Entanglement-assisted atomic clock beyond the projection noise limit

Anne Marie Marthe Louchet; Jürgen Appel; Jelmer Jan Renema; Daniel Oblak; Niels Kjærgaard; Eugene Simon Polzik

doi:10.1088/1367-2630/12/6/065032

Entanglement-assisted atomic clock beyond the projection noise limit

Anne Marie Marthe Louchet, Jürgen Appel, Jelmer Jan Renema, Daniel Oblak, Niels Kjærgaard, Eugene Simon Polzik

114 Citations (Scopus)

Abstract

We use a quantum non-demolition measurement to generate a spin squeezed state and to create entanglement in a cloud of 10⁵ cold cesium atoms. For the first time we operate an atomic clock improved by spin squeezing beyond the projection noise limit in a proof-of-principle experiment. For a clockinterrogation time of 10 μs, the experiments show an improvement of 1.1 dB in the signal-to-noise ratio, compared to the atomic projection noise limit.

Original language	English
Journal	New Journal of Physics
Volume	12
Issue number	6
Pages (from-to)	065032
ISSN	1367-2630
DOIs	https://doi.org/10.1088/1367-2630/12/6/065032
Publication status	Published - 28 Jun 2010

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abstract = "We use a quantum non-demolition measurement to generate a spin squeezed state and to create entanglement in a cloud of 105 cold cesium atoms. For the first time we operate an atomic clock improved by spin squeezing beyond the projection noise limit in a proof-of-principle experiment. For a clockinterrogation time of 10 μs, the experiments show an improvement of 1.1 dB in the signal-to-noise ratio, compared to the atomic projection noise limit.",

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AU - Louchet, Anne Marie Marthe

AU - Appel, Jürgen

AU - Renema, Jelmer Jan

AU - Oblak, Daniel

AU - Kjærgaard, Niels

AU - Polzik, Eugene Simon

PY - 2010/6/28

Y1 - 2010/6/28

N2 - We use a quantum non-demolition measurement to generate a spin squeezed state and to create entanglement in a cloud of 105 cold cesium atoms. For the first time we operate an atomic clock improved by spin squeezing beyond the projection noise limit in a proof-of-principle experiment. For a clockinterrogation time of 10 μs, the experiments show an improvement of 1.1 dB in the signal-to-noise ratio, compared to the atomic projection noise limit.

AB - We use a quantum non-demolition measurement to generate a spin squeezed state and to create entanglement in a cloud of 105 cold cesium atoms. For the first time we operate an atomic clock improved by spin squeezing beyond the projection noise limit in a proof-of-principle experiment. For a clockinterrogation time of 10 μs, the experiments show an improvement of 1.1 dB in the signal-to-noise ratio, compared to the atomic projection noise limit.

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DO - 10.1088/1367-2630/12/6/065032

M3 - Journal article

SN - 1367-2630

VL - 12

SP - 065032

JO - New Journal of Physics

JF - New Journal of Physics

IS - 6

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Entanglement-assisted atomic clock beyond the projection noise limit

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