| Issue |
EPL
Volume 126, Number 1, April 2019
|
|
|---|---|---|
| Article Number | 10004 | |
| Number of page(s) | 5 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/126/10004 | |
| Published online | 20 May 2019 | |
Superconducting fluctuation current in a space with the Kerr metric
1 Department of Physics, Ritsumeikan University-BKC - Kusatsu, 525-8577, Japan
2 Department of Physics, Osaka City University - 3–3–138 Sugimoto, Sumiyoshi-ku, Osaka City, Osaka, 558-8585, Japan
Received: 26 January 2019
Accepted: 9 April 2019
We study a fluctuation current through a superconducting ring placed in a space with the Kerr metric. This attempt aims at exploring a conceptual problem; namely, we are concerned with the question about the condensed state in an extreme space-time. The superconducting ring is supposed to be placed in the space surrounding the Kerr black hole (KBH) such that the rotating axis of the KBH penetrates the center of the ring. The formulation is based on the Landau-Ginzburg free-energy functional of linear form. The resultant fluctuation current shows several peculiar features that reflect characteristic aspects of the KBH; that is, the effect of the Kerr metric gives rise to the shift of superconducting transition temperature as well as the scale change of absolute temperature.
PACS: 04.90.+e – Other topics in general relativity and gravitation (restricted to new topics in section 04) / 74.20.De – Phenomenological theories (two-fluid, Ginzburg-Landau, etc.) / 74.40.-n – Fluctuation phenomena
© EPLA, 2019
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