Decoherence of a dissipative Brownian charged magneto-anharmonic oscillator: an information theoretic approach

• URL: http://arxiv.org/abs/2510.19317v1
• Date: Wed, 22 Oct 2025 07:27:40 GMT
• Title: Decoherence of a dissipative Brownian charged magneto-anharmonic oscillator: an information theoretic approach
• Authors: Suraka Bhattacharjee, Koushik Mandal, Supurna Sinha,
• Abstract summary: 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.<n>The anharmonicity parameter alpha enhances decoherence due to the deconfining effect of anharmonicity.<n>The study is of relevance to the domain of quantum technology where decoherence significantly affects the performance of a quantum computer.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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 {\alpha} 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 {\alpha}, 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.

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