Dear Mattias,

Thank you very much for your letter.
Please find my questions and comments below.

Thank you in advance, 
Ruben

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From: Matthias Troyer <troyer@phys.ethz.ch>
To: comp-phys-alps-users@lists.phys.ethz.ch
Sent: Sat, December 18, 2010 1:06:54 PM
Subject: Re: [ALPS-users] anisotropic Heisenberg model setup


On Dec 18, 2010, at 5:02 PM, Ruben Ghulghazaryan wrote:

> Hi Mattias,
> 
> Should i use Jz=1, Jxy=1 and  Jz0=1, Jxy0=1, Jz1=1, Jxy1=1 setting for my experiment?

This would be isotropic and not anisotropic.

---> That's correct. This is why, we should  expect that the results of simulations be absolutely the same for fulldiag program. But simulations show different results for 
Jz=1, Jxy=1 and  Jz0=1, Jxy0=1, Jz1=1, Jxy1=1 settings. That is confusing.

I want to make sure that anisotropic program works as expected that is why I want to make this experiment and check whether anisotropic model 
with the same settings for different bond types and isotropic model with the same interaction bond term give same results.
My tests show that the results are not the same and this may be an indication of a problem with program or miss usage from my side.