An acoustic analog to the dynamical Casimir effect in a Bose-Einstein condensate
Jean-Christophe Jaskula (LCF), Guthrie B. Partridge (LCF), Marie, Bonneau (LCF), Rapha\"el Lopes (LCF), Josselin Ruaudel (LCF), Denis Boiron, (LCF), Christoph I Westbrook (LCF)
TL;DR
This paper demonstrates an acoustic analog of the dynamical Casimir effect using a Bose-Einstein condensate, showing correlated excitation creation and frequency relationships through trap modulation.
Contribution
It introduces a novel experimental realization of the dynamical Casimir effect analog in a Bose-Einstein condensate by modulating trap stiffness.
Findings
Creation of correlated excitations with opposite momenta
Excitations' frequency is half the modulation frequency
Observation of the effect confirms theoretical predictions
Abstract
We have realized an acoustic analog to the Dynamical Casimir effect. The density of a trapped Bose-Einstein condensate is modulated by changing the trap stiffness. 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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