All degree six local unitary invariants of k qudits
classification
🪐 quant-ph
math-phmath.MP
keywords
degreelocalunitaryabstractalgebraicallycarrydimensionalexplicit
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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.
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