Starts 24 Nov 2009 11:00

Ends 24 Nov 2009 20:00

Central European Time

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JOINT ICTP/SISSA STATISTICAL PHYSICS SEMINAR: "Bogoliubov Theory of acoustic Hawking radiation in Bose-Einstein Condensates"

Starts 24 Nov 2009 11:00

Ends 24 Nov 2009 20:00

Central European Time

ICTP

Leonardo da Vinci Building Seminar Room

Strada Costiera, 11
I - 34151 Trieste (Italy)

We apply the microscopic Bogoliubov theory of dilute Bose-Einstein condensates to analyze quantum and thermal fluctuations in a flowing atomic condensate in the presence of a sonic horizon. For the simplest case of a step-like horizon, closed-form analytical expressions are found for the spectral distribution of the analog Hawking radiation and for the density correlation function. The peculiar long-distance density correlations that appear as a consequence of the Hawking emission features turns out to be reinforced by a finite initial temperature of the condensate. The analytical results are in good quantitative agreement with first principle numerical calculations.