3 papers
hep-th2025
Instantons meet resonances: Unifying two seemingly distinct approaches to quantum tunneling
Björn Garbrecht, Nils Wagner
In the study of quantum-mechanical tunneling processes, numerous approaches have been developed to determine the decay rate of states initially confined within a metastable potenti…
hep-th2025
False vacuum decay of excited states in finite-time instanton calculus
Björn Garbrecht, Nils Wagner
Extracting information about a system's metastable ground state energy employing functional methods usually hinges on utilizing the late-time behavior of the Euclidean propagator,…
hep-th2025
Path integral analysis of Schrödinger-type eigenvalue problems in the complex plane: Establishing the relation between instantons and resonant states
Björn Garbrecht, Nils Wagner
Schrödinger-type eigenvalue problems are ubiquitous in theoretical physics, with quantum-mechanical applications typically confined to cases for which the eigenfunctions are requi…