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Open Quantum Systems Decoherence

Momentum Diffusion, Decoherence and Drag Force on a Magnetic Nanoparticle

arXiv
Authors: Agya Sewara Alam, Anupam Mazumdar

Year

2026

Paper ID

15675

Status

Preprint

Abstract Read

~2 min

Abstract Words

105

Citations

N/A

Abstract

In this paper, we will provide a complete derivation of the decoherence rate for a magnetic nanoparticle in quantum superposition in the presence of the fluctuating electromagnetic field in a thermal background by using the fluctuation-dissipation theorem in the long-wavelength limit. The long-wavelength limit assumes that the superposition size is much smaller than the wavelength of the electromagentic filed fluctuations. We will extend this computation to two diamagnetic nanoparticles kept in quantum superposition adjacent to each other. We will also show how the drag force on a single nanoparticle arises from external electromagnetic-field fluctuations, and compare our results with those for the nanoparticle's dielectric properties.

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  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
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  • In this paper, we will provide a complete derivation of the decoherence rate for a magnetic nanoparticle in quantum superposition in the presence of the fluctuating...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2602.21518 [2] arXiv https://arxiv.org/abs/2602.21518 [3] Publisher https://arxiv.org/abs/2602.21518

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