Non-monotonic projection probabilities as a function of distinguishability
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Publication:3387969
DOI10.1088/1367-2630/16/1/013006zbMath1451.81063arXiv1312.0055OpenAlexW2033689609WikidataQ60316825 ScholiaQ60316825MaRDI QIDQ3387969
Publication date: 8 January 2021
Published in: New Journal of Physics (Search for Journal in Brave)
Abstract: Typically, quantum superpositions, and thus measurement projections of quantum states involving interference, decrease (or increase) monotonically as a function of increased distinguishability. Distinguishability, in turn, can be a consequence of decoherence, for example caused by the (simultaneous) loss of excitation or due to inadequate mode matching (either deliberate or indeliberate). It is known that for some cases of multi-photon interference, non-monotonic decay of projection probabilities occurs, which has so far been attributed to interference between four or more two photons. We show that such a non-monotonic behaviour of projection probabilities is not unnatural, and can also occur for single-photon and even semiclassical states. Thus, while the effect traces its roots from indistinguishability and thus interference, the states for which this can be observed do not need to have particular quantum features.
Full work available at URL: https://arxiv.org/abs/1312.0055
Quantum coherence, entanglement, quantum correlations (81P40) Open systems, reduced dynamics, master equations, decoherence (81S22) Entanglement measures, concurrencies, separability criteria (81P42)
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