Robuta

https://www.arxiv.org/abs/1407.0987
Abstract page for arXiv paper 1407.0987: World-line instantons and the Schwinger effect as a WKB exact path integral
world lineschwinger effectinstantons
https://physicsworld.com/a/schwinger-effect-appears-in-a-2d-superfluid/
Oct 2, 2025 - Physicists model vacuum tunnelling in a simple system
schwinger effectphysics worldappearssuperfluid