"Cosmological" quasiparticle production in harmonically trapped superfluid gases

Details "Cosmological" quasiparticle production in harmonically trapped superfluid gases "Cosmological" quasiparticle production in harmonically trapped superfluid gases

2003-03-04

arxiv.org/abs/cond-mat/0303063v3

Phys.Rev. A69 (2004) 033602

Physics

Condensed Matter

Other Condensed Matter

8 pages, 1 figure; references updated, as published in Physical Review A

Scientific paper

10.1103/PhysRevA.69.033602

We show that a variety of cosmologically motivated effective quasiparticle space-times can be produced in harmonically trapped superfluid Bose and Fermi gases. We study the analogue of cosmological particle production in these effective space-times, induced by trapping potentials and coupling constants possessing an arbitrary time dependence. The WKB probabilities for phonon creation from the superfluid vacuum are calculated, and an experimental procedure to detect quasiparticle production by measuring density-density correlation functions is proposed.

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