Tight information bounds for spontaneous-emission-lifetime resolution of quantum sources with varied spectral purity

Cheyenne S. Mitchell; Mikael P. Backlund

doi:10.1103/PhysRevA.108.023712

Tight information bounds for spontaneous-emission-lifetime resolution of quantum sources with varied spectral purity

Cheyenne S. Mitchell, Mikael P. Backlund

Research output: Contribution to journal › Article › peer-review

Abstract

We generalize the theory of resolving a mixture of two closely spaced spontaneous emission lifetimes to include pure dephasing contributions to decoherence, leading to the resurgence of Rayleigh's curse at small lifetime separations. Considerable resolution enhancement remains possible when lifetime broadening is more significant than that due to pure dephasing. In the limit that lifetime broadening dominates, one can achieve super-resolution either by a tailored one-photon measurement or by Hong-Ou-Mandel interferometry. We describe conditions for which either choice is superior.

Original language	English (US)
Article number	023712
Journal	Physical Review A
Volume	108
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.108.023712
State	Published - Aug 2023
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.108.023712

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abstract = "We generalize the theory of resolving a mixture of two closely spaced spontaneous emission lifetimes to include pure dephasing contributions to decoherence, leading to the resurgence of Rayleigh's curse at small lifetime separations. Considerable resolution enhancement remains possible when lifetime broadening is more significant than that due to pure dephasing. In the limit that lifetime broadening dominates, one can achieve super-resolution either by a tailored one-photon measurement or by Hong-Ou-Mandel interferometry. We describe conditions for which either choice is superior.",

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AB - We generalize the theory of resolving a mixture of two closely spaced spontaneous emission lifetimes to include pure dephasing contributions to decoherence, leading to the resurgence of Rayleigh's curse at small lifetime separations. Considerable resolution enhancement remains possible when lifetime broadening is more significant than that due to pure dephasing. In the limit that lifetime broadening dominates, one can achieve super-resolution either by a tailored one-photon measurement or by Hong-Ou-Mandel interferometry. We describe conditions for which either choice is superior.

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Tight information bounds for spontaneous-emission-lifetime resolution of quantum sources with varied spectral purity

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