Composite parameterization of unitary groups

Generates unitary and special unitary matrices using the composite parameterization.

This file provides implementations of the composite parameterization of the unitary group U(d) and special unitary group SU(d) of arbitrary dimension d.

>> UC.m

For an arbitrary dxd real matrix 'lambda' the function UC(lambda) returns a unitary matrix of dimension dxd.

>> UCS.m

For an arbitrary dxd real matrix 'lambda' the function UCS(lambda) returns a special unitary matrix of dimension dxd. (Note that for special unitaries the (d,d)-entry of lambda is ignored)

For details on the meaning of the entries of the matrix lambda see the references

http://arxiv.org/abs/1004.5252 and
http://arxiv.org/abs/1103.3408

Please cite these papers when using this file!