Strongly enhanced spin squeezing via quantum control

Collin M. Trail, Poul S. Jessen, Ivan H. Deutsch

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

We describe a new approach to spin squeezing based on a double-pass Faraday interaction between an optical probe and an optically dense atomic sample. A quantum eraser is used to remove residual spin-probe entanglement, thereby realizing a single-axis twisting unitary map on the collective spin. This interaction can be phase matched, resulting in exponential enhancement of squeezing as a function of optical density for times short compared to the decoherence time. In practice the scaling and peak squeezing depends on decoherence, technical loss, and noise. Including these imperfections, our model indicates that ∼10dB of squeezing should be achievable with laboratory parameters.

Original languageEnglish (US)
Article number193602
JournalPhysical review letters
Volume105
Issue number19
DOIs
StatePublished - Nov 4 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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