Quantum vacuum inversion and multi-kink unbinding in the non-degenerate double sine-Gordon model
Year: 2026
Type: preprint
Abstract: Quantum fluctuations can unbind a composite soliton while the correction to its mass stays small. We show this beyond perturbation theory for the multi-kinks of the non-degenerate double sine-Gordon model. At one loop the vacuum at the centre of the multi-kink becomes the true vacuum at a coupling of order the classical lifting of the vacua. Tensor-network calculations of the lattice theory show that this inversion survives beyond one loop and has a continuum limit, and that the Gaussian effective potential captures it. On finite chains the multi-kink unbinds when the tension of the string of central vacuum between its two halves falls through zero
Source: arXiv (Cornell University)
Author: Lozano-Mayo, Jonathan
Institution: The University of Texas at Austin
Language: English
Topic: Nonlinear Waves and Solitons
Subfield: Statistical and Nonlinear Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7214032560