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Open Quantum Systems Decoherence
Quantum Simulation
Fast transitionless expansions of cold atoms in optical Gaussian beam traps
arXiv
Authors: E. Torrontegui, Xi Chen, M. Modugno, A. Ruschhaupt, D. Guéry-Odelin, J. G. Muga
Year
2011
Paper ID
28954
Status
Preprint
Abstract Read
~2 min
Abstract Words
73
Citations
N/A
Abstract
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.
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- We study fast expansions of cold atoms in a three-dimensional Gaussian-beam optical trap.
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