Real-time quantum feedback control with cold alkali atoms

Geremia, J. M. (2007) Real-time quantum feedback control with cold alkali atoms. In: Quantum information with continuous variables of atoms and light. Imperial College Press , London, pp. 487-511. ISBN 978-1-86094-760-5 http://resolver.caltech.edu/CaltechAUTHORS:20100916-153749163

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Abstract

This chapter describes recent experiments involving continuous measurement and quantum feedback control of collective spin in a cloud of cold alkali atoms. While measurement by itself can generate entanglement between different atoms in the sample by virtue of conditional spin-squeezing, the squeezed state produced in any individual instance of the measurement is randomly distributed. Incorporating real-time feedback control into the observation process suppresses the statistical dispersion of the measurement outcome so that the same a posteriori state is achieved in every instance of the feedback-stabilized measurement.

Item Type:	Book Section
Additional Information:	© 2007 Imperial College Press. The experiment described here involves work by JMG, John K. Stockton and Hideo Mabuchi. Ramon van Handel has played an instrumental role in the theoretical analysis of the results, and we thank Howard Wiseman, Andrew Doherty, Poul Jessen, Ivan Deutsch and Andrew Silberfarb for many indispensable discussions over the past several years.
Record Number:	CaltechAUTHORS:20100916-153749163
Persistent URL:	http://resolver.caltech.edu/CaltechAUTHORS:20100916-153749163
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Usage Policy:	No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:	19993
Collection:	CaltechAUTHORS
Deposited By:	Tony Diaz
Deposited On:	16 Sep 2010 22:46
Last Modified:	26 Dec 2012 12:26

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