Limits of atomic entanglement by cavity feedback: From weak to strong coupling

Krzysztof Pawłowski, Jérôme Estève, Jakob Reichel, Alice Sinatra

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We theoretically investigate the entangled states of an atomic ensemble that can be obtained via cavity feedback, varying the atom-light coupling from weak to strong, and including a systematic treatment of decoherence. In the strong-coupling regime for small atomic ensembles, the system is driven by cavity losses into a long-lived, highly entangled many-body state that we characterize analytically. In the weak-coupling regime for large ensembles, we find analytically the maximum spin-squeezing that can be achieved by optimizing both the coupling and the atom number. This squeezing is fundamentally limited by spontaneous emission to a constant value, which is independent of the atom number.

Original languageEnglish (US)
Article number34005
Issue number3
StatePublished - Feb 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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