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Relationship between quantum speed limit time and memory time in a photonic-band-gap environment
Non-Markovian effect is found to be able to decrease the quantum speed limit (QSL) time, and hence to enhance the intrinsic speed of quantum evolution. Although a reservoir with larger degree of non-Markovianity may seem like it should cause smaller QSL times, this seemingly intuitive thinking may n...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5180220/ https://www.ncbi.nlm.nih.gov/pubmed/28008937 http://dx.doi.org/10.1038/srep39110 |
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author | Wang, J. Wu, Y. N. Mo, M. L. Zhang, H. Z. |
author_facet | Wang, J. Wu, Y. N. Mo, M. L. Zhang, H. Z. |
author_sort | Wang, J. |
collection | PubMed |
description | Non-Markovian effect is found to be able to decrease the quantum speed limit (QSL) time, and hence to enhance the intrinsic speed of quantum evolution. Although a reservoir with larger degree of non-Markovianity may seem like it should cause smaller QSL times, this seemingly intuitive thinking may not always be true. We illustrate this by investigating the QSL time of a qubit that is coupled to a two-band photonic-band-gap (PBG) environment. We show how the QSL time is influenced by the coherent property of the reservoir and the band-gap width. In particular, we find that the decrease of the QSL time is not attributed to the increasing non-Markovianity, while the memory time of the environment can be seen as an essential reflection to the QSL time. So, the QSL time provides a further insight and sharper identification of memory time in a PBG environment. We also discuss a feasible experimental realization of our prediction. |
format | Online Article Text |
id | pubmed-5180220 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-51802202016-12-29 Relationship between quantum speed limit time and memory time in a photonic-band-gap environment Wang, J. Wu, Y. N. Mo, M. L. Zhang, H. Z. Sci Rep Article Non-Markovian effect is found to be able to decrease the quantum speed limit (QSL) time, and hence to enhance the intrinsic speed of quantum evolution. Although a reservoir with larger degree of non-Markovianity may seem like it should cause smaller QSL times, this seemingly intuitive thinking may not always be true. We illustrate this by investigating the QSL time of a qubit that is coupled to a two-band photonic-band-gap (PBG) environment. We show how the QSL time is influenced by the coherent property of the reservoir and the band-gap width. In particular, we find that the decrease of the QSL time is not attributed to the increasing non-Markovianity, while the memory time of the environment can be seen as an essential reflection to the QSL time. So, the QSL time provides a further insight and sharper identification of memory time in a PBG environment. We also discuss a feasible experimental realization of our prediction. Nature Publishing Group 2016-12-23 /pmc/articles/PMC5180220/ /pubmed/28008937 http://dx.doi.org/10.1038/srep39110 Text en Copyright © 2016, The Author(s) 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, J. Wu, Y. N. Mo, M. L. Zhang, H. Z. Relationship between quantum speed limit time and memory time in a photonic-band-gap environment |
title | Relationship between quantum speed limit time and memory time in a photonic-band-gap environment |
title_full | Relationship between quantum speed limit time and memory time in a photonic-band-gap environment |
title_fullStr | Relationship between quantum speed limit time and memory time in a photonic-band-gap environment |
title_full_unstemmed | Relationship between quantum speed limit time and memory time in a photonic-band-gap environment |
title_short | Relationship between quantum speed limit time and memory time in a photonic-band-gap environment |
title_sort | relationship between quantum speed limit time and memory time in a photonic-band-gap environment |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5180220/ https://www.ncbi.nlm.nih.gov/pubmed/28008937 http://dx.doi.org/10.1038/srep39110 |
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