Chiral prethermalization in supersonically split condensates

Kartiek Agarwal, Emanuele G.Dalla Torre, Bernhard Rauer, Tim Langen, Jörg Schmiedmayer, Eugene Demler

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Abstract

We study the dynamics of phase relaxation between a pair of one-dimensional condensates created by a supersonic unzipping of a single condensate. We use the Lorentz invariance of the low energy sector of such systems to show that dephasing results in an unusual prethermal state, in which right- and left-moving excitations have different, Doppler-shifted temperatures. The chirality of these modes can be probed experimentally by measuring the interference fringe contrasts with the release point of the split condensates moving at another supersonic velocity. Further, an accelerated motion of the release point can be used to observe a spacelike analog of the Unruh effect. A concrete experimental realization of the quantum zipper for a BEC of trapped atoms on an atom chip is outlined.

Original languageEnglish
Article number190401
JournalPhysical Review Letters
Volume113
Issue number19
DOIs
StatePublished - 4 Nov 2014
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2014 American Physical Society.

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