2 papers
hep-th2026
Variable-mass sine-Gordon with point defects: integrability, soliton transmission, and quasi-conservation
A. R. Aguirre, H. Blas, H. F. Callisaya +1
We study integrable variable-mass sine-Gordon model (vmSG) with point defects. Using the Lax and Bäcklund-gauge formulations, we construct type-I and type-II defect matrices, deriv…
hep-th2025
Riccati-type pseudo-potential approach to quasi-integrability of deformed soliton theories
Harold Blas
This review paper explores the Riccati-type pseudo-potential formulation applied to the quasi-integrable sine-Gordon, KdV, and NLS models. The proposed framework provides a unified…