RT Journal Article
T1 Coherent ratchets in driven Bose-Einstein condensates
A1 Creffield, Charles
A1 Sols Lucía, Fernando
AB We study the response of a Bose-Einstein condensate to an unbiased periodic driving potential. By controlling the space and time symmetries of the driving we show how a directed current can be induced, producing a coherent quantum ratchet. Weak driving induces a regular behavior, and space and time symmetries must both be broken to produce a current. For strong driving, the behavior becomes chaotic and the resulting effective irreversibility means that it is unnecessary to explicitly break time symmetry. Spatial asymmetry alone is then sufficient to produce the ratchet effect, even in the absence of interactions, and although the system remains completely coherent
PB American Physical Society
SN 0031-9007
YR 2009
FD 2009-11-13
LK https://hdl.handle.net/20.500.14352/44737
UL https://hdl.handle.net/20.500.14352/44737
LA eng
NO © 2009 The American Physical Society.This work was supported by MICINN (Spain) through Grant No. FIS-2007-65723 and the Ramón y Cajal Program (CEC). The authors thank Ferruccio Renzoni,Tania Monteiro, and Peter Reimann for stimulating discussions.
NO MICINN (Spain)
NO Ramón y Cajal Program (CEC)
DS Docta Complutense
RD 6 abr 2025