251 citations · 4k across the 73 of their papers we have counts for
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Resurgence and Holomorphy: From Weak to Strong Coupling
Aleksey Cherman, Peter Koroteev, Mithat Ünsal
We analyze the resurgence properties of finite-dimensional exponential integrals which are prototypes for partition functions in quantum field theories. In these simple examples, w…
Real-Time Feynman Path Integral Realization of Instantons
Aleksey Cherman, Mithat Unsal
In Euclidean path integrals, quantum mechanical tunneling amplitudes are associated with instanton configurations. We explain how tunneling amplitudes are encoded in real-time Feyn…
Decoding perturbation theory using resurgence: Stokes phenomena, new saddle points and Lefschetz thimbles
Aleksey Cherman, Daniele Dorigoni, Mithat Unsal
Resurgence theory implies that the non-perturbative (NP) and perturbative (P) data in a QFT are quantitatively related, and that detailed information about non-perturbative saddle…
Uniform WKB, Multi-instantons, and Resurgent Trans-Series
Gerald V. Dunne, Mithat Unsal
We illustrate the physical significance and mathematical origin of resurgent trans-series expansions for energy eigenvalues in quantum mechanical problems with degenerate harmonic…