All degree six local unitary invariants of k qudits
Quantum Physics
2015-03-19 v3 Mathematical Physics
math.MP
Abstract
We give explicit index-free formulae for all the degree six (and also degree four and two) algebraically independent local unitary invariant polynomials for finite dimensional k-partite pure and mixed quantum states. We carry out this by the use of graph-technical methods, which provides illustrations for this abstract topic.
Keywords
Cite
@article{arxiv.1105.3086,
title = {All degree six local unitary invariants of k qudits},
author = {Szilárd Szalay},
journal= {arXiv preprint arXiv:1105.3086},
year = {2015}
}
Comments
18 pages, 6 figures, extended version. Comments are welcome