Difference between revisions of "Weyl.m"

Revision as of 21:20, 22 February 2026

Weyl boson operators (sparse, see below for normalisa- tion convention) for a bosonic mode with a user-specified population number truncation.

                         A=weyl(nlevels)

        nlevels - an integer specifying the
                  number of population levels

        A.u - unit operator
        A.c - creation operator
        A.a - annihilation operator
        A.n - population number operator

See examples in the Spinach distribution relevant to this function.

This page was generated from the function header in the Spinach repository.

@@ Line 17: / Line 17: @@
           A.a - annihilation operator
           A.n - population number operator
-     Note: the matrices are normalised to obey the following
-           relations for all energy level counts
-                      A.c*A.a=A.n,  [A.n,A.c]=A.c
-                    [A.n,A.a]=-A.a,  [A.a,A.c]=A.u
-           except for the edge state at which [A.a,A.c] ele-
-           ment is (1-nlevels), this is unavoidable.
-     Note: arrays are declared complex at build time to avoid
-           expensive reallocation operations later on.
 ==Examples==