Difference between revisions of "ALPS 2 Tutorials:DWA-01 Revisiting MC05"

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(Preparing and running the simulation from the command line)
(Preparing and running the simulation from the command line)
Line 27: Line 27:
 
   { t=0.08; }
 
   { t=0.08; }
 
   { t=0.09; }
 
   { t=0.09; }
   { t=0.1;   }
+
   { t=0.1; }
  
  
 
Using the standard sequence of commands you can run the simulation using the quantum dwa code
 
Using the standard sequence of commands you can run the simulation using the quantum dwa code

Revision as of 18:58, 10 September 2013

Quantum phase transitions in the Bose-Hubbard model

As an example of the dwa QMC code we will study a quantum phase transition in the Bose-Hubbard mode.

Superfluid density in the Bose Hubbard model

Preparing and running the simulation from the command line

The parameter file parm5a sets up Monte Carlo simulations of the quantum Bose Hubbard model on a square lattice with 4x4 sites for a couple of hopping parameters (t=0.01, 0.02, ..., 0.1) using the dwa code.

 LATTICE="square lattice";
 L=4;
 MODEL="boson Hubbard";
 NONLOCAL=0;
 U    = 1.0;
 mu   = 0.5;
 Nmax = 2;
 T = 0.1;
 SWEEPS=500000;
 THERMALIZATION=10000;
 { t=0.01; }
 { t=0.02; }
 { t=0.03; }
 { t=0.04; }
 { t=0.05; }
 { t=0.06; }
 { t=0.07; }
 { t=0.08; }
 { t=0.09; }
 { t=0.1;  }


Using the standard sequence of commands you can run the simulation using the quantum dwa code