Trapping $\tfrac{h}{2e}$ Flux in Metals
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arXiv
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866915731228065792 |
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| author | Komargodski, Zohar Popov, Fedor K. |
| author_facet | Komargodski, Zohar Popov, Fedor K. |
| contents | We report on a new flux quantization phenomenon in metals. We study the response of normal metals to the presence of localized magnetic flux. We find that, due to backreaction effects, the metal traps 0 flux or $\tfrac{h}{2e}$ flux (half flux). We exhibit this effect both for metals pierced by magnetic solenoids and metals wrapping a magnetic solenoid. In the latter case we demonstrate the trapping of magnetic flux analytically. Furthermore, we find that as the solenoid is adiabatically turned off, a logarithmically enhanced localized equilibrium current persists, reflecting perfect defect-diamagnetism of the Fermi gas. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_09847 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Trapping $\tfrac{h}{2e}$ Flux in Metals Komargodski, Zohar Popov, Fedor K. Strongly Correlated Electrons High Energy Physics - Theory We report on a new flux quantization phenomenon in metals. We study the response of normal metals to the presence of localized magnetic flux. We find that, due to backreaction effects, the metal traps 0 flux or $\tfrac{h}{2e}$ flux (half flux). We exhibit this effect both for metals pierced by magnetic solenoids and metals wrapping a magnetic solenoid. In the latter case we demonstrate the trapping of magnetic flux analytically. Furthermore, we find that as the solenoid is adiabatically turned off, a logarithmically enhanced localized equilibrium current persists, reflecting perfect defect-diamagnetism of the Fermi gas. |
| title | Trapping $\tfrac{h}{2e}$ Flux in Metals |
| topic | Strongly Correlated Electrons High Energy Physics - Theory |
| url | https://arxiv.org/abs/2601.09847 |