Real-Time Instantons and Suppression of Collision-Induced Tunneling

Abstract

We consider tunneling processes in QFT induced by collisions of elementary particles. We propose a semiclassical method for estimating the probability of these processes in the limit of very high collision energy. As an illustration, we evaluate the maximum probability of induced tunneling between different vacua in a (1+1)-dimensional scalar model with boundary interaction.

arXiv comment5 pages, 1 figure, JETP Letters style

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• Suppression exponent for multiparticle production in $\lambda {\varphi }^4$ theory
• Long quantum transition times due to unstable semiclassical dynamics
• High-energy limit of collision-induced false vacuum decay