Squeezing of Atomic Quantum Projection Noise

Patrick Joachim Windpassinger; Daniel Oblak; Ulrich Busk Hoff; Anne Marie Marthe Louchet; Jürgen Appel; Niels Kjærgaard; Eugene S. Polzik

doi:10.1080/09500340903033682

Squeezing of Atomic Quantum Projection Noise

Patrick Joachim Windpassinger, Daniel Oblak, Ulrich Busk Hoff, Anne Marie Marthe Louchet, Jürgen Appel, Niels Kjærgaard, Eugene S. Polzik

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We provide a framework for understanding recent experiments on squeezing of a collective atomic pseudospin, induced by a homodyne measurement on off-resonant probe light interrogating the atoms. The detection of light decimates the atomic state distribution and we discuss the conditions under which the resulting reduced quantum fluctuations are metrologically relevant. In particular, we consider a dual probe scheme which benefits from a cancelation of classical common mode noise sources such that quantum fluctuations from light and atoms are the main contributions to the detected signal.

Original language	English
Journal	Journal of Modern Optics
Volume	56
Issue number	18-19
Pages (from-to)	1993–1998
ISSN	0950-0340
DOIs	https://doi.org/10.1080/09500340903033682
Publication status	Published - 2009
Externally published	Yes

Keywords

Projection noise
Quantum noise squeezing
Quantum non-demolition measurement

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abstract = "We provide a framework for understanding recent experiments on squeezing of a collective atomic pseudospin, induced by a homodyne measurement on off-resonant probe light interrogating the atoms. The detection of light decimates the atomic state distribution and we discuss the conditions under which the resulting reduced quantum fluctuations are metrologically relevant. In particular, we consider a dual probe scheme which benefits from a cancelation of classical common mode noise sources such that quantum fluctuations from light and atoms are the main contributions to the detected signal.",

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AU - Windpassinger, Patrick Joachim

AU - Oblak, Daniel

AU - Hoff, Ulrich Busk

AU - Louchet, Anne Marie Marthe

AU - Appel, Jürgen

AU - Kjærgaard, Niels

AU - Polzik, Eugene S.

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N2 - We provide a framework for understanding recent experiments on squeezing of a collective atomic pseudospin, induced by a homodyne measurement on off-resonant probe light interrogating the atoms. The detection of light decimates the atomic state distribution and we discuss the conditions under which the resulting reduced quantum fluctuations are metrologically relevant. In particular, we consider a dual probe scheme which benefits from a cancelation of classical common mode noise sources such that quantum fluctuations from light and atoms are the main contributions to the detected signal.

AB - We provide a framework for understanding recent experiments on squeezing of a collective atomic pseudospin, induced by a homodyne measurement on off-resonant probe light interrogating the atoms. The detection of light decimates the atomic state distribution and we discuss the conditions under which the resulting reduced quantum fluctuations are metrologically relevant. In particular, we consider a dual probe scheme which benefits from a cancelation of classical common mode noise sources such that quantum fluctuations from light and atoms are the main contributions to the detected signal.

KW - Projection noise

KW - Quantum noise squeezing

KW - Quantum non-demolition measurement

U2 - 10.1080/09500340903033682

DO - 10.1080/09500340903033682

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JO - Journal of Modern Optics

JF - Journal of Modern Optics

SN - 0950-0340

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Squeezing of Atomic Quantum Projection Noise

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Keywords

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