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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2512.18481 |
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| _version_ | 1866912780020350976 |
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| author | Avalos, C. F. P. Prataviera, G. A. de Oliveira, M. C. |
| author_facet | Avalos, C. F. P. Prataviera, G. A. de Oliveira, M. C. |
| contents | We investigate the dynamics of two trapped ions interacting with a common thermal reservoir, focusing on how cross-correlated dissipation influences heating, steady-state behavior, and parameter sensitivity. Starting from a microscopic system--reservoir model, we derive the corresponding Heisenberg--Langevin equations and show that reservoir-induced correlations generate collective decay channels and, when the cross-damping rate matches the local damping, a decoherence-free normal mode that preserves memory of the initial excitations. Using the Fisher information associated with motional population measurements, we identify the parameter regimes in which cross-damping enhances the estimability of both system and reservoir properties. For nonclassical initial states, we also show that reservoir-mediated correlations can generate or maintain entanglement, with the strongest effects occurring near the decoherence-free condition. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_18481 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Collective Dissipation and Parameter Sensitivity in Trapped Ions Coupled to a Common Thermal Reservoir Avalos, C. F. P. Prataviera, G. A. de Oliveira, M. C. Quantum Physics We investigate the dynamics of two trapped ions interacting with a common thermal reservoir, focusing on how cross-correlated dissipation influences heating, steady-state behavior, and parameter sensitivity. Starting from a microscopic system--reservoir model, we derive the corresponding Heisenberg--Langevin equations and show that reservoir-induced correlations generate collective decay channels and, when the cross-damping rate matches the local damping, a decoherence-free normal mode that preserves memory of the initial excitations. Using the Fisher information associated with motional population measurements, we identify the parameter regimes in which cross-damping enhances the estimability of both system and reservoir properties. For nonclassical initial states, we also show that reservoir-mediated correlations can generate or maintain entanglement, with the strongest effects occurring near the decoherence-free condition. |
| title | Collective Dissipation and Parameter Sensitivity in Trapped Ions Coupled to a Common Thermal Reservoir |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2512.18481 |