Decoherence in a superconducting ring
| dc.creator | Khlebnikov, S. | |
| dc.date | 2000-10-19 | |
| dc.date | 2000-12-28 | |
| dc.date.accessioned | 2026-07-07T06:01:01Z | |
| dc.date.available | 2026-07-07T06:01:01Z | |
| dc.description | A superconducting ring has different sectors of states corresponding to different values of the trapped magnetic flux; this multitude of states can be used for quantum information storage. If a current supporting a nonzero flux is set up in the ring, fluctuations of electromagnetic field will be able to ``detect'' that current and thus cause a loss of quantum coherence. We estimate the decoherence exponent for a ring of a round type-II wire and find that it contains a macroscopic suppression factor $(δ/ R_{1})^{2}$, where $R_{1}$ is the radius of the wire, and $δ$ is the London penetration depth. We present some encouraging numerical estimates based on this result. | |
| dc.description | 13 pages, revtex, 1 figure; corrected calculation for low frequencies | |
| dc.identifier | https://arxiv.org/abs/quant-ph/0010072 | |
| dc.identifier | http://arxiv.org/abs/quant-ph/0010072 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/89138 | |
| dc.subject | Quantum Physics | |
| dc.subject | Superconductivity | |
| dc.title | Decoherence in a superconducting ring | |
| dc.type | text |