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Quantifying Coherence and Entanglement via Simple Measurements

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arxiv 1707.09928 v1 pith:NNOXHIME submitted 2017-07-31 quant-ph

classification quant-ph
keywords coherenceentanglementquantummeasurementsstateboundscarryingchallenging
verification ladder T0 review T1 audit T2 compute T3 formal
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Coherence and entanglement are fundamental properties of quantum systems, promising to power the near future quantum computers, sensors and simulators. Yet, their experimental detection is challenging, usually requiring full reconstruction of the system state. We show that one can extract quantitative bounds to the relative entropy of coherence and the coherent information, coherence and entanglement quantifiers respectively, by a limited number of purity measurements. The scheme is readily implementable with current technology to verify quantum computations in large scale registers, without carrying out expensive state tomography.

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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. A unified approach to quantum resource theories and a new class of free operations

    quant-ph 2025-07 conditional novelty 6.0 of 10

    Quantum resource theories are unified by describing each as the automorphism group of a preferred algebraic structure, yielding a new family of complexified free operations for Lie-algebra-based theories.

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