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 journalArticlepeer-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 languageEnglish (US)
Article number023712
JournalPhysical Review A
Volume108
Issue number2
DOIs
StatePublished - Aug 2023
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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