RT Journal Article
T1 Weakly driven quantum coherent ratchets in cold-atom systems
A1 Heimsoth, M.
A1 Creffield, Charles
A1 Sols Lucía, Fernando
AB We present an analytical study of the response of cold atoms in an optical lattice to a weak time- and space-asymmetric periodic driving signal. In the noninteracting limit, and for a finite set of resonant frequencies, we show how a coherent, long-lasting ratchet current results from the interference between first- and second-order processes. In those cases, a suitable three- level model can account for the entire dynamics, yielding surprisingly good agreement with numerically exact results for weak and moderately strong driving.
PB American Physical Society
SN 1050-2947
YR 2010
FD 2010-08-12
LK https://hdl.handle.net/20.500.14352/44731
UL https://hdl.handle.net/20.500.14352/44731
LA eng
NO ©2010 The American Physical Society.This work was supported by MICINN (Spain), through Grant No. FIS-2007-65723 and the Ramón y Cajal Program (CEC).
NO MICINN, Spain
NO Ramón y Cajal Program (CEC)
DS Docta Complutense
RD 6 abr 2025