Phys. Rev. A 69, 033602 (2004) [8 pages]“Cosmological” quasiparticle production in harmonically trapped superfluid gasesSee Also: Publisher's Note Received 9 September 2003; published 8 March 2004; corrected 15 March 2004 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 analog 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.69.033602
DOI:
10.1103/PhysRevA.69.033602
PACS:
03.75.Kk, 98.80.Es
See AlsoPublisher's Note: Petr O. Fedichev and Uwe R. Fischer, Publisher's Note: “Cosmological” quasiparticle production in harmonically trapped superfluid gases [Phys. Rev. A 69, 033602 (2004)], Phys. Rev. A 69, 049902 (2004). |
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