Article (Scientific journals)
Delta-kick cooling, time-optimal control of scale-invariant dynamics, and shortcuts to adiabaticity assisted by kicks
Dupays, Léonce; Spierings, David C.; Steinberg, Aephraim M. et al.
2021In Physical Review Research
Peer reviewed
 

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Abstract :
[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.
Disciplines :
Physics
Author, co-author :
Dupays, Léonce ;  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  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
External co-authors :
yes
Language :
English
Title :
Delta-kick cooling, time-optimal control of scale-invariant dynamics, and shortcuts to adiabaticity assisted by kicks
Publication date :
17 September 2021
Journal title :
Physical Review Research
Peer reviewed :
Peer reviewed
Focus Area :
Physics and Materials Science
Available on ORBilu :
since 25 November 2021

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