Quantum-noise properties of matter-wave gap solitons

Ray-Kuang Lee, Elena A. Ostrovskaya, Yuri S. Kivshar, and Yinchieh Lai
Phys. Rev. A 72, 033607 – Published 9 September 2005

Abstract

We study quantum-noise squeezing and quantum correlations of gap solitons in a Bose-Einstein condensate loaded into a one-dimensional optical lattice. By employing a linearized quantum theory we find that quantum-noise squeezing of gap solitons, produced during their evolution, is enhanced compared with the atomic solitons in a lattice-free case due to intrasoliton structure of quantum correlations induced by the Bragg scattering in the periodic potential. We also show that nonlinear interaction of gap solitons in dynamically stable bound states can produce strong atom-number correlation between the soliton pairs.

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  • Received 6 April 2005

DOI:https://doi.org/10.1103/PhysRevA.72.033607

©2005 American Physical Society

Authors & Affiliations

Ray-Kuang Lee1,2,3, Elena A. Ostrovskaya1, Yuri S. Kivshar1, and Yinchieh Lai2

  • 1Nonlinear Physics Centre and ARC Centre of Excellence for Quantum-Atom Optics, Research School of Physical Sciences and Engineering, The Australian National University, Canberra, Australian Capital Territory 0200, Australia
  • 2Department of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University, Hsinchu 300, Taiwan
  • 3Department of Electrical Engineering and Institute of Photonics Technologies, National Tsing-Hua University, Hsinchu 300, Taiwan

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Issue

Vol. 72, Iss. 3 — September 2005

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