Generating entangled spin states for quantum metrology by single-photon detection
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McConnell-2013-Generating entangled spin.pdf
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Author(s)
Zhang, Hao
Schleier-Smith, Monika
McConnell, Robert P.
Cuk, Senka
Vuletic, Vladan
Hu, Jiazhong, Ph. D. Massachusetts Institute of Technology
Date Issued
December 2013
Journal
Physical Review A
Publisher
American Physical Society
Citation
McConnell, Robert, Hao Zhang, Senka Ćuk, Jiazhong Hu, Monika Schleier-Smith, and Vladan Vuletić. “Generating Entangled Spin States for Quantum Metrology by Single-Photon Detection.” Phys. Rev. A 88, no. 6 (December 2013). © 2013 American Physical Society
Version
Final published version
Abstract
We propose and analyze a probabilistic but heralded scheme to generate pure, entangled, non-Gaussian states of collective spin in large atomic ensembles by means of single-photon detection. One photon announces the preparation of a Dicke state, while two or more photons announce Schrödinger cat states. The method produces pure states even for finite photon detection efficiency and weak atom-photon coupling. The entanglement generation can be made quasideterministic by means of repeated trial and feedback, enabling metrology beyond the standard quantum limit.
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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DOI of Published Version
https://doi.org/10.1103/PhysRevA.88.063802
