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.chwrote:
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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, comp-phys-alps-users-request@phys.ethz.chwrote:
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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