Evidence for quantum tunneling of phase-slip vortices in superfluid
- 13 July 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 69 (2) , 323-326
- https://doi.org/10.1103/physrevlett.69.323
Abstract
We have observed that at temperatures below 200 mK quantized vortices are created by a new process which is not described by the thermal activation theory of vortex nucleation. The critical flow velocity in a submicron orifice has been determined using two techniques. Down to about 200 mK the critical velocities rise linearly with falling temperature. Below this temperature the critical velocity stops rising and becomes almost temperature independent, indicating that a new process, possible quantum tunneling, dominates the phase-slip nucleation.This publication has 10 references indexed in Scilit:
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