Continuous faraday measurement of a spinor BEC

L. D. Turner, S. Jung, A. T. Black, E. Gomez, P. D. Lett

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We report a continuousmeasurement of the spin state of a spinor BEC. A far off-resonant linearly polarised probe beam illuminates a sodium spinor condensate in F=1. The beam is Faraday rotated in proportion to the spin component along the beam propagation direction, and the rotation measured at the shot-noise limit with an autobalanced polarimeter. The measurement is minimallydestructive and continuous. As the condensate spin Larmor precesses in a weak magnetic bias field, the Faraday signal oscillates at the Larmor frequency, typically of order 50 kHz. We investigate this novel measurement for monitoring spin-mixing and decoherence processes in real time.

Original languageEnglish
Title of host publicationOptics InfoBase Conference Papers
Subtitle of host publicationQuantum-Atom Optics Downunder, QAO 2007; Wollongong; Australia; 3 December 2007 through 3 December 2007
Publication statusPublished - 1 Jan 2007
Externally publishedYes
EventQuantum-Atom Optics Downunder, QAO 2007 - Wollongong, Australia
Duration: 3 Dec 20073 Dec 2007

Publication series

NameOptics InfoBase Conference Papers


ConferenceQuantum-Atom Optics Downunder, QAO 2007

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