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"Quantumness" versus "Classicality" of Quantum States

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arxiv quant-ph/0703103 v1 pith:V3QA6AQL submitted 2007-03-13 quant-ph

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keywords quantumstatesquantumnessclassicalityinterestingnonentangledseparableversus
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Entanglement is one of the pillars of quantum mechanics and quantum information processing, and as a result the quantumness of nonentangled states has typically been overlooked and unrecognized. We give a robust definition for the classicality versus quantumness of a single multipartite quantum state, a set of states, and a protocol using quantum states. We show a variety of nonentangled (separable) states that exhibit interesting quantum properties, and we explore the ``zoo'' of separable states; several interesting subclasses are defined based on their diagonalizing bases, and their non-classical behavior is investigated.

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Cited by 1 Pith paper

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

  1. Superactivation of memory effects in a classical Markov environment

    quant-ph 2024-11 conditional novelty 6.0 of 10

    Superactivation of backflow of information is realized in a collision model with a classical Markov-chain environment, and the resource needed is quantumness of the Helstrom ensemble rather than entanglement.

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