Published in:
Physical Review Letters 93,9 (2004) 090403;
Link to original published article:
http://dx.doi.org/10.1103/PhysRevLett.93.090403
Abstract
Quantum phase slips (QPS) in narrow superfluid channels generate momentum by unwinding the supercurrent. In a uniform Bose gas, this momentum needs to be absorbed by quasiparticles (phonons). We show that this requirement results in an additional exponential suppression of the QPS rate (compared to the rate of QPS induced by a sharply localized perturbation). In BCS-paired fluids, momentum can be transferred to fermionic quasiparticles, and we find an interesting interplay between quasiparticle scattering on QPS and on disorder.
Keywords
superconducting wires;; fluctuations;; system;; decay
Date of this Version
January 2004
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