Thank you for your consideration.
My model is anisotropic Ferrimagnetic chain in transverse magnetic field.
when I say the result is wrong I mean when I have tried to obtain energy gap
for some problems and models which have been solved earlier I saw the
result doesn't agree with those earlier results. for example spin one and
half-one chain and ferrimagnetic chain and anisotropic ferrimagnetic
ladder.
Something is not very obvius for me, how DMRG calculate ground state and
first exited state from one wave function ?!
Thanks,
Zhian.
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Today's Topics:
- Re: Energy Gap (Matthias Troyer)
Message: 1
Date: Mon, 16 Mar 2009 12:33:11 -0700
From: Matthias Troyer troyer@phys.ethz.ch
Subject: Re: [ALPS-users] Energy Gap
To: comp-phys-alps-users@phys.ethz.ch
Message-ID: 43E825E5-7BE3-4EA0-9C2A-20A1FC8C21AF@phys.ethz.ch
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
On Mar 16, 2009, at 2:01 AM, zhian asadzadeh wrote:
Hi All,
I want to calculate energy gap for spin chain with DMRG. I set
NUM_EIGENVALUES=2 in my parm file but the result which achieved is
wrong.
Is it necessary to determine something else for example the sector
which DMRG work in it? in my problem I dont have any good symmetry
and I can not easily determine the sector which the first exited
state is in it. I would be very appreciate if someone could please
help me.
Thanks,
Zhian.
Can you please send more details about your model, or better yet the
input file? An what do you mean exactly by saying that the result is
wrong?
Matthias
End of Comp-phys-alps-users Digest, Vol 36, Issue 10