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Opt Lett. 2013 Jul 15;38(14):2563-5. doi: 10.1364/OL.38.002563.

Ramsey spectroscopy with squeezed light.

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  • 1Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078, USA. k.qu@okstate.edu

Abstract

Traditional Ramsey spectroscopy has the frequency resolution 2π/T, where T is the time separation between two light fields. Using squeezed states and two-atom excitation joint detection, we present a new scheme achieving a higher resolution, π/T. We use two-mode squeezed light, which exhibits strong entanglement.

PMID:
23939112
[PubMed]
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