Bosonic heat bath associated with a moving soliton in a fermionic system
School of Mathematical and Physical Sciences,
The University of Sussex, Brighton BN1 9QH, Sussex, UK
2 Ruhr Universität Bochum, Fakultat für Physik und Astronomie, D-44780 Bochum, Germany
Accepted: 12 January 1996
When a soliton (such as a kink or vortex) in a condensed fermionic system moves, it produces particle-hole pairs. These approximately behave as a bosonic field, equivalent to a bath of harmonic oscillators and an effective bosonization of the fermion degrees of freedom very naturally arises. This work considers the theory of a moving soliton and an expression is given for the quantity, known as the spectral function, that characterises the effective bosons in the system. For a specific system possessing a soliton, the spectral function is evaluated.
PACS: 05.40.+j – Fluctuation phenomena, random processes, and Brownian motion / 74.60.Ge – Flux pinning, flux creep, and flux-line lattice dynamics
© EDP Sciences, 1996