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Atom-chip-based generation of entanglement for quantum metrology

Author

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  • Max F. Riedel

    (Fakultät für Physik, Ludwig-Maximilians-Universität, Schellingstraße 4, 80799 München, Germany
    Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany)

  • Pascal Böhi

    (Fakultät für Physik, Ludwig-Maximilians-Universität, Schellingstraße 4, 80799 München, Germany
    Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany)

  • Yun Li

    (Laboratoire Kastler Brossel, ENS, 24 rue Lhomond, F-75005 Paris, France
    State Key Laboratory of Precision Spectroscopy, East China Normal University)

  • Theodor W. Hänsch

    (Fakultät für Physik, Ludwig-Maximilians-Universität, Schellingstraße 4, 80799 München, Germany
    Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany)

  • Alice Sinatra

    (Laboratoire Kastler Brossel, ENS, 24 rue Lhomond, F-75005 Paris, France)

  • Philipp Treutlein

    (Fakultät für Physik, Ludwig-Maximilians-Universität, Schellingstraße 4, 80799 München, Germany
    Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany
    Departement Physik, Universität Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland)

Abstract

Quantum measurement in a tangle Atom interferometers, which rely on the wave properties of particles, are used in a variety of ultra-high-precision measurements, from determining the gravitational constant to defining the time standard. The precision of interferometers is generally limited by classical statistics, arising from the finite number of atoms used in the experiment. Two papers in this issue demonstrate the potential of 'spin-squeezing' in Bose–Einstein condensates (BECs) to facilitate measurements that are more precise than classical statistics allow. Using a specially prepared BEC as the input to an interferometer, Gross et al. beat the classical precision limit. In the second study, Riedel et al. create similar 'spin-squeezed' states in a BEC confined to an 'atom chip' by controlling elastic collisional interactions with a state-dependent potential. This demonstration of multi-particle entanglement on a chip raises the prospect of chip-based portable atomic clocks that also beat the classical precision limits.

Suggested Citation

  • Max F. Riedel & Pascal Böhi & Yun Li & Theodor W. Hänsch & Alice Sinatra & Philipp Treutlein, 2010. "Atom-chip-based generation of entanglement for quantum metrology," Nature, Nature, vol. 464(7292), pages 1170-1173, April.
    • Handle: RePEc:nat:nature:v:464:y:2010:i:7292:d:10.1038_nature08988
    DOI: 10.1038/nature08988
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    Cited by:

    1. Abouelkhir, N. & EL Hadfi, H. & Slaoui, A. & Ahl Laamara, R., 2023. "A simple analytical expression of quantum Fisher and Skew information and their dynamics under decoherence channels," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 612(C).

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