Abstract
We examine the problem of quantum vortex tunneling in the Gross-Pitaevskii model. The effect of gapless phonons is to produce a super-Ohmic quantum dissipation that renormalizes the effective tunneling parameters but does not destroy quantum coherence. The renormalization of the instanton frequency is computed within a specific model tunneling potential.
- Received 2 July 2008
DOI:https://doi.org/10.1103/PhysRevB.78.094508
©2008 American Physical Society