Volume 237, 2022

Quantum entanglement control of electron–phonon systems by light irradiation

Abstract

We numerically study the dynamics of quantum entanglement between interacting electron–phonon and qubit–spin systems under photoirradiation, employing a model of multiple spins and boson modes. The interplay of the antiferromagnetic exchange and electron–phonon interactions provides us with a phase diagram, wherein each phase is characterized by the ground state property of the electron–phonon system. Light irradiation of the electron–phonon system facilitates the generation of quantum entanglement, according to the spin configuration and the phonon state in the ground state. Analyses using the quantum mutual information and the singular values of the reduced density matrix indicate that the quantum mechanical effect of the irradiated light appears in the state of the material.

Graphical abstract: Quantum entanglement control of electron–phonon systems by light irradiation

Associated articles

Article information

Article type
Paper
Submitted
11 jan 2022
Accepted
05 apr 2022
First published
05 apr 2022

Faraday Discuss., 2022,237, 108-124

Quantum entanglement control of electron–phonon systems by light irradiation

K. Ishida, H. Matsueda and A. Kamada, Faraday Discuss., 2022, 237, 108 DOI: 10.1039/D2FD00007E

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