Field Layout

Arguments:

• npw (int array) - Number of grid points (plane waves) used in each dimension. Powers of two will result in optimal performance. Length is equal to number of dimensions.

• npw = “auto” (str) - Automatically set number of grid points using cell dimenstions and the minimum species smearing length. By default only included possibilities

  that are factors of 2 and 3 but this can be manually specified by using “autoXY” where X is a sequence of integers. For example auto2 will only allow factors of 2, auto235 allows factors of 2,3,5 etc. Note that this requires all species smearing lengths to be non-zero.

• random_seed (int) - seed for random number generator. Random number generator is used for initializing fields at random, or for complex langevin sampling, etc.

Example (python)

import openfts
fts = openfts.OpenFTS()
...
fts.field_layout(npw=[64],random_seed=1)
fts.field_layout(npw="auto",random_seed=1)
fts.field_layout(npw="auto2",random_seed=1)
...

Example (json)

"fieldlayout": {
  "npw": [ 32, 32 ],
  "random_seed": 1
},

"fieldlayout": {
  "npw": "auto",
  "random_seed": 1
},