Reference : Delta-kick cooling, time-optimal control of scale-invariant dynamics, and shortcuts t...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/48701
Delta-kick cooling, time-optimal control of scale-invariant dynamics, and shortcuts to adiabaticity assisted by kicks
English
Dupays, Léonce mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
Spierings, David C. [Centre for Quantum Information and Quantum Control, Department of Physics, University of Toronto, Toronto, Ontario M5S 1A7, Canada]
Steinberg, Aephraim M. [Centre for Quantum Information and Quantum Control, Department of Physics, University of Toronto, Toronto, Ontario M5S 1A7, Canada]
Del Campo Echevarria, Adolfo mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
17-Sep-2021
Physical Review Research
Yes
International
[en] Delta-kick cooling (DKC) is used to compress the momentum distribution of ultracold quantum matter. It combines expansion dynamics with the use of kick pulses, designed via classical methods, that bring the system to rest.We introduce an exact approach to DKC for arbitrary scale-invariant dynamics of quantum gases, lifting the original restrictions to free evolution and noninteracting systems, to account for the control of atomic clouds in a time-dependent harmonic trap that can be either repulsive (inverted) or confining. We show that DKC assisted by a repulsive potential outperforms the conventional scheme, and that sudden trap-frequency quenches combined with DKC are equivalent to time-optimal bang-bang protocols.We further show that reverse engineering of the scale-invariant dynamics under smooth trap-frequency modulations can be combined with DKC to introduce a new class of shortcuts to adiabaticity assisted by kicks.
http://hdl.handle.net/10993/48701
10.1103/PhysRevResearch.3.033261

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