RT Journal Article
T1 Dynamical instability in kicked Bose-Einstein condensates
A1 Reslen, J.
A1 Creffield, Charles
A1 Monteiro, T. S.
AB Bose-Einstein condensates subject to short pulses  (kicks) from standing waves of light represent a nonlinear analog  of the well-known chaos paradigm, the quantum kicked rotor. Previous studies of the onset of dynamical instability  (i.e., exponential proliferation of noncondensate particles) suggested that the transition to instability might be associated with a transition to chaos. Here we conclude instead that instability is due to resonant driving of Bogoliubov modes. We investigate the Bogoliubov spectrum for both the quantum kicked rotor (QKR) and a variant, the double kicked rotor (QKR-2). We present an analytical model, valid in the limit of weak impulses which correctly gives the scaling properties of the resonances and yields good agreement with mean-field numerics.
PB American Physical Society
SN 1050-2947
YR 2004
FD 2004-04
LK https://hdl.handle.net/20.500.14352/51562
UL https://hdl.handle.net/20.500.14352/51562
LA eng
NO ©2008 The American Physical Society.J.R. acknowledges funding from EPSRC-DHPA. The authors would like to thank Simon Gardiner, Mark Raizen, and Chuanwei Zhang for valuable advice. This research was supported by the EPSRC.
NO EPSRC-DHPA
NO EPSRC
DS Docta Complutense
RD 19 dic 2025