Magnetic field fluctuations induced decoherence of a diamagnetic nanosphere
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909798987988992 |
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| author | Zhang, Ruiyun Schut, Martine Mazumdar, Anupam |
| author_facet | Zhang, Ruiyun Schut, Martine Mazumdar, Anupam |
| contents | This paper provides a simple derivation of the decoherence rate for a diamagnetic nanoparticle in the presence of fluctuations of the magnetic field in a thermal environment. 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 endeavours 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 a dielectric material interacting with the electric field component of the background field; however, it is often relatively suppressed due to the material properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_07632 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic field fluctuations induced decoherence of a diamagnetic nanosphere Zhang, Ruiyun Schut, Martine Mazumdar, Anupam Quantum Physics This paper provides a simple derivation of the decoherence rate for a diamagnetic nanoparticle in the presence of fluctuations of the magnetic field in a thermal environment. 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 endeavours 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 a dielectric material interacting with the electric field component of the background field; however, it is often relatively suppressed due to the material properties. |
| title | Magnetic field fluctuations induced decoherence of a diamagnetic nanosphere |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2501.07632 |