Cargando…
Exploiting Non-Markovianity for Quantum Control
Quantum technology, exploiting entanglement and the wave nature of matter, relies on the ability to accurately control quantum systems. Quantum control is often compromised by the interaction of the system with its environment since this causes loss of amplitude and phase. However, when the dynamics...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4510487/ https://www.ncbi.nlm.nih.gov/pubmed/26199059 http://dx.doi.org/10.1038/srep12430 |
_version_ | 1782382176307773440 |
---|---|
author | Reich, Daniel M. Katz, Nadav Koch, Christiane P. |
author_facet | Reich, Daniel M. Katz, Nadav Koch, Christiane P. |
author_sort | Reich, Daniel M. |
collection | PubMed |
description | Quantum technology, exploiting entanglement and the wave nature of matter, relies on the ability to accurately control quantum systems. Quantum control is often compromised by the interaction of the system with its environment since this causes loss of amplitude and phase. However, when the dynamics of the open quantum system is non-Markovian, amplitude and phase flow not only from the system into the environment but also back. Interaction with the environment is then not necessarily detrimental. We show that the back-flow of amplitude and phase can be exploited to carry out quantum control tasks that could not be realized if the system was isolated. The control is facilitated by a few strongly coupled, sufficiently isolated environmental modes. Our paradigmatic example considers a weakly anharmonic ladder with resonant amplitude control only, restricting realizable operations to SO(N). The coupling to the environment, when harnessed with optimization techniques, allows for full SU(N) controllability. |
format | Online Article Text |
id | pubmed-4510487 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-45104872015-07-28 Exploiting Non-Markovianity for Quantum Control Reich, Daniel M. Katz, Nadav Koch, Christiane P. Sci Rep Article Quantum technology, exploiting entanglement and the wave nature of matter, relies on the ability to accurately control quantum systems. Quantum control is often compromised by the interaction of the system with its environment since this causes loss of amplitude and phase. However, when the dynamics of the open quantum system is non-Markovian, amplitude and phase flow not only from the system into the environment but also back. Interaction with the environment is then not necessarily detrimental. We show that the back-flow of amplitude and phase can be exploited to carry out quantum control tasks that could not be realized if the system was isolated. The control is facilitated by a few strongly coupled, sufficiently isolated environmental modes. Our paradigmatic example considers a weakly anharmonic ladder with resonant amplitude control only, restricting realizable operations to SO(N). The coupling to the environment, when harnessed with optimization techniques, allows for full SU(N) controllability. Nature Publishing Group 2015-07-22 /pmc/articles/PMC4510487/ /pubmed/26199059 http://dx.doi.org/10.1038/srep12430 Text en Copyright © 2015, 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 Reich, Daniel M. Katz, Nadav Koch, Christiane P. Exploiting Non-Markovianity for Quantum Control |
title | Exploiting Non-Markovianity for Quantum Control |
title_full | Exploiting Non-Markovianity for Quantum Control |
title_fullStr | Exploiting Non-Markovianity for Quantum Control |
title_full_unstemmed | Exploiting Non-Markovianity for Quantum Control |
title_short | Exploiting Non-Markovianity for Quantum Control |
title_sort | exploiting non-markovianity for quantum control |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4510487/ https://www.ncbi.nlm.nih.gov/pubmed/26199059 http://dx.doi.org/10.1038/srep12430 |
work_keys_str_mv | AT reichdanielm exploitingnonmarkovianityforquantumcontrol AT katznadav exploitingnonmarkovianityforquantumcontrol AT kochchristianep exploitingnonmarkovianityforquantumcontrol |