3 papers
hep-th2026
The Double Well Done Doubly-Well
Aurélien Dersy, Matthew D. Schwartz
The symmetric double-well potential is one of the simplest quantum-mechanical systems in which perturbative and non-perturbative physics are deeply entangled. Its energy levels hav…
hep-th2026
Beyond the Dilute Instanton Gas: Resurgence with Exact Saddles in the Double Well
Aurélien Dersy, Matthew D. Schwartz
The path-integral approach to the double well has long been limited by the dilute instanton gas approximation. We show that if the finite Euclidean-time structure is taken seriousl…
hep-ph2024
The Landau Bootstrap
Holmfridur Hannesdottir, Andrew McLeod, Matthew D. Schwartz +1
We advocate a strategy of bootstrapping Feynman integrals from just knowledge of their singular behavior. This approach is complementary to other bootstrap programs, which exploit…