Quantum-noise properties of matter-wave gap solitons

Ray Kuang Lee*, Elena A. Ostrovskaya, Yuri S. Kivshar, Yin-Chieh Lai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


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.

Original languageEnglish
Article number033607
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number3
StatePublished - 1 Sep 2005

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