Quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system

We study the effect of quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled harmonic-oscillator system. Here, the quantum entanglement is caused by the counterrotating interaction terms and hence it is maintained by the virtual excitations. We obtain the analytical expr...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhou, Jian-Yong, Zhou, Yue-Hui, Yin, Xian-Li, Huang, Jin-Feng, Liao, Jie-Qiao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7387496/
https://www.ncbi.nlm.nih.gov/pubmed/32724074
http://dx.doi.org/10.1038/s41598-020-68309-3
_version_ 1783564132984815616
author Zhou, Jian-Yong
Zhou, Yue-Hui
Yin, Xian-Li
Huang, Jin-Feng
Liao, Jie-Qiao
author_facet Zhou, Jian-Yong
Zhou, Yue-Hui
Yin, Xian-Li
Huang, Jin-Feng
Liao, Jie-Qiao
author_sort Zhou, Jian-Yong
collection PubMed
description We study the effect of quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled harmonic-oscillator system. Here, the quantum entanglement is caused by the counterrotating interaction terms and hence it is maintained by the virtual excitations. We obtain the analytical expression for the ground state of the system and analyze the relationship between the average excitation numbers and the ground-state entanglement. We also study the entanglement dynamics between the two oscillators in both the closed- and open-system cases. In the latter case, the quantum master equation is microscopically derived in the normal-mode representation of the coupled-oscillator system. This work will open a route to the study of quantum information processing and quantum physics based on virtual excitations.
format Online
Article
Text
id pubmed-7387496
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-73874962020-07-29 Quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system Zhou, Jian-Yong Zhou, Yue-Hui Yin, Xian-Li Huang, Jin-Feng Liao, Jie-Qiao Sci Rep Article We study the effect of quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled harmonic-oscillator system. Here, the quantum entanglement is caused by the counterrotating interaction terms and hence it is maintained by the virtual excitations. We obtain the analytical expression for the ground state of the system and analyze the relationship between the average excitation numbers and the ground-state entanglement. We also study the entanglement dynamics between the two oscillators in both the closed- and open-system cases. In the latter case, the quantum master equation is microscopically derived in the normal-mode representation of the coupled-oscillator system. This work will open a route to the study of quantum information processing and quantum physics based on virtual excitations. Nature Publishing Group UK 2020-07-28 /pmc/articles/PMC7387496/ /pubmed/32724074 http://dx.doi.org/10.1038/s41598-020-68309-3 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Zhou, Jian-Yong
Zhou, Yue-Hui
Yin, Xian-Li
Huang, Jin-Feng
Liao, Jie-Qiao
Quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system
title Quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system
title_full Quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system
title_fullStr Quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system
title_full_unstemmed Quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system
title_short Quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system
title_sort quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7387496/
https://www.ncbi.nlm.nih.gov/pubmed/32724074
http://dx.doi.org/10.1038/s41598-020-68309-3
work_keys_str_mv AT zhoujianyong quantumentanglementmaintainedbyvirtualexcitationsinanultrastronglycoupledoscillatorsystem
AT zhouyuehui quantumentanglementmaintainedbyvirtualexcitationsinanultrastronglycoupledoscillatorsystem
AT yinxianli quantumentanglementmaintainedbyvirtualexcitationsinanultrastronglycoupledoscillatorsystem
AT huangjinfeng quantumentanglementmaintainedbyvirtualexcitationsinanultrastronglycoupledoscillatorsystem
AT liaojieqiao quantumentanglementmaintainedbyvirtualexcitationsinanultrastronglycoupledoscillatorsystem

Ejemplares similares