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The PSCF package allows users to perform two primary types of field theoretic calculation. These are:

Self-Consistent Field Theory (SCFT)
Partial Saddle-Point Field Theoretic Simulation (PS-FTS)

SCFT calculations can be performed with any of the three PSCF programs (pscf_1d, pscf_pc and pscf_pg). PS-FTS calculations that use either Brownian dynamics or Monte-Carlo sampling techniques can be performed with the pscf_pc and pscf_pg programs for periodic systems, but not with the pscf_1d program.

All three PSCF programs can also perform SCFT parameter sweeps. A parameter sweep is an operations that performs a sequence of SCFT calculations for slightly different choices of parameter values spaced along a path through parameter space, as discussed in more detail here.

Each of the PSCF programs is initialized using data in a parameter file and then executes a series of commands specified in a command file. Each of the following commands performs one of the types of calculation described above:

ITERATE performs a single SCFT calculation
SWEEP performs a SCFT parameter sweep
SIMULATE performs a PS-FTS calculation

The format of a parameter file contains some optional elements that are required for some types of calculations but unnecessary for others. The required format of a parameter file thus depends to some extent on what type of commands are used in the associated command file.

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