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Controlled collisions for multi-particle entanglement of optically trapped atoms

Author

Listed:
  • Olaf Mandel

    (Ludwig-Maximilians-Universität
    the Max-Planck-Institut für Quantenoptik)

  • Markus Greiner

    (Ludwig-Maximilians-Universität
    the Max-Planck-Institut für Quantenoptik)

  • Artur Widera

    (Ludwig-Maximilians-Universität
    the Max-Planck-Institut für Quantenoptik)

  • Tim Rom

    (Ludwig-Maximilians-Universität
    the Max-Planck-Institut für Quantenoptik)

  • Theodor W. Hänsch

    (Ludwig-Maximilians-Universität
    the Max-Planck-Institut für Quantenoptik)

  • Immanuel Bloch

    (Ludwig-Maximilians-Universität
    the Max-Planck-Institut für Quantenoptik)

Abstract

Entanglement lies at the heart of quantum mechanics, and in recent years has been identified as an essential resource for quantum information processing and computation1,2,3,4. The experimentally challenging production of highly entangled multi-particle states is therefore important for investigating both fundamental physics and practical applications. Here we report the creation of highly entangled states of neutral atoms trapped in the periodic potential of an optical lattice. Controlled collisions between individual neighbouring atoms are used to realize an array of quantum gates, with massively parallel operation. We observe a coherent entangling–disentangling evolution in the many-body system, depending on the phase shift acquired during the collision between neighbouring atoms. Such dynamics are indicative of highly entangled many-body states; moreover, these are formed in a single operational step, independent of the size of the system5,6.

Suggested Citation

  • Olaf Mandel & Markus Greiner & Artur Widera & Tim Rom & Theodor W. Hänsch & Immanuel Bloch, 2003. "Controlled collisions for multi-particle entanglement of optically trapped atoms," Nature, Nature, vol. 425(6961), pages 937-940, October.
    • Handle: RePEc:nat:nature:v:425:y:2003:i:6961:d:10.1038_nature02008
    DOI: 10.1038/nature02008
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    Cited by:

    1. Barrios, Alan J. & Valdés-Hernández, Andrea & Sevilla, Francisco J., 2022. "Dynamics of mode entanglement induced by particle-tunneling in the extended Bose–Hubbard dimer model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 600(C).

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