Determinantal QMC (BSS-QMC)

Documentation of code by Fakher Assaad

Usage

1. Preparation
   1. Create paramHUB
   2. Create seeds
   3. Create confin
2. Running
   1. ./Hubb.out
3. Analysis
   1. Create Files_tau
   2. Run analysis: bash annal.c

Example input files with documentation

paramHUB

4.0 5.00 0.0 40  20  10  100
4 1 
RHUB, BETA, CHEM, LTROT, NWRAP, NBIN, NSWEEP
L, Ltau

seeds

754837

just one integer number

confin

Two possibilities: (i) empty Ising spin configuration:

0

(ii) configuration copied from confout of previous run:

131358357
 1
 -1
 -1
 1
 -1
 1
 1
 -1
 -1
 1
 -1
 -1
 -1
 1
 1
 1
 1
 -1
 -1
 1
 -1
 1
 -1
 1
 -1
 -1
 -1
 -1
 -1
 1
 1
 1
 1
 -1
 1
 -1
 -1
 1
 -1
 -1
 -1
 1
 -1
 -1
 -1
 1

Files_tau

3 3
spin   2
gr 1
charge 2

subsequent lines: file Nflag (value of Nflag is written to file Flag before cov_tau.out is called). NFlag=2 indicates symmetry in tau <-> beta-tau: (from cov_tau.out):

         If (NFlag.eq.2) Then 
            NTDM = LTROT/2 + 1
         else
            NTDM = LTROT  + 1
         endif

Output files

• direct program output
  • enerJ static observables
  • ...
• results of analysis
  • grR0 local Green function
  • gr_n_m (integers 1<=n,m<=L) k-dependent Green function
  • similarly with charge and spin instead of gr