The quantum Zeno and anti-Zeno effects with strong system-environment coupling
To date, studies of the quantum Zeno and anti-Zeno effects focus on quantum systems that are weakly interacting with their environment. In this paper, we investigate what happens to a quantum system under the action of repeated measurements if the quantum system is strongly interacting with its envi...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2017-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-01844-8 |
| _version_ | 1818752467658080256 |
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| author | Adam Zaman Chaudhry |
| author_facet | Adam Zaman Chaudhry |
| author_sort | Adam Zaman Chaudhry |
| collection | DOAJ |
| description | To date, studies of the quantum Zeno and anti-Zeno effects focus on quantum systems that are weakly interacting with their environment. In this paper, we investigate what happens to a quantum system under the action of repeated measurements if the quantum system is strongly interacting with its environment. We consider as the quantum system a single two-level system coupled strongly to a collection of harmonic oscillators. A so-called polaron transformation is then used to make the problem in the strong system-environment coupling regime tractable. We find that the strong coupling case exhibits quantitative and qualitative differences as compared with the weak coupling case. In particular, the effective decay rate does not depend linearly on the spectral density of the environment. This then means that, in the strong coupling regime that we investigate, increasing the system-environment coupling strength can actually decrease the effective decay rate. We also consider a collection of two-level atoms coupled strongly with a common environment. In this case, we find that there are further differences between the weak and strong coupling cases since the two-level atoms can now indirectly interact with one another due to the common environment. |
| first_indexed | 2024-12-18T04:51:56Z |
| format | Article |
| id | doaj.art-34a2fb89a326499994e3ba18bd39fa57 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-18T04:51:56Z |
| publishDate | 2017-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-34a2fb89a326499994e3ba18bd39fa572022-12-21T21:20:23ZengNature PortfolioScientific Reports2045-23222017-05-017111110.1038/s41598-017-01844-8The quantum Zeno and anti-Zeno effects with strong system-environment couplingAdam Zaman Chaudhry0School of Science & Engineering, Lahore University of Management Sciences (LUMS), Opposite Sector U, D.H.ATo date, studies of the quantum Zeno and anti-Zeno effects focus on quantum systems that are weakly interacting with their environment. In this paper, we investigate what happens to a quantum system under the action of repeated measurements if the quantum system is strongly interacting with its environment. We consider as the quantum system a single two-level system coupled strongly to a collection of harmonic oscillators. A so-called polaron transformation is then used to make the problem in the strong system-environment coupling regime tractable. We find that the strong coupling case exhibits quantitative and qualitative differences as compared with the weak coupling case. In particular, the effective decay rate does not depend linearly on the spectral density of the environment. This then means that, in the strong coupling regime that we investigate, increasing the system-environment coupling strength can actually decrease the effective decay rate. We also consider a collection of two-level atoms coupled strongly with a common environment. In this case, we find that there are further differences between the weak and strong coupling cases since the two-level atoms can now indirectly interact with one another due to the common environment.https://doi.org/10.1038/s41598-017-01844-8 |
| spellingShingle | Adam Zaman Chaudhry The quantum Zeno and anti-Zeno effects with strong system-environment coupling Scientific Reports |
| title | The quantum Zeno and anti-Zeno effects with strong system-environment coupling |
| title_full | The quantum Zeno and anti-Zeno effects with strong system-environment coupling |
| title_fullStr | The quantum Zeno and anti-Zeno effects with strong system-environment coupling |
| title_full_unstemmed | The quantum Zeno and anti-Zeno effects with strong system-environment coupling |
| title_short | The quantum Zeno and anti-Zeno effects with strong system-environment coupling |
| title_sort | quantum zeno and anti zeno effects with strong system environment coupling |
| url | https://doi.org/10.1038/s41598-017-01844-8 |
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