High-Temperature Nonequilibrium Bose Condensation Induced by a Hot Needle

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Alexander Schnell - , Max-Planck-Institut für Physik komplexer Systeme (Autor:in)
  • Daniel Vorberg - , Max-Planck-Institut für Physik komplexer Systeme (Autor:in)
  • Roland Ketzmerick - , Professur für Computational Physics, Max-Planck-Institut für Physik komplexer Systeme (Autor:in)
  • André Eckardt - , Max-Planck-Institut für Physik komplexer Systeme (Autor:in)

Abstract

We investigate theoretically a one-dimensional ideal Bose gas that is driven into a steady state far from equilibrium via the coupling to two heat baths: a global bath of temperature T and a "hot needle," a bath of temperature Th T with localized coupling to the system. Remarkably, this system features a crossover to finite-size Bose condensation at temperatures T that are orders of magnitude larger than the equilibrium condensation temperature. This counterintuitive effect is explained by a suppression of long-wavelength excitations resulting from the competition between both baths. Moreover, for sufficiently large needle temperatures ground-state condensation is superseded by condensation into an excited state, which is favored by its weaker coupling to the hot needle. Our results suggest a general strategy for the preparation of quantum degenerate nonequilibrium steady states with unconventional properties and at large temperatures.

Details

OriginalspracheEnglisch
Aufsatznummer140602
FachzeitschriftPhysical review letters
Jahrgang119
Ausgabenummer14
PublikationsstatusVeröffentlicht - 4 Okt. 2017
Peer-Review-StatusJa

Externe IDs

PubMed 29053292

Schlagworte

ASJC Scopus Sachgebiete

Bibliotheksschlagworte