Unitary cavity spin squeezing by quantum erasure
Name
Leroux-2012-In situ measurements of the optical absorption.pdf
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572.01 KB
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Checksum (MD5)
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Author(s)
Leroux, Ian Daniel
Schleier-Smith, Monika Helene
Zhang, Hao
Vuletic, Vladan
Date Issued
January 2012
Journal
Physical Review A
Publisher
American Physical Society (APS)
Citation
Leroux, Ian et al. “Unitary Cavity Spin Squeezing by Quantum Erasure.” Physical Review A 85.1 (2012): n. pag. Web. 2 Mar. 2012. © 2011 American Physical Society
Version
Final published version
Abstract
Deterministic light-induced spin squeezing in an atomic gas is limited by photon shot noise or, equivalently, by atomic state information escaping with the light field mediating the effective atom-atom interaction. We show theoretically that the performance of cavity spin squeezing [ M. H. Schleier-Smith, I. D. Leroux and V. Vuletić Phys. Rev. A 81 021804 (2010)] can be substantially improved by erasing the light-atom entanglement, and propose several methods for doing so. Accounting for light scattering into free space, quantum erasure improves the scaling of cavity squeezing from S[superscript −1/2] to S[superscript −2/3], where S is the total atomic spin.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
MIT-Harvard Center for Ultracold Atoms
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevA.85.013803
