Shortcut to Equilibration of an Open Quantum System

We present a procedure to accelerate the relaxation of an open quantum system towards its equilibrium state. The control protocol, termed Shortcut to Equilibration, is obtained by reverse-engineering the non-adiabatic master equation. This is a non-unitary control task aimed at rapidly changing the...

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Bibliographic Details
Published in:arXiv.org 2019-02
Main Authors: Dann, Roie, Ander Tobalina, Kosloff, Ronnie
Format: Article
Language:English
Subjects:
Balancing
Particle decay
Quantum theory
Reverse engineering
Thermalization (energy absorption)
Online Access:Get full text
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Summary:We present a procedure to accelerate the relaxation of an open quantum system towards its equilibrium state. The control protocol, termed Shortcut to Equilibration, is obtained by reverse-engineering the non-adiabatic master equation. This is a non-unitary 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 there is a three orders of magnitude improvement in accuracy.
ISSN:2331-8422
DOI:10.48550/arxiv.1812.08821