4 sweeps seems far too little to me. Can you try with 50. Adrian, what
would you recommend?
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
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Today's Topics:
- DMRG For Antiferromagnetic Spin one half chain (zhian asadzadeh)
- Re: DMRG For Antiferromagnetic Spin one half chain
(Matthias Troyer)
- 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,
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Today's Topics:
- DMRG for antiferromagnetic spin one half chain (zhian
asadzadeh)
- 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