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Strategies for real-time position control of a single atom in cavity QED

Lynn, T. W. and Birnbaum, K. and Kimble, H. J. (2005) Strategies for real-time position control of a single atom in cavity QED. Journal of Optics B: Quantum and Semiclassical Optics, 7 (10). S215-S225. ISSN 1464-4266. doi:10.1088/1464-4266/7/10/004.

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Recent realizations of single-atom trapping and tracking in cavity QED open the door for feedback schemes which actively stabilize the motion of a single atom in real time. We present feedback algorithms for cooling the radial component of motion for a single atom trapped by strong coupling to single-photon fields in an optical cavity. Performance of various algorithms is studied through simulations of single-atom trajectories, with full dynamical and measurement noise included. Closed loop feedback algorithms compare favourably to open loop 'switching' analogues, demonstrating the importance of applying actual position information in real time. The high optical information rate in current experiments enables real-time tracking that approaches the standard quantum limit for broadband position measurements, suggesting that realistic active feedback schemes may reach a regime where measurement backaction appreciably alters the motional dynamics.

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Additional Information:© 2005 Institute of Physics. Received 11 March 2005, accepted for publication 2 August 2005, Published 14 September 2005, Print publication: Issue 10 (October 2005) We gratefully acknowledge the contributions of many colleagues, including Joseph Buck, Dong Eui Chang, Domitilla del Vecchio, Andrew Doherty, Martha Gallivan, Christina Hood, Ron Legere, Jason McKeever, Dominic Schrader, and Jun Ye. This work has been funded by the National Science Foundation.
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Subject Keywords:quantum optics, cavity QED, atom cooling and trapping
Issue or Number:10
Record Number:CaltechAUTHORS:LYNjob05
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2385
Deposited By: Archive Administrator
Deposited On:02 Apr 2006
Last Modified:12 Jul 2022 19:43

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