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Quantum-measurement backaction from a Bose-Einstein condensate coupled to a mechanical oscillator

Steinke, S. K. and Singh, S. and Tasgin, M. E. and Meystre, P. and Schwab, K. C. and Vengalattore, M. (2011) Quantum-measurement backaction from a Bose-Einstein condensate coupled to a mechanical oscillator. Physical Review A, 84 (2). Art. No. 023841. ISSN 1050-2947.

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We study theoretically the dynamics of a hybrid optomechanical system consisting of a macroscopic mechanical membrane magnetically coupled to a spinor Bose-Einstein condensate via a nanomagnet attached at the membrane center. We demonstrate that this coupling permits us to monitor indirectly the center-of-mass position of the membrane via measurements of the spin of the condensed atoms. These measurements normally induce a significant backaction on the membrane motion, which we quantify for the cases of thermal and coherent initial states of the membrane. We discuss the possibility of measuring this quantum backaction via repeated measurements. We also investigate the potential to generate nonclassical states of the membrane, in particular Schrödinger-cat states, via such repeated measurements.

Item Type:Article
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Schwab, K. C.0000-0001-8216-4815
Additional Information:© 2011 American Physical Society. Received 9 May 2011; published 25 August 2011. We thank David Brown for his help during the initial stages of these calculations. This work was supported by the DARPA QuASAR program through a Grant from AFOSR and the DARPA-ORCHID program through a Grant from ARO, the US Army Research Office, and the NSF. M.V. acknowledges support from the Alfred P. Sloan Foundation. MET is supported by TUBITAK (the Scientific and Technological Research Council of Turkey).
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)UNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (TÜBİTAK)UNSPECIFIED
Issue or Number:2
Classification Code:PACS: 42.50.Lc, 42.50.Wk, 37.30.+i, 07.10.Cm
Record Number:CaltechAUTHORS:20110912-085804452
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25290
Deposited By: Tony Diaz
Deposited On:12 Sep 2011 16:20
Last Modified:03 Oct 2019 03:04

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