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:

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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)


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

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