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Extended Coherence Time on the Clock Transition of Optically Trapped Rubidium

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Authors:
  • Kleine Büning, G. ;
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    Leibniz Universität Hannover
  • Will, J. ;
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    Leibniz Universität Hannover
  • Ertmer, W. ;
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    Leibniz Universität Hannover
  • Rasel, E. ;
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    Leibniz Universität Hannover
  • Arlt, Jan ;
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    Department of Physics and Astronomy, Faculty of Science, Aarhus University, Aarhus University
  • Klempt, C. ;
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    Leibniz Universität Hannover
  • Ramirez-Martinez, F. ;
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    LNE-SYRTE, Observatoire de Paris
  • Piéchon, F. ;
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    Laboratoire de Physique des Solides
  • Rosenbusch, P.
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    LNE-SYRTE, Observatoire de Paris
DOI:
10.1103/PhysRevLett.106.240801
Abstract:
Optically trapped ensembles are of crucial importance for frequency measurements and quantum memories but generally suffer from strong dephasing due to inhomogeneous density and light shifts. We demonstrate a drastic increase of the coherence time to 21 s on the magnetic field insensitive clock transition of 87Rb by applying the recently discovered spin self-rephasing [C. Deutsch et al., Phys. Rev. Lett. 105, 020401 (2010)]. This result confirms the general nature of this new mechanism and thus shows its applicability in atom clocks and quantum memories. A systematic investigation of all relevant frequency shifts and noise contributions yields a stability of 2.4×10-11τ-1/2, where τ is the integration time in seconds. Based on a set of technical improvements, the presented frequency standard is predicted to rival the stability of microwave fountain clocks in a potentially much more compact setup.
Type:
Journal article
Language:
English
Published in:
Physical Review Letters, 2011, Vol 106, Issue 24
Main Research Area:
Science/technology
Publication Status:
Published
Review type:
Peer Review
Submission year:
2011
Scientific Level:
Scientific
ID:
231981522

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