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Kapitza stabilization of a repulsive Bose-Einstein condensate in an oscillating optical lattice
Martin, John; Georgeot, Bertrand; Guéry-Odelin, David et al.
2019
 

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Abstract :
[en] The striking example of the inverted pendulum (or Kapitza pendulum) shows that an oscillating force with zero average can lead to the phenomenon of Kapitza stabilization, with transformation of an unstable fixed point into a stable one. In this work, we show that the Kapitza stabilization can occur in the context of nonlinear quantum fields. Through this phenomenon, an amplitude-modulated optical lattice can stabilize a Bose-Einstein condensate (BEC) with repulsive interactions and prevent the spreading for long times. We present a classical and quantum analysis in the framework of Gross-Pitaevskii equation (GPE). We specify the parameter region where stabilization occurs. Effects of nonlinearity lead to a significant increase of the stability domain compared with the classical case. Our theoretical proposal can be experimentally realized with current cold atom technology. Besides its fundamental interest, it should provide new tools for the long-time manipulation of BECs.
Disciplines :
Physics
Author, co-author :
Martin, John  ;  Université de Liège - ULiège > Département de physique > Optique quantique
Georgeot, Bertrand;  Laboratoire de Physique Théorique, IRSAMC, Université de Toulouse, CNRS, UPS, France
Guéry-Odelin, David;  Laboratoire Collisions, Agrégats, Réactivité, IRSAMC, Université de Toulouse, CNRS, UPS, France
Shepelyansky, Dima;  Laboratoire de Physique Théorique, IRSAMC, Université de Toulouse, CNRS, UPS, France
Language :
English
Title :
Kapitza stabilization of a repulsive Bose-Einstein condensate in an oscillating optical lattice
Publication date :
August 2019
Event name :
Optics Division Seminar
Event organizer :
University of Strathclyde
Event place :
Glasgow, United Kingdom
Event date :
26-08-2019
Audience :
International
Available on ORBi :
since 03 December 2020

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