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SUMMARY:Bogoliubov theory of acoustic Hawking radiation in Bose-Einstein c
 ondensates - Dr Alessio Recati\, University of Trento\, Italy
DTSTART:20100304T141500Z
DTEND:20100304T154500Z
UID:TALK22835@talks.cam.ac.uk
CONTACT:Joe Bhaseen
DESCRIPTION:We apply the microscopic Bogoliubov theory of dilute Bose-Eins
 tein condensates to analyze quantum and thermal fluctuations in a flowing 
 atomic condensate in the presence of a sonic horizon. For the simplest cas
 e of a step-like horizon\, closed-form analytical expressions are found fo
 r the spectral distribution of the analog Hawking radiation and for the de
 nsity correlation function. The peculiar long-distance density correlation
 s that appear as a consequence of the Hawking emission features turns out 
 to be reinforced by a finite initial temperature of the condensate. The an
 alytical results are in good quantitative agreement with first principle n
 umerical calculations. 
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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