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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)


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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
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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
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