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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/2510.19317 |
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| _version_ | 1866911226507821056 |
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| author | Bhattacharjee, Suraka Mandal, Koushik Sinha, Supurna |
| author_facet | Bhattacharjee, Suraka Mandal, Koushik Sinha, Supurna |
| contents | We study the decoherence of an anisotropic anharmonic oscillator in a magnetic field, coupled to a bath of harmonic oscillators at high and low temperatures. We solve the anharmonic oscillator problem using perturbative techniques and derive the non-Markovian master equation in the weak coupling limit. The anharmonicity parameter α enhances decoherence due to the deconfining effect of anharmonicity. The oscillatory nature of the time evolution of heating function indicates information backflow. The von-Neumann entropy is also calculated for the system, which increases with α, consistent with the deconfining effect noted in the decoherence analysis. We have also proposed a cold ion experimental set up for testing our theoretical predictions. The study is of relevance to the domain of quantum technology where decoherence significantly affects the performance of a quantum computer. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_19317 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Decoherence of a dissipative Brownian charged magneto-anharmonic oscillator: an information theoretic approach Bhattacharjee, Suraka Mandal, Koushik Sinha, Supurna Quantum Physics Statistical Mechanics We study the decoherence of an anisotropic anharmonic oscillator in a magnetic field, coupled to a bath of harmonic oscillators at high and low temperatures. We solve the anharmonic oscillator problem using perturbative techniques and derive the non-Markovian master equation in the weak coupling limit. The anharmonicity parameter α enhances decoherence due to the deconfining effect of anharmonicity. The oscillatory nature of the time evolution of heating function indicates information backflow. The von-Neumann entropy is also calculated for the system, which increases with α, consistent with the deconfining effect noted in the decoherence analysis. We have also proposed a cold ion experimental set up for testing our theoretical predictions. The study is of relevance to the domain of quantum technology where decoherence significantly affects the performance of a quantum computer. |
| title | Decoherence of a dissipative Brownian charged magneto-anharmonic oscillator: an information theoretic approach |
| topic | Quantum Physics Statistical Mechanics |
| url | https://arxiv.org/abs/2510.19317 |