Continuous weak measurement and nonlinear dynamics in a cold spin ensemble

Greg A. Smith; Souma Chaudhury; Andrew Silberfarb; Ivan H. Deutsch; Poul S. Jessen

doi:10.1103/PhysRevLett.93.163602

Continuous weak measurement and nonlinear dynamics in a cold spin ensemble

Greg A. Smith, Souma Chaudhury, Andrew Silberfarb, Ivan H. Deutsch, Poul S. Jessen

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Abstract

The continuous weak measurement of cold spin in an ensemble of laser cooled Cs atoms was carried out using linear Faraday effect. It was showed that the probe light shift lead to nonlinearity in the spin dynamics which limited the Fraraday measurement window. A nonperturbing measurement on the much longer time scale set by decoherence was possible by removing the nonlinearity. The nonlinear spin Hamiltonian was found to be useful for the studies of quantum chaos and real-time quantum state estimation.

Original language	English (US)
Article number	163602
Pages (from-to)	163602-1-163602-4
Journal	Physical review letters
Volume	93
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.93.163602
State	Published - Oct 15 2004

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.93.163602

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abstract = "The continuous weak measurement of cold spin in an ensemble of laser cooled Cs atoms was carried out using linear Faraday effect. It was showed that the probe light shift lead to nonlinearity in the spin dynamics which limited the Fraraday measurement window. A nonperturbing measurement on the much longer time scale set by decoherence was possible by removing the nonlinearity. The nonlinear spin Hamiltonian was found to be useful for the studies of quantum chaos and real-time quantum state estimation.",

author = "Smith, {Greg A.} and Souma Chaudhury and Andrew Silberfarb and Deutsch, {Ivan H.} and Jessen, {Poul S.}",

note = "Funding Information: P. S. J. acknowledges the support of the National Science Foundation (PHY-0099582) and the Army Research Office (DAAD19-00-1-0375). I. H. D. was supported by the National Science Foundation (PHY-0099569) and the Office of Naval Research (N00014-03-1-0508).",

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AU - Smith, Greg A.

AU - Chaudhury, Souma

AU - Silberfarb, Andrew

AU - Deutsch, Ivan H.

AU - Jessen, Poul S.

N1 - Funding Information: P. S. J. acknowledges the support of the National Science Foundation (PHY-0099582) and the Army Research Office (DAAD19-00-1-0375). I. H. D. was supported by the National Science Foundation (PHY-0099569) and the Office of Naval Research (N00014-03-1-0508).

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N2 - The continuous weak measurement of cold spin in an ensemble of laser cooled Cs atoms was carried out using linear Faraday effect. It was showed that the probe light shift lead to nonlinearity in the spin dynamics which limited the Fraraday measurement window. A nonperturbing measurement on the much longer time scale set by decoherence was possible by removing the nonlinearity. The nonlinear spin Hamiltonian was found to be useful for the studies of quantum chaos and real-time quantum state estimation.

AB - The continuous weak measurement of cold spin in an ensemble of laser cooled Cs atoms was carried out using linear Faraday effect. It was showed that the probe light shift lead to nonlinearity in the spin dynamics which limited the Fraraday measurement window. A nonperturbing measurement on the much longer time scale set by decoherence was possible by removing the nonlinearity. The nonlinear spin Hamiltonian was found to be useful for the studies of quantum chaos and real-time quantum state estimation.

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Continuous weak measurement and nonlinear dynamics in a cold spin ensemble

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