Quantum tunneling of semifluxons
| dc.creator | Goldobin, E. | |
| dc.creator | Vogel, K. | |
| dc.creator | Crasser, O. | |
| dc.creator | Walser, R. | |
| dc.creator | Schleich, W. P. | |
| dc.creator | Koelle, D. | |
| dc.creator | Kleiner, R. | |
| dc.date | 2005-04-20 | |
| dc.date.accessioned | 2026-07-07T03:04:49Z | |
| dc.date.available | 2026-07-07T03:04:49Z | |
| dc.description | We consider a system of two semifluxons of opposite polarity in a 0-pi-0 long Josephson junction, which classically can be in one of two degenerate states: up-down or down-up. When the distance $a$ between the 0-pi boundaries (semifluxon's centers) is a bit larger than the crossover distance $a_c$, the system can switch from one state to the other due to thermal fluctuations or quantum tunneling. We map this problem to the dynamics of a single particle in a double well potential and estimate parameters for which quantum effects emerge. We also determine the classical-to-quantum crossover temperature as well as the tunneling rate (energy level splitting) between the states up-down and down-up. | |
| dc.description | submitted to PRB, comments/questions are welcome | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0504507 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0504507 | |
| dc.identifier | Phys. Rev. B. 72, 054527 (2005) | |
| dc.identifier | doi:10.1103/PhysRevB.72.054527 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/26232 | |
| dc.subject | Superconductivity | |
| dc.title | Quantum tunneling of semifluxons | |
| dc.type | text |