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Quantum-enhanced measurements: beating the standard quantum limit

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arxiv quant-ph/0412078 v1 pith:MPRVMDGA submitted 2004-12-10 quant-ph

Quantum-enhanced measurements: beating the standard quantum limit

classification quant-ph
keywords quantumlimitlimitsconventionalheisenbergmeasurementmeasurementsprecision
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits to the precision of measurement. Conventional measurement techniques typically fail to reach these limits. Conventional bounds to the precision of measurements such as the shot noise limit or the standard quantum limit are not as fundamental as the Heisenberg limits, and can be beaten using quantum strategies that employ `quantum tricks' such as squeezing and entanglement.

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Cited by 3 Pith papers

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

  1. Entanglement in quantum channel discrimination: sometimes less is more

    quant-ph 2026-05 unverdicted novelty 7.0

    The paper shows that for some pairs of unitary channels, perfect discrimination is possible with separable states but nearly impossible with maximally entangled states, introducing MEWC and MEBC concepts.

  2. Precision limits for time-dependent quantum metrology under Markovian noise

    quant-ph 2026-05 unverdicted novelty 7.0

    Derives differential upper bounds on quantum Fisher information for time-dependent metrology under Markovian noise and proves universal long-time scaling laws saturated by quantum error correction.

  3. From the Hong-Ou-Mandel Effect to Quantum Sensing: Interference of Nonclassical Light with Partial Distinguishability and Noise

    quant-ph 2026-07 accept novelty 6.5

    New Fock-state suppression laws, a partial-distinguishability extension of Gaussian Boson Sampling via overlap matrices, and a proof that measurement incompatibility survives even when probe incompatibility vanishes f...