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29 March 2024
 
  » arxiv » 2005.6416

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Quantum speed limit for a thermal state after a quench
Oleg Lychkovskiy ;
Date 13 May 2020
AbstractQuantum speed limits are rigorous estimates on how fast a state of a quantum system can depart from the initial state in the course of quantum evolution. We derive a quantum speed limit for a system initially prepared in a thermal state and evolving after a quench of its Hamiltonian. This quantum speed limit exploits the structure of the thermal state and, in particular, explicitly depends on the temperature. As a consequence, it can be dramatically tighter than general quantum speed limits applied to thermal states.
Source arXiv, 2005.6416
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