All degree 6 local unitary invariants of k qudits

作者:Szalay Szilard*
来源:Journal of Physics A-Mathematical and Theoretical, 2012, 45(6): 065302.
DOI:10.1088/1751-8113/45/6/065302

摘要

We give explicit index-free formulae for all the degree 6 (and also degree 4 and 2) algebraically independent local unitary invariant polynomials for finite-dimensional k-partite pure and mixed quantum states. We carry this out using graph-technical methods, which provide illustrations for this abstract topic.

  • 出版日期2012-2-17