6.1. Input files for DSQSS/PMWA

In the input file of DSQSS/DLA and DSQSS/PMWA, there are many common parameters. In this section, the parameters which are not included in DSQSS/DLA or where the usage is different from DSQSS/DLA are explained.

  • Parameters for calculation conditions

Parameter

type

default

description

RUNTYPE

int

Calculation mode (0: from scratch, 1: restart)

CB

int

0

Initial pattern (0: Vacuum, 1: Checker-Board, 2: Random)

NWORMAX

int

1000

The maximum number of worms. When the value is equal to be -1, the upper limit becomes infinity.

Step_x

int

1

The spatial width in calculating the correlation functions.

Step_k

int

1

The width of the wave-number space in calculating correlation functions of wave-number representation.

  • Parameters related to the model

Parameter

type

description

t

double

\(t\) in boson system. \(J_{xy}\) in spin system.

U

double

\(U\) in boson system. This parameter is not used in spin system.

V

double

\(V\) in boson system. \(J_{z}\) in spin system.

MU

double

\(\mu\) in boson system. \(H\) in spin system.

G

double

\(\Gamma\) in boson system. \(\Gamma/2\) in spin system.

NMAX

-

This value is not used (always fixed to be 1).

  • Parameters for the lattice

Parameter

type

default

description

NLdiv

int

1

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

NBdiv

int

1

The number of divisions of L

NFIELD

int

0

The type of magnetic field (basically set to 0)

An example of the input file is shown as follows:

RUNTYPE = 0
NSET  = 10
NMCS  = 1000
NPRE = 1000
NTHERM = 1000
NDECOR = 1000
SEED  = 31415
NC    = 0
NVERMAX = 10000000
NWORMAX = 1000
algfile   = algorithm.xml
latfile   = lattice.xml
outfile   = sample.log
CB      = 2
G       = 0.3
U       = 0
V       = 3
t       = 1
MU      = 2
NMAX    = 1