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Theoretical and computational aspects of entanglement

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arxiv 1705.07160 v1 pith:X6EOEKLB submitted 2017-05-19 quant-ph

classification quant-ph
keywords entanglementmaximumnormnucleard-densitystatestensortensors
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abstract

We show that the two notions of entanglement: the maximum of the geometric measure of entanglement and the maximum of the nuclear norm is attained for the same states. We affirm the conjecture of Higuchi-Sudberry on the maximum entangled state of four qubits. We introduce the notion of d-density tensor for mixed d-partite states. We show that d-density tensor is separable if and only if its nuclear norm is $1$. We suggest an alternating method for computing the nuclear norm of tensors. We apply the above results to symmetric tensors. We give many numerical examples.

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Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Chiral Symmetries and Multiparticle Entanglement

    quant-ph 2025-06 conditional novelty 7.0 of 10

    Chiral symmetric three-particle subspaces are maximally entangled, yield U⊗3-invariant entanglement witnesses, and lead to a simple SDP solution for genuine multipartite entanglement in unitarily invariant states.

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