dorsal/arxiv
View SchemaMagnetic relaxation of superconducting quantum dot: two-dimensional false vacuum decay
| Authors | D. R. Gulevich, F. V. Kusmartsev |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0609082 |
| URL | https://arxiv.org/abs/quant-ph/0609082 |
| Journal | Int. J. Mod. Phys. B 23, 4422 (2009) |
Abstract
Quantum tunneling of vortices has been found to be an important novel phenomena for description of low temperature creep in high temperature superconductors (HTSCs). We speculate that quantum tunneling may be also exhibited in mesoscopic superconductors due to vortices trapped by the Bean-Livingston barrier. The London approximation and method of images is used to estimate the shape of the potential well in superconducting HTSC quantum dot. To calculate the escape rate we use the instanton technique. We model the vortex by a quantum particle tunneling from a two-dimensional ground state under magnetic field applied in the transverse direction. The resulting decay rates obtained by the instanton approach and conventional WKB are compared revealing complete coincidence with each other.
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"abstract": "Quantum tunneling of vortices has been found to be an important novel\nphenomena for description of low temperature creep in high temperature\nsuperconductors (HTSCs). We speculate that quantum tunneling may be also\nexhibited in mesoscopic superconductors due to vortices trapped by the\nBean-Livingston barrier. The London approximation and method of images is used\nto estimate the shape of the potential well in superconducting HTSC quantum\ndot. To calculate the escape rate we use the instanton technique. We model the\nvortex by a quantum particle tunneling from a two-dimensional ground state\nunder magnetic field applied in the transverse direction. The resulting decay\nrates obtained by the instanton approach and conventional WKB are compared\nrevealing complete coincidence with each other.",
"arxiv_id": "quant-ph/0609082",
"authors": [
"D. R. Gulevich",
"F. V. Kusmartsev"
],
"categories": [
"quant-ph"
],
"journal_ref": "Int. J. Mod. Phys. B 23, 4422 (2009)",
"title": "Magnetic relaxation of superconducting quantum dot: two-dimensional false vacuum decay",
"url": "https://arxiv.org/abs/quant-ph/0609082"
},
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