Entanglement with negative Wigner function of almost 3,000 atoms heralded by one photon

Robert McConnell, Hao Zhang, Jiazhong Hu, Senka Ćuk and Vladan Vuletić ()
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Robert McConnell: MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology
Hao Zhang: MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology
Jiazhong Hu: MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology
Senka Ćuk: MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology
Vladan Vuletić: MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology

Nature, 2015, vol. 519, issue 7544, 439-442

Abstract: The detection of a single photon from a laser interacting with an atomic ensemble is shown to produce entanglement of almost 3,000 atoms; in contrast to previous production of multi-atom entanglement, the highly non-classical nature of the present entangled state is verified by measurement of a negative quasiprobability distribution.

Date: 2015
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DOI: 10.1038/nature14293

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