The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling

We study the energy-level crossing behavior in a two-dimensional quantum well with the Rashba and Dresselhaus spin-orbit couplings (SOCs). By mapping the SOC Hamiltonian onto an anisotropic Rabi model, we obtain the approximate ground state and its quantum Fisher information (QFI) via performing a u...

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Detalles Bibliográficos
Autores principales: Wang, Z. H., Zheng, Q., Wang, Xiaoguang, Li, Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4773991/
https://www.ncbi.nlm.nih.gov/pubmed/26931762
http://dx.doi.org/10.1038/srep22347
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author Wang, Z. H.
Zheng, Q.
Wang, Xiaoguang
Li, Yong
author_facet Wang, Z. H.
Zheng, Q.
Wang, Xiaoguang
Li, Yong
author_sort Wang, Z. H.
collection PubMed
description We study the energy-level crossing behavior in a two-dimensional quantum well with the Rashba and Dresselhaus spin-orbit couplings (SOCs). By mapping the SOC Hamiltonian onto an anisotropic Rabi model, we obtain the approximate ground state and its quantum Fisher information (QFI) via performing a unitary transformation. We find that the energy-level crossing can occur in the quantum well system within the available parameters rather than in cavity and circuit quantum eletrodynamics systems. Furthermore, the influence of two kinds of SOCs on the QFI is investigated and an intuitive explanation from the viewpoint of the stationary perturbation theory is given.
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spelling pubmed-47739912016-03-09 The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling Wang, Z. H. Zheng, Q. Wang, Xiaoguang Li, Yong Sci Rep Article We study the energy-level crossing behavior in a two-dimensional quantum well with the Rashba and Dresselhaus spin-orbit couplings (SOCs). By mapping the SOC Hamiltonian onto an anisotropic Rabi model, we obtain the approximate ground state and its quantum Fisher information (QFI) via performing a unitary transformation. We find that the energy-level crossing can occur in the quantum well system within the available parameters rather than in cavity and circuit quantum eletrodynamics systems. Furthermore, the influence of two kinds of SOCs on the QFI is investigated and an intuitive explanation from the viewpoint of the stationary perturbation theory is given. Nature Publishing Group 2016-03-02 /pmc/articles/PMC4773991/ /pubmed/26931762 http://dx.doi.org/10.1038/srep22347 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Wang, Z. H.
Zheng, Q.
Wang, Xiaoguang
Li, Yong
The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling
title The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling
title_full The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling
title_fullStr The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling
title_full_unstemmed The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling
title_short The energy-level crossing behavior and quantum Fisher information in a quantum well with spin-orbit coupling
title_sort energy-level crossing behavior and quantum fisher information in a quantum well with spin-orbit coupling
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4773991/
https://www.ncbi.nlm.nih.gov/pubmed/26931762
http://dx.doi.org/10.1038/srep22347
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