Two-dimensional tunneling in a SQUID

Details Two-dimensional tunneling in a SQUID Two-dimensional tunneling in a SQUID

2010-04-07

arxiv.org/abs/1004.0987v1

Physics

Condensed Matter

Superconductivity

9 pages, 8 figures

Scientific paper

Traditionally quantum tunneling in a static SQUID is studied on the basis of a classical trajectory in imaginary time under a two-dimensional potential barrier. The trajectory connects a potential well and an outer region crossing their borders in perpendicular directions. In contrast to that main-path mechanism, a wide set of trajectories with components tangent to the border of the well can constitute an alternative mechanism of multi-path tunneling. The phenomenon is essentially non-one-dimensional. Continuously distributed paths under the barrier result in enhancement of tunneling probability. A type of tunneling mechanism (main-path or multi-path) depends on character of a state in the potential well prior to tunneling.

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