Dynamics of decoherence in a noisy driven environment
Abstract We analyze the decoherence dynamics of a central spin coupled to a spin chain with a time-dependent noisy magnetic field, focusing on how noise influences the system’s decoherence. Our results show that decoherence due to the nonequilibrium critical dynamics of the environment is amplified...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-00815-8 |
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| author | R. Jafari A. Asadian M. Abdi Alireza Akbari |
| author_facet | R. Jafari A. Asadian M. Abdi Alireza Akbari |
| author_sort | R. Jafari |
| collection | DOAJ |
| description | Abstract We analyze the decoherence dynamics of a central spin coupled to a spin chain with a time-dependent noisy magnetic field, focusing on how noise influences the system’s decoherence. Our results show that decoherence due to the nonequilibrium critical dynamics of the environment is amplified in the presence of uncorrelated and correlated Gaussian noise. We demonstrate that decoherence factor consistently signals the critical points, and exhibits exponential scaling with the system size, the square of noise intensity, and the noise correlation time at the critical points. We find that strong coupling between the qubit and the environment leads to partial revivals of decoherence, which diminish with increasing noise intensity or decreasing noise correlation time. In contrast, weak coupling leads to monotonic enhanced decoherence. The numerical results illustrate that, the revivals decay and scale exponentially with noise intensity. Moreover, the revivals increase and indicate linear or power law scaling with noise correlation time depending on how the correlated noise is fast or slow. Additionally, we explore the non-Markovianity of the dynamics, finding that it decays in the presence of noise but increases as the noise correlation time grows. |
| format | Article |
| id | doaj-art-1a01a2da7e8546ffafb5f063d3125751 |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-1a01a2da7e8546ffafb5f063d31257512025-08-20T02:32:07ZengNature PortfolioScientific Reports2045-23222025-05-0115111210.1038/s41598-025-00815-8Dynamics of decoherence in a noisy driven environmentR. Jafari0A. Asadian1M. Abdi2Alireza Akbari3Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS)Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS)Wilczek Quantum Center, School of Physics and Astronomy, Shanghai Jiao Tong UniversityBeijing Institute of Mathematical Sciences and Applications (BIMSA)Abstract We analyze the decoherence dynamics of a central spin coupled to a spin chain with a time-dependent noisy magnetic field, focusing on how noise influences the system’s decoherence. Our results show that decoherence due to the nonequilibrium critical dynamics of the environment is amplified in the presence of uncorrelated and correlated Gaussian noise. We demonstrate that decoherence factor consistently signals the critical points, and exhibits exponential scaling with the system size, the square of noise intensity, and the noise correlation time at the critical points. We find that strong coupling between the qubit and the environment leads to partial revivals of decoherence, which diminish with increasing noise intensity or decreasing noise correlation time. In contrast, weak coupling leads to monotonic enhanced decoherence. The numerical results illustrate that, the revivals decay and scale exponentially with noise intensity. Moreover, the revivals increase and indicate linear or power law scaling with noise correlation time depending on how the correlated noise is fast or slow. Additionally, we explore the non-Markovianity of the dynamics, finding that it decays in the presence of noise but increases as the noise correlation time grows.https://doi.org/10.1038/s41598-025-00815-8 |
| spellingShingle | R. Jafari A. Asadian M. Abdi Alireza Akbari Dynamics of decoherence in a noisy driven environment Scientific Reports |
| title | Dynamics of decoherence in a noisy driven environment |
| title_full | Dynamics of decoherence in a noisy driven environment |
| title_fullStr | Dynamics of decoherence in a noisy driven environment |
| title_full_unstemmed | Dynamics of decoherence in a noisy driven environment |
| title_short | Dynamics of decoherence in a noisy driven environment |
| title_sort | dynamics of decoherence in a noisy driven environment |
| url | https://doi.org/10.1038/s41598-025-00815-8 |
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