Collective State Measurement of Mesoscopic Ensembles with Single-Atom Resolution
Author(s)
Zhang, Hao; McConnell, Robert P.; Cuk, Senka; Schleier-Smith, Monika H.; Leroux, Ian Daniel; Vuletic, Vladan; Lin, Qian, Ph. D. Massachusetts Institute of Technology; ... Show more Show less
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We demonstrate single-atom resolution, as well as detection sensitivity more than 20 dB below the quantum projection noise limit, for hyperfine-state-selective measurements on mesoscopic ensembles containing 100 or more atoms. The measurement detects the atom-induced shift of the resonance frequency of an optical cavity containing the ensemble. While spatially varying coupling of atoms to the cavity prevents the direct observation of a quantized signal, the demonstrated measurement resolution provides the readout capability necessary for atomic interferometry substantially below the standard quantum limit and down to the Heisenberg limit.
Date issued
2012-09Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Research Laboratory of Electronics; MIT-Harvard Center for Ultracold AtomsJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Zhang, Hao et al. “Collective State Measurement of Mesoscopic Ensembles with Single-Atom Resolution.” Physical Review Letters 109.13 (2012).
Version: Final published version
ISSN
0031-9007
1079-7114