Title:	Decoherence of a dissipative Brownian charged magneto-anharmonic oscillator: an information theoretic approach
Authors:	Bhattacharjee, Suraka Mandal, Koushik Sinha, Supurna
Issue Date:	22-Dec-2025
Publisher:	Journal of Physics A: Mathematical and Theoretical
Citation:	Journal of Physics A: Mathematical and Theoretical, 2025, Vol. 58 (50), AR No. 505301
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 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.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/8654
ISSN:	1751-8121
Alternative Location:	https://arxiv.org/abs/2510.19317v1 http://doi.org/10.1088/1751-8121/ae2bd1
Copyright:	2025 IOP Publishing Ltd.
Appears in Collections:	Research Papers (TP)

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