5.2.1. Make an input file for a lattice

In PMWA, as a simple tool lattgene_P is prepared for generating a lattice definition file lattice.xml for a standard model. In this section, the usage of lattgene_P is explained.

lattgene_P generates a lattice definition file for a cubic lattice. The parameters to be specified are as follows.

Parameter

type

Remarks

D

int

The dimensions

L

int

The size of the lattice (specified for each dimension consecutively)

B

double

The inverse temperature

NLdiv

int

The number of divisions of L (divide NLdiv for each dimension)

NBdiv

int

The number of divisions of L

NFIELD

int

The type of magnetic field (basically set to 0)

Examples of use are described below.

  1. One-dimensional 8-sites chain, inverse temperature 10.0, definition of lattice file when division number is 1:

    $ lattgene_P 1 8 10.0 1 1 0

  2. Two dimensional 4*4 sites lattice, reverse temperature 10.0, definition of lattice file when division number is 1:

    $ lattgene_P 2 4 4 10.0 1 1 0