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Global phase space of coherence and entanglement in a double-well Bose-Einstein condensate

Holger Hennig, Dirk Witthaut, and David K. Campbell
Phys. Rev. A 86, 051604(R) – Published 12 November 2012
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Abstract

Ultracold atoms provide an ideal system for the realization of quantum technologies but also for the study of fundamental physical questions such as the emergence of decoherence and classicality in quantum many-body systems. Here, we study the global structure of the quantum dynamics of bosonic atoms in a double-well trap based upon the Bose-Hubbard Hamiltonian and analyze the conditions for the generation of many-particle entanglement and spin squeezing which have important applications in quantum metrology. We show how the quantum dynamics is determined by the phase-space structure of the associated mean-field system and where true quantum features arise beyond this “classical” approximation.

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  • Received 4 June 2012

DOI:https://doi.org/10.1103/PhysRevA.86.051604

©2012 American Physical Society

Authors & Affiliations

Holger Hennig1, Dirk Witthaut2, and David K. Campbell3

  • 1Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
  • 2Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Göttingen, Germany
  • 3Department of Physics, Boston University, Boston, Massachusetts 02215, USA

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Issue

Vol. 86, Iss. 5 — November 2012

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