Quantum noise of a Bose-Einstein condensate in an optical cavity, correlations, and entanglement

G. Szirmai, D. Nagy, and P. Domokos
Phys. Rev. A 81, 043639 – Published 29 April 2010

Abstract

A Bose-Einstein condensate of ultracold atoms inside the field of a laser-driven optical cavity exhibits dispersive optical bistability. We describe this system by using mean-field approximation and by analyzing the correlation functions of the linearized quantum fluctuations around the mean-field solution. The entanglement and the statistics of the atom-field quadratures are given in the stationary state. It is shown that the mean-field solution, that is, the Bose-Einstein condensate, is robust against entanglement generation for most of the phase diagram.

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  • Received 12 January 2010

DOI:https://doi.org/10.1103/PhysRevA.81.043639

©2010 American Physical Society

Authors & Affiliations

G. Szirmai1,2, D. Nagy1, and P. Domokos1

  • 1Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary
  • 2ICFO-Institut de Ciències Fotòniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain

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Issue

Vol. 81, Iss. 4 — April 2010

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