2003/03/31 by Petr O. Fedichev, Uwe R. Fischer · 4 citations
Physics and Astronomy · #cond-mat.other #gr-qc
paper · pdf · doi:10.1103/physreva.69.033602
published as Phys.Rev. A69 (2004) 033602 · 8 pages, 1 figure; references updated, as published in Physical Review A
arxiv created 2004/03/10 · arxiv updated 2009/11/30
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.