4.6 Article

All degree 6 local unitary invariants of k qudits

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IOP PUBLISHING LTD
DOI: 10.1088/1751-8113/45/6/065302

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  1. New Hungary Development Plan [TAMOP-4.2.1/B-09/1/KMR-2010-0002]

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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.

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