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Novel Schemes for Directly Measuring Entanglement of General States

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arxiv 0804.2246 v3 pith:5SLY3YX4 submitted 2008-04-14 quant-ph

classification quant-ph
keywords entanglementdirectlyentangledstatesgeneralmeasuringschemesstate
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An intrinsic relation between maximally entangled states and entanglement measures is revealed, which plays a role in establishing connections for different entanglement quantifiers. We exploit the basic idea and propose a framework to construct schemes for directly measuring entanglement of general states. In particular, we demonstrate that rank-1 local factorizable projective measurements, which are achievable with only one copy of entangled state involved at a time in a sequential way, are sufficient to directly determine the concurrence of arbitrary two-qubit entangled state.

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

  1. Singular value transformation for unknown quantum channels

    quant-ph 2025-06 conditional novelty 7.0 of 10

    An algorithm block-encodes the Liouville representation of an unknown quantum channel from black-box access, enabling polynomial transformations of its singular values via QSVT.

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