Quantum thermalization via multiwave mixing

Jukka P. Pekola; Bayan Karimi

doi:10.1103/PhysRevResearch.6.L042023

Quantum thermalization via multiwave mixing

Jukka P. Pekola, Bayan Karimi

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Abstract

We discuss thermalization in a multimode quantum cavity under unitary evolution. According to general principles, an isolated system with quadratic couplings does not exhibit thermalization. However, we find that nonlinearities, here three-wave perturbation, typical for instance in superconducting Josephson systems, may lead to thermalization into a Bose-Einstein distribution of occupations of the modes. The temperature of this state is dictated by energy conservation in this closed system, and the thermal distribution is robust against weak disturbances. We discuss how our findings open up new avenues to experimentally probe fundamental assumptions of statistical physics in solid-state systems.

Original language	English
Article number	L042023
Pages (from-to)	1-5
Number of pages	5
Journal	PHYSICAL REVIEW RESEARCH
Volume	6
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevResearch.6.L042023
Publication status	Published - 24 Oct 2024
MoE publication type	A1 Journal article-refereed

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Quantum thermalization via multiwave mixingFinal published version, 539 KBLicence: CC BY

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abstract = "We discuss thermalization in a multimode quantum cavity under unitary evolution. According to general principles, an isolated system with quadratic couplings does not exhibit thermalization. However, we find that nonlinearities, here three-wave perturbation, typical for instance in superconducting Josephson systems, may lead to thermalization into a Bose-Einstein distribution of occupations of the modes. The temperature of this state is dictated by energy conservation in this closed system, and the thermal distribution is robust against weak disturbances. We discuss how our findings open up new avenues to experimentally probe fundamental assumptions of statistical physics in solid-state systems.",

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N2 - We discuss thermalization in a multimode quantum cavity under unitary evolution. According to general principles, an isolated system with quadratic couplings does not exhibit thermalization. However, we find that nonlinearities, here three-wave perturbation, typical for instance in superconducting Josephson systems, may lead to thermalization into a Bose-Einstein distribution of occupations of the modes. The temperature of this state is dictated by energy conservation in this closed system, and the thermal distribution is robust against weak disturbances. We discuss how our findings open up new avenues to experimentally probe fundamental assumptions of statistical physics in solid-state systems.

AB - We discuss thermalization in a multimode quantum cavity under unitary evolution. According to general principles, an isolated system with quadratic couplings does not exhibit thermalization. However, we find that nonlinearities, here three-wave perturbation, typical for instance in superconducting Josephson systems, may lead to thermalization into a Bose-Einstein distribution of occupations of the modes. The temperature of this state is dictated by energy conservation in this closed system, and the thermal distribution is robust against weak disturbances. We discuss how our findings open up new avenues to experimentally probe fundamental assumptions of statistical physics in solid-state systems.

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Quantum thermalization via multiwave mixing

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THEPOW: Empowering quantum nanoelectronic devices using thermal energy

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Quantum thermalization via multiwave mixing

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THEPOW: Empowering quantum nanoelectronic devices using thermal energy

QTF 2 stage: Finnish Centre of Exellence in Quantum Technology

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