%0 Journal Article %1 Zhang2012Collective %A Zhang, Hao %A McConnell, Robert %A Ćuk, Senka %A Lin, Qian %A Schleier Smith, Monika H. %A Leroux, Ian D. %A Vuletić, Vladan %D 2012 %I American Physical Society %J Physical Review Letters %K collective, ensembles, jclubdone, rydberg, single-atom %P 133603+ %R 10.1103/physrevlett.109.133603 %T Collective State Measurement of Mesoscopic Ensembles with Single-Atom Resolution %U http://dx.doi.org/10.1103/physrevlett.109.133603 %V 109 %X 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.

@article{Zhang2012Collective, abstract = {{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.}}, added-at = {2019-02-26T15:22:34.000+0100}, author = {Zhang, Hao and McConnell, Robert and \'{C}uk, Senka and Lin, Qian and Schleier Smith, Monika H. and Leroux, Ian D. and Vuleti\'{c}, Vladan}, biburl = {https://www.bibsonomy.org/bibtex/2460ef9d14f629d90e80d1b4d1d974775/rspreeuw}, citeulike-article-id = {11335103}, citeulike-linkout-0 = {http://dx.doi.org/10.1103/physrevlett.109.133603}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRL/v109/i13/e133603}, citeulike-linkout-2 = {http://link.aps.org/pdf/PRL/v109/i13/e133603}, doi = {10.1103/physrevlett.109.133603}, interhash = {c02a3e2f8c816593ad41b2abdd896627}, intrahash = {460ef9d14f629d90e80d1b4d1d974775}, journal = {Physical Review Letters}, keywords = {collective, ensembles, jclubdone, rydberg, single-atom}, month = sep, pages = {133603+}, posted-at = {2012-10-02 09:01:01}, priority = {2}, publisher = {American Physical Society}, timestamp = {2019-02-26T15:22:34.000+0100}, title = {{Collective State Measurement of Mesoscopic Ensembles with Single-Atom Resolution}}, url = {http://dx.doi.org/10.1103/physrevlett.109.133603}, volume = 109, year = 2012 }