferromagnetic S=1/2 chain,but the
>>     result
>>     > > that i achieve for groun state energy  doesn't concur with the
>>     > > result  that has achieved from bethe ansats method (0.443147).
>>     > > I have changed m&sweep& number of sites(to 1000 site) but my
>>     result
>>     > > just 2 digit concur with 0.443147.
>>     > > I don't know what must i do.
>>     > > I will be very appreciate  if you can guide me.
>>     > >
>>     > > Thanks
>>     > > zhian
>>     >
>>     >
>>     >
>>     > End of Comp-phys-alps-users Digest, Vol 33, Issue 1
>>     > ***************************************************
>>     >
>>     -------------- next part --------------
>>     An HTML attachment was scrubbed...
>>     URL:
>>     https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081204/30386c67/attachment-0001.htm
>>
>>     ------------------------------
>>
>>     Message: 2
>>     Date: Thu, 4 Dec 2008 22:29:05 +0100
>>     From: Matthias Troyer <troyer@phys.ethz.ch
>>     <mailto:troyer@phys.ethz.ch>>
>>     Subject: Re: [ALPS-users] DMRG For Antiferromagnetic Spin one half
>>            chain
>>     To: comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     Message-ID: <F91F718B-C18F-432C-90CA-5A52B0C0841F@phys.ethz.ch
>>     <mailto:F91F718B-C18F-432C-90CA-5A52B0C0841F@phys.ethz.ch>>
>>     Content-Type: text/plain; charset="us-ascii"
>>
>>     How many states do you keep?
>>
>>     On Dec 4, 2008, at 8:05 PM, zhian asadzadeh wrote:
>>
>>     > Hi Dear
>>     > Thanks for your consideration.I run the program for different sizes
>>     > and have increased it to 500 sites.For up to 100 site the result
>>     > converges but it is  not the result that should it be
>>     (0.443147),the
>>     > result  that have achieved earlier from Bethe method and in the
>>     work
>>     > of Mr.white that tests the DMRG for showing the powerful of
>>     this code.
>>     > Thanks
>>     > zhian
>>     >
>>     >
>>     > On Wed, Dec 3, 2008 at 2:30 PM,
>>     <comp-phys-alps-users-request@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>
>>     > > wrote:
>>     > Send Comp-phys-alps-users mailing list submissions to
>>     >        comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     >
>>     > To subscribe or unsubscribe via the World Wide Web, visit
>>     >
>>      https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
>>     > or, via email, send a message with subject or body 'help' to
>>     >        comp-phys-alps-users-request@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>
>>     >
>>     > You can reach the person managing the list at
>>     >        comp-phys-alps-users-owner@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-owner@phys.ethz.ch>
>>     >
>>     > When replying, please edit your Subject line so it is more specific
>>     > than "Re: Contents of Comp-phys-alps-users digest..."
>>     >
>>     >
>>     > Today's Topics:
>>     >
>>     >   1. DMRG for antiferromagnetic spin one half chain (zhian
>>     asadzadeh)
>>     >   2. Re: DMRG for antiferromagnetic spin one half chain
>>     >      (Matthias Troyer)
>>     >
>>     >
>>     >
>>     ----------------------------------------------------------------------
>>     >
>>     > Message: 1
>>     > Date: Tue, 2 Dec 2008 16:43:12 +0330
>>     > From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com
>>     <mailto:zhian.asadzadeh@gmail.com>>
>>     > Subject: [ALPS-users] DMRG for antiferromagnetic spin one half
>>     chain
>>     > To: comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     > Message-ID:
>>     >
>>      <89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com
>>     <mailto:89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com>>
>>     > Content-Type: text/plain; charset="iso-8859-1"
>>     >
>>     > Hi ADRIAN
>>     > I run DMRG program for  antiferromagnetic S=1/2 chain,but the
>>     result
>>     > that i
>>     > achieve for groun state energy  doesn't concur with the result
>>      that
>>     > has
>>     > achieved from bethe ansats method (0.443147).
>>     > I have changed m&sweep& number of sites(to 1000 site) but my result
>>     > just 2
>>     > digit concur with 0.443147.
>>     > I don't know what must i do.
>>     > I will be very appreciate  if you can guide me.
>>     >
>>     > Thanks
>>     > zhian
>>     > -------------- next part --------------
>>     > An HTML attachment was scrubbed...
>>     > URL:
>>     https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081202/0493cedb/attachment-0001.htm
>>     >
>>     > ------------------------------
>>     >
>>     > Message: 2
>>     > Date: Tue, 2 Dec 2008 08:33:57 -0500
>>     > From: Matthias Troyer <troyer@phys.ethz.ch
>>     <mailto:troyer@phys.ethz.ch>>
>>     > Subject: Re: [ALPS-users] DMRG for antiferromagnetic spin one half
>>     >        chain
>>     > To: comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     > Message-ID: <67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch
>>     <mailto:67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>>
>>     > Content-Type: text/plain; charset=US-ASCII; format=flowed;
>>     delsp=yes
>>     >
>>     > What is the system size? There are finite size corrections. As you
>>     > increase the size it should converge
>>     >
>>     > Matthias
>>     >
>>     > On Dec 2, 2008, at 8:13 AM, zhian asadzadeh wrote:
>>     >
>>     > > Hi ADRIAN
>>     > > I run DMRG program for  antiferromagnetic S=1/2 chain,but the
>>     result
>>     > > that i achieve for groun state energy  doesn't concur with the
>>     > > result  that has achieved from bethe ansats method (0.443147).
>>     > > I have changed m&sweep& number of sites(to 1000 site) but my
>>     result
>>     > > just 2 digit concur with 0.443147.
>>     > > I don't know what must i do.
>>     > > I will be very appreciate  if you can guide me.
>>     > >
>>     > > Thanks
>>     > > zhian
>>     >
>>     >
>>     >
>>     > End of Comp-phys-alps-users Digest, Vol 33, Issue 1
>>     > ***************************************************
>>     >
>>
>>     -------------- next part --------------
>>     An HTML attachment was scrubbed...
>>     URL:
>>     https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081204/be06f615/attachment-0001.htm
>>
>>     ------------------------------
>>
>>     Message: 3
>>     Date: Thu, 04 Dec 2008 14:32:09 -0800
>>     From: "Adrian E. Feiguin" <afeiguin@kitp.ucsb.edu
>>     <mailto:afeiguin@kitp.ucsb.edu>>
>>     Subject: Re: [ALPS-users] DMRG For Antiferromagnetic Spin one half
>>            chain
>>     To: comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     Message-ID: <49385A69.90908@kitp.ucsb.edu
>>     <mailto:49385A69.90908@kitp.ucsb.edu>>
>>     Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>>     Hi all,
>>
>>     Sorry for the radio silence, but I've been travelling.
>>     As Matthais said, it would be useful if you could send us some
>>     numbers,
>>     for different sizes, and number of DMRG states.
>>
>>     Saludos,
>>     <ADRIAN>
>>
>>     Matthias Troyer wrote:
>>
>>     > How many states do you keep?
>>     >
>>     > On Dec 4, 2008, at 8:05 PM, zhian asadzadeh wrote:
>>     >
>>     >> Hi Dear
>>     >> Thanks for your consideration.I run the program for different
>>     sizes
>>     >> and have increased it to 500 sites.For up to 100 site the result
>>     >> converges but it is  not the result that should it be
>>     >> (*0.443147*),the result  that have achieved earlier from Bethe
>>     method
>>     >> and in the work of Mr.white that tests the DMRG for showing the
>>     >> powerful of this code.
>>     >> Thanks
>>     >> zhian
>>     >>
>>     >>
>>     >> On Wed, Dec 3, 2008 at 2:30 PM,
>>     >> <comp-phys-alps-users-request@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>
>>     >> <mailto:comp-phys-alps-users-request@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>>> wrote:
>>     >>
>>     >>     Send Comp-phys-alps-users mailing list submissions to
>>     >>            comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     >>     <mailto:comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>>
>>     >>
>>     >>     To subscribe or unsubscribe via the World Wide Web, visit
>>     >>
>>     >>
>>      https://webmail.phys.ethz.ch/mailman/listinfo/comp-phys-alps-users
>>     >>     or, via email, send a message with subject or body 'help' to
>>     >>            comp-phys-alps-users-request@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>
>>     >>     <mailto:comp-phys-alps-users-request@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-request@phys.ethz.ch>>
>>     >>
>>     >>     You can reach the person managing the list at
>>     >>            comp-phys-alps-users-owner@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-owner@phys.ethz.ch>
>>     >>     <mailto:comp-phys-alps-users-owner@phys.ethz.ch
>>     <mailto:comp-phys-alps-users-owner@phys.ethz.ch>>
>>     >>
>>     >>     When replying, please edit your Subject line so it is more
>>     specific
>>     >>     than "Re: Contents of Comp-phys-alps-users digest..."
>>     >>
>>     >>
>>     >>     Today's Topics:
>>     >>
>>     >>       1. DMRG for antiferromagnetic spin one half chain (zhian
>>     asadzadeh)
>>     >>       2. Re: DMRG for antiferromagnetic spin one half chain
>>     >>          (Matthias Troyer)
>>     >>
>>     >>
>>     >>
>>     ----------------------------------------------------------------------
>>     >>
>>     >>     Message: 1
>>     >>     Date: Tue, 2 Dec 2008 16:43:12 +0330
>>     >>     From: "zhian asadzadeh" <zhian.asadzadeh@gmail.com
>>     <mailto:zhian.asadzadeh@gmail.com>
>>     >>     <mailto:zhian.asadzadeh@gmail.com
>>     <mailto:zhian.asadzadeh@gmail.com>>>
>>     >>     Subject: [ALPS-users] DMRG for antiferromagnetic spin one
>>     half chain
>>     >>     To: comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     >>     <mailto:comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>>
>>     >>     Message-ID:
>>     >>
>>     >>
>>      <89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com
>>     <mailto:89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com>
>>     >>
>>     <mailto:89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com
>>     <mailto:89e5d6760812020513q686feb0bge51a267945421f2@mail.gmail.com>>>
>>     >>     Content-Type: text/plain; charset="iso-8859-1"
>>     >>
>>     >>     Hi ADRIAN
>>     >>     I run DMRG program for  antiferromagnetic S=1/2 chain,but the
>>     >>     result that i
>>     >>     achieve for groun state energy  doesn't concur with the result
>>     >>      that has
>>     >>     achieved from bethe ansats method (0.443147).
>>     >>     I have changed m&sweep& number of sites(to 1000 site) but my
>>     >>     result just 2
>>     >>     digit concur with 0.443147.
>>     >>     I don't know what must i do.
>>     >>     I will be very appreciate  if you can guide me.
>>     >>
>>     >>     Thanks
>>     >>     zhian
>>     >>     -------------- next part --------------
>>     >>     An HTML attachment was scrubbed...
>>     >>     URL:
>>     >>
>>     https://webmail.phys.ethz.ch/mailman/private/comp-phys-alps-users/attachments/20081202/0493cedb/attachment-0001.htm
>>     >>
>>     >>     ------------------------------
>>     >>
>>     >>     Message: 2
>>     >>     Date: Tue, 2 Dec 2008 08:33:57 -0500
>>     >>     From: Matthias Troyer <troyer@phys.ethz.ch
>>     <mailto:troyer@phys.ethz.ch>
>>     >>     <mailto:troyer@phys.ethz.ch <mailto:troyer@phys.ethz.ch>>>
>>     >>     Subject: Re: [ALPS-users] DMRG for antiferromagnetic spin
>>     one half
>>     >>            chain
>>     >>     To: comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>
>>     >>     <mailto:comp-phys-alps-users@phys.ethz.ch
>>     <mailto:comp-phys-alps-users@phys.ethz.ch>>
>>     >>     Message-ID:
>>     <67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch
>>     <mailto:67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>
>>     >>     <mailto:67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch
>>     <mailto:67427F34-DE94-4D41-A49C-A3BC801E4BA7@phys.ethz.ch>>>
>>     >>     Content-Type: text/plain; charset=US-ASCII; format=flowed;
>>     delsp=yes
>>     >>
>>     >>     What is the system size? There are finite size
>>     corrections. As you
>>     >>     increase the size it should converge
>>     >>
>>     >>     Matthias
>>     >>
>>     >>     On Dec 2, 2008, at 8:13 AM, zhian asadzadeh wrote:
>>     >>
>>     >>     > Hi ADRIAN
>>     >>     > I run DMRG program for  antiferromagnetic S=1/2
>>     chain,but the
>>     >>     result
>>     >>     > that i achieve for groun state energy  doesn't concur
>>     with the
>>     >>     > result  that has achieved from bethe ansats method
>>     (0.443147).
>>     >>     > I have changed m&sweep& number of sites(to 1000 site)
>>     but my result
>>     >>     > just 2 digit concur with 0.443147.
>>     >>     > I don't know what must i do.
>>     >>     > I will be very appreciate  if you can guide me.
>>     >>     >
>>     >>     > Thanks
>>     >>     > zhian
>>     >>
>>     >>
>>     >>
>>     >>     End of Comp-phys-alps-users Digest, Vol 33, Issue 1
>>     >>     ***************************************************
>>     >>
>>     >>
>>     >
>>
>>
>>
>>     End of Comp-phys-alps-users Digest, Vol 33, Issue 3
>>     ***************************************************
>>
>>
>



End of Comp-phys-alps-users Digest, Vol 33, Issue 4
***************************************************