235 citations · 486 across the 5 of their papers we have counts for
5 papers
Observer dependence for the phonon content of the sound field living on the effective curved space-time background of a Bose-Einstein condensate
Petr O. Fedichev, Uwe R. Fischer
We demonstrate that the ambiguity of the particle content for quantum fields in a generally curved space-time can be experimentally investigated in an ultracold gas of atoms formin…
Gibbons-Hawking Effect in the Sonic de Sitter Space-Time of an Expanding Bose-Einstein-Condensed Gas
Petr O. Fedichev, Uwe R. Fischer
We propose an experimental scheme to observe the Gibbons-Hawking effect in the acoustic analog of a 1+1-dimensional de Sitter universe, produced in an expanding, cigar-shaped Bose-…
"Cosmological" quasiparticle production in harmonically trapped superfluid gases
Petr O. Fedichev, Uwe R. Fischer
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 analogu…
Dissipative spin-boson model and Kondo effect in low dimensional quantum gases
A. Recati, P. O. Fedichev, W. Zwerger +2
We show that ultracold atoms confined in a quasi-1d trap can be used to study the dissipative spin-boson model with {\it tunable} tunneling splitting and strength of dissipation. I…
Vortex liquids and vortex quantum Hall states in trapped rotating Bose gases
Uwe R. Fischer, Petr O. Fedichev, Alessio Recati
We discuss the feasibility of quantum Hall states of vortices in trapped low-density two-dimensional Bose gases with large particle interactions. For interaction strengths larger t…