Thanks for your reply! Is there any QMC code on ALPS can do the fermion Hubbard model?
Best, TaoYing
2013/9/8 Matthias Troyer troyer@phys.ethz.ch
The dirloop SSE code cannot do fermionic models because the sign problem would be horribly bad
On Sep 8, 2013, at 3:05, Tao Ying taoying86@gmail.com wrote:
Dear developers,
I want to simulate the fermion Hubbard model using dirloop_sse, how can I write the parameter file? I did the following:
LATTICE="square lattice"; L=8; W=8; MODEL="fermion Hubbard"; U = 5.0; V = 0.0; t = 1.0; T = 0.05; SWEEPS=2000; THERMALIZATION=5000; { mu=0.0; }
Then an error occured: Cannot convert fermionic operator to a bosonic matrix. What's wrong with it? If I want to measure the structure factor or correlation function, do I need to add the following in the parameter file? REPRESENTATION="SSE"; MEASURE[Correlations]=true; MEASURE[Structure Factor]=true; MEASURE[Green Function]=true;
Best, TaoYing -- Tao Ying, Ph.D candidate, Physics department Harbin Institute of Technology