Quantum Nucleation of Phase Slips in a 1d Model of a Superfluid

Preprint

10 April 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9704094

Abstract

We use a 1d model of a superfluid based on the Gross-Pitaevskii Lagrangian to illustrate a general numerical method designed to find quantum tunneling rates in extended bosonic systems. Specifically, we study flow past an obstacle and directly solve the imaginary time dynamics to find the ``bounce'' solution connected with the decay of the metastable laminar state via phase slip nucleation. The action for the tunneling confuguration goes to zero at the threshold (in superfluid velocity) for classical production of these slips. Applications to other processes are briefly discussed.

Keywords

APPLICATIONS TO OTHER PROCESSES
QUANTUM NUCLEATION
NUMERICAL METHOD
PHASE SLIP
SUPERFLUID
METASTABLE
TUNNELING
1D MODEL
MODEL

All Related Versions

Version 1, 1997-04-10, ArXiv
Published version: Physical Review Letters, 79 (25), 5054.

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