# Difference between revisions of "ALPS 2 Tutorials:MC-01 Equilibration"

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== Example: Quantum Monte Carlo (directed worm algorithm) simulations == | == Example: Quantum Monte Carlo (directed worm algorithm) simulations == | ||

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+ | As an example, we consider a Quantum Monte Carlo simulation implemented in the directed worm algorithm for boson Hubbard model in square lattice geometry of size 20<sup>2</sup>. | ||

=== Using command line === | === Using command line === | ||

+ | The parameter file [http://alps.comp-phys.org/static/tutorials2.1.0/mc-01b-equilibration/parm1a parm1a] | ||

LATTICE="square lattice" | LATTICE="square lattice" |

## Revision as of 16:01, 27 August 2013

# Equilibration

**Rule of thumb: All Monte Carlo simulations have to be equilibrated before taking measurements.**

## Example: Quantum Monte Carlo (directed worm algorithm) simulations

As an example, we consider a Quantum Monte Carlo simulation implemented in the directed worm algorithm for boson Hubbard model in square lattice geometry of size 20^{2}.

### Using command line

The parameter file parm1a

LATTICE="square lattice" MODEL="boson Hubbard" L=20 Nmax=20 t=1. U=16. mu=32. THERMALIZATION=10000 SWEEPS=100000 SKIP=400 {T=1.0}