Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model

A spin-boson-like model with two interacting qubits is analysed. The model turns out to be exactly solvable since it is characterized by the exchange symmetry between the two spins. The explicit expressions of eigenstates and eigenenergies make it possible to analytically unveil the occurrence of fi...

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Detalles Bibliográficos
Autores principales: Grimaudo, Roberto, Valenti, Davide, Sergi, Alessandro, Messina, Antonino
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9956034/
https://www.ncbi.nlm.nih.gov/pubmed/36832554
http://dx.doi.org/10.3390/e25020187
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author Grimaudo, Roberto
Valenti, Davide
Sergi, Alessandro
Messina, Antonino
author_facet Grimaudo, Roberto
Valenti, Davide
Sergi, Alessandro
Messina, Antonino
author_sort Grimaudo, Roberto
collection PubMed
description A spin-boson-like model with two interacting qubits is analysed. The model turns out to be exactly solvable since it is characterized by the exchange symmetry between the two spins. The explicit expressions of eigenstates and eigenenergies make it possible to analytically unveil the occurrence of first-order quantum phase transitions. The latter are physically relevant since they are characterized by abrupt changes in the two-spin subsystem concurrence, in the net spin magnetization and in the mean photon number.
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spelling pubmed-99560342023-02-25 Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model Grimaudo, Roberto Valenti, Davide Sergi, Alessandro Messina, Antonino Entropy (Basel) Article A spin-boson-like model with two interacting qubits is analysed. The model turns out to be exactly solvable since it is characterized by the exchange symmetry between the two spins. The explicit expressions of eigenstates and eigenenergies make it possible to analytically unveil the occurrence of first-order quantum phase transitions. The latter are physically relevant since they are characterized by abrupt changes in the two-spin subsystem concurrence, in the net spin magnetization and in the mean photon number. MDPI 2023-01-17 /pmc/articles/PMC9956034/ /pubmed/36832554 http://dx.doi.org/10.3390/e25020187 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Grimaudo, Roberto
Valenti, Davide
Sergi, Alessandro
Messina, Antonino
Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model
title Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model
title_full Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model
title_fullStr Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model
title_full_unstemmed Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model
title_short Superradiant Quantum Phase Transition for an Exactly Solvable Two-Qubit Spin-Boson Model
title_sort superradiant quantum phase transition for an exactly solvable two-qubit spin-boson model
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9956034/
https://www.ncbi.nlm.nih.gov/pubmed/36832554
http://dx.doi.org/10.3390/e25020187
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