Separation of relaxation timescales via strong system-bath coupling: Dissipative three-level system as a case study
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915685210259456 |
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| author | Min, Brett Gerry, Matthew Segal, Dvira |
| author_facet | Min, Brett Gerry, Matthew Segal, Dvira |
| contents | We analytically demonstrate that strong system-bath coupling separates the relaxation dynamics of a dissipative quantum system into two distinct regimes: a short-time dynamics that, as expected, accelerates with increasing coupling to the environment, and a slow dynamics that, counterintuitively, becomes increasingly prolonged at sufficiently strong coupling. Using the reaction-coordinate polaron-transform mapping, we uncover the general mechanism behind this effect and derive accurate expressions for both relaxation timescales. Numerical simulations confirm our analytical predictions. From a practical perspective, our results suggest that strong coupling to a dissipative bath can autonomously generate and sustain long-lived quantum coherences, offering a promising strategy for bath-engineered quantum state preparation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_11712 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Separation of relaxation timescales via strong system-bath coupling: Dissipative three-level system as a case study Min, Brett Gerry, Matthew Segal, Dvira Quantum Physics Other Condensed Matter We analytically demonstrate that strong system-bath coupling separates the relaxation dynamics of a dissipative quantum system into two distinct regimes: a short-time dynamics that, as expected, accelerates with increasing coupling to the environment, and a slow dynamics that, counterintuitively, becomes increasingly prolonged at sufficiently strong coupling. Using the reaction-coordinate polaron-transform mapping, we uncover the general mechanism behind this effect and derive accurate expressions for both relaxation timescales. Numerical simulations confirm our analytical predictions. From a practical perspective, our results suggest that strong coupling to a dissipative bath can autonomously generate and sustain long-lived quantum coherences, offering a promising strategy for bath-engineered quantum state preparation. |
| title | Separation of relaxation timescales via strong system-bath coupling: Dissipative three-level system as a case study |
| topic | Quantum Physics Other Condensed Matter |
| url | https://arxiv.org/abs/2507.11712 |