Shortcut to Equilibration of an Open Quantum System

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Abstract
We present a procedure to accelerate the relaxation of an open quantum system towards its equilibrium state. The control protocol, termed the shortcut to equilibration, is obtained by reverse-engineering the nonadiabatic master equation. This is a nonunitary control task aimed at rapidly changing the entropy of the system. Such a protocol serves as a shortcut to an abrupt change in the Hamiltonian, i.e., a quench. As an example, we study the thermalization of a particle in a harmonic well. We observe that for short protocols the accuracy improves by 3 orders of magnitude.
Funding Information
  • Adams Fellowship Program of the Israel Academy of Sciences and Humanities
  • Israel Science Foundation (2244/14)
  • National Science Foundation (PHY-1748958)
  • Eusko Jaurlaritza (IT986-16)
  • Ministerio de Economía y Competitividad
  • Federación Española de Enfermedades Raras (FIS2015-67161-P)

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