RT Journal Article
T1 Fast transitionless expansions of cold atoms in optical Gaussian-beam traps
A1 Torrontegui Muñoz, Erik
A1 Chen, Xi
A1 Modugno, Michelle
A1 Ruschhaupt, Andreas
A1 Guéry-Odelin, David
A1 Muga, Juan Gonzalo
AB We study fast expansions of cold atoms in a three-dimensional Gaussian-beam optical trap. Three different methods to avoid final motional excitation are compared: inverse engineering using Lewis-Riesenfeld invariants, which provides the best overall performance, a bang-bang approach, and a fast adiabatic approach. We analyze the excitation effect of anharmonic terms, radial-longitudinal coupling, and radial-frequency mismatch. In the inverse-engineering approach these perturbations can be suppressed or mitigated by increasing the laser beam waist.
PB American Physical Society
SN 1050-2947
YR 2012
FD 2012-03
LK https://hdl.handle.net/10016/32178
UL https://hdl.handle.net/10016/32178
LA eng
NO We thank G. C. Hegerfeldt for useful discussions. We acknowledge funding by the Basque government (Grant No. IT472-10), Ministerio de Ciencia e Innovación (Grant No. FIS2009-12773-C02-01), and the UPV/EHU under program UFI 11/55. X.C. thanks the Juan de la Cierva Programme, the National Natural Science Foundation of China (Grants No. 60806041 and No. 61176118), and the Shanghai Leading Academic Discipline Program (Grant No. S30105); E.T. thanks the Basque government (Grant No. BFI08.151); and D.G.O. thanks the Agence National de la Recherche, the Région Midi-Pyrénées, University Paul Sabatier (OMASYC project), and the Institut Universitaire de France.
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RD 27 jul. 2024