Inductive van der Waals Force between Two Quantum Loops
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arXiv
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866914201442713600 |
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| author | Kang, Kicheon |
| author_facet | Kang, Kicheon |
| contents | We study the van der Waals-London force, which is typically associated with fluctuating dipoles in atoms, in a mesoscopic circuit consisting of two inductively coupled superconducting loops. We investigate the ``inductive" van der Waals-London interaction using both semiclassical and quantum electrodynamic (QED) approaches. The semiclassical model predicts a repulsive interaction due to anticorrelated current fluctuations. In contrast, the QED framework, which incorporates virtual photon exchange, reveals a predominantly attractive force. A key contribution comes from a state-independent two-photon exchange, which is absent in the semiclassical description and undetectable by spectroscopy. Our study introduces a new experimental platform for measuring the van der Waals force between individual artificial atoms via controlled mesoscopic circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_01263 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Inductive van der Waals Force between Two Quantum Loops Kang, Kicheon Mesoscale and Nanoscale Physics Atomic Physics Quantum Physics We study the van der Waals-London force, which is typically associated with fluctuating dipoles in atoms, in a mesoscopic circuit consisting of two inductively coupled superconducting loops. We investigate the ``inductive" van der Waals-London interaction using both semiclassical and quantum electrodynamic (QED) approaches. The semiclassical model predicts a repulsive interaction due to anticorrelated current fluctuations. In contrast, the QED framework, which incorporates virtual photon exchange, reveals a predominantly attractive force. A key contribution comes from a state-independent two-photon exchange, which is absent in the semiclassical description and undetectable by spectroscopy. Our study introduces a new experimental platform for measuring the van der Waals force between individual artificial atoms via controlled mesoscopic circuits. |
| title | Inductive van der Waals Force between Two Quantum Loops |
| topic | Mesoscale and Nanoscale Physics Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2512.01263 |