Protocol for Precise Field Sensing in the Optical Domain with Cold Atoms in a Cavity.
Phys Rev Lett
; 124(19): 193602, 2020 May 15.
Article
em En
| MEDLINE
| ID: mdl-32469538
ABSTRACT
In the context of quantum metrology, optical cavity-QED platforms have primarily been focused on the generation of entangled atomic spin states useful for next-generation frequency and time standards. Here, we report a complementary application the use of optical cavities to generate nonclassical states of light for electric field sensing below the standard quantum limit. We show that cooperative atom-light interactions in the strong collective coupling regime can be used to engineer generalized atom-light cat states which enable quantum enhanced sensing of small displacements of the cavity field even in the presence of photon loss. We demonstrate that metrological gains of 10-20 dB below the standard quantum limit are within reach for current cavity-QED systems operating with long-lived alkaline-earth atoms.
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MEDLINE
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En
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2020
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Article