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
MetadataShow full item record
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.
DepartmentMassachusetts 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 Atoms
Physical Review Letters
American Physical Society
Zhang, Hao et al. “Collective State Measurement of Mesoscopic Ensembles with Single-Atom Resolution.” Physical Review Letters 109.13 (2012).
Final published version