Vacuum fluctuations induced decoherence of a diamagnetic nanosphere

• URL: http://arxiv.org/abs/2501.07632v1
• Date: Mon, 13 Jan 2025 19:00:02 GMT
• Title: Vacuum fluctuations induced decoherence of a diamagnetic nanosphere
• Authors: Ruiyun Zhang, Martine Schut, Anupam Mazumdar,
• Abstract summary: This paper provides a simple derivation of the decoherence rate for a diamagnetic nanoparticles in the presence of vacuum fluctuations of the magnetic field. We show that our resulting decoherence rate expression is analogous to that of dielectric material in the presence of vacuum fluctuations due to the electric background field component.
• Score: 0.7373617024876725
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• Abstract: This paper provides a simple derivation of the decoherence rate for a diamagnetic nanoparticle in the presence of vacuum fluctuations of the magnetic field. Diamagnetic levitation is one of the key techniques for trapping, cooling, and creating a macroscopic quantum spatial superposition in many experiments. It is widely applied in many theoretical and experimental endeavors to test fundamental physics in matter-wave interferometers. To estimate the decoherence rate originating from magnetic-field fluctuations, we use the fluctuation-dissipation theorem. We show that our resulting decoherence rate expression is analogous to that of dielectric material in the presence of vacuum fluctuations due to the electric background field component; however, it is often relatively suppressed due to the material properties.

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