Article (Scientific journals)
Probing Quantum Speed Limits with Ultracold Gases
Del Campo Echevarria, Adolfo
2021In Physical Review Letters
Peer reviewed


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Abstract :
[en] Quantum speed limits (QSLs) rule the minimum time for a quantum state to evolve into a distinguishable state in an arbitrary physical process. These fundamental results constrain a notion of distance traveled by the quantum state, known as the Bures angle, in terms of the speed of evolution set by nonadiabatic energy fluctuations. I theoretically propose how to measure QSLs in an ultracold quantum gas confined in a timedependent harmonic trap. In this highly-dimensional system of continuous variables, quantum tomography is prohibited. Yet, QSLs can be probed whenever the dynamics is self-similar by measuring as a function of time the cloud size of the ultracold gas. This makes it possible to determine the Bures angle and energy fluctuations, as I discuss for various ultracold atomic systems.
Disciplines :
Author, co-author :
Del Campo Echevarria, Adolfo  ;  University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
External co-authors :
Language :
Title :
Probing Quantum Speed Limits with Ultracold Gases
Publication date :
07 May 2021
Journal title :
Physical Review Letters
Peer reviewed :
Peer reviewed
Focus Area :
Physics and Materials Science
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since 08 November 2021


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