Unit oper.m

Returns a unit operator in the current formalism and basis. The operator has dimension equal to the basis size in sphten-liouv formalism, the dimension equal to the product of all spin multiplicities in zeeman-hilb formalism, and the dimension of square of the product of all spin multiplicities in zeeman-liouv formalism.

Syntax

    A=unit_oper(spin_system)

Arguments

    spin_system  - Spinach data object containing basis 
                   information (call basis.m first)

Outputs

    A            - a sparse unit matrix of appropriate
                   dimension 

See also

unit_state.m, mprealloc.m, operator.m, state.m

Version 2.3, authors: Ilya Kuprov, Dmitry Savostyanov