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Acoustic Analog to the Dynamical Casimir Effect in a Bose-Einstein Condensate

J.-C. Jaskula, G. B. Partridge, M. Bonneau, R. Lopes, J. Ruaudel, D. Boiron, and C. I. Westbrook
Phys. Rev. Lett. 109, 220401 – Published 26 November 2012
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Abstract

We have modulated the density of a trapped Bose-Einstein condensate by changing the trap stiffness, thereby modulating the speed of sound. We observe the creation of correlated excitations with equal and opposite momenta, and show that for a well-defined modulation frequency, the frequency of the excitations is half that of the trap modulation frequency.

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  • Received 5 July 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.220401

© 2012 American Physical Society

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Published 26 November 2012

An analog of the dynamical Casimir effect has been achieved, where phonons replace photons and thermal fluctuations replace vacuum fluctuations.

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Authors & Affiliations

J.-C. Jaskula*, G. B. Partridge, M. Bonneau, R. Lopes, J. Ruaudel, D. Boiron, and C. I. Westbrook

  • Laboratoire Charles Fabry, Institut d’Optique, CNRS, Université Paris-Sud, 2 avenue Augustin Fresnel, 91127 Palaiseau, France

  • *Present address: Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA.
  • Present address: Agilent Laboratories, Santa Clara, CA 95051, USA.

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Issue

Vol. 109, Iss. 22 — 30 November 2012

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