University of Birmingham > Talks@bham > Geometry and Mathematical Physics seminar > Asymptotics and Resurgence in String and Gauge Theories

Asymptotics and Resurgence in String and Gauge Theories

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If you have a question about this talk, please contact Timothy Magee.

The perturbative expansions of many physical quantities are divergent, and defined only as asymptotic series. It is well known that this divergence reflects the existence of nonperturbative, exponentially damped contributions, such as instanton effects, which are not captured by a perturbative analysis. This connection between perturbative and non-perturbative contributions of a given physical observable can be systematically studied using the theory of resurgence, allowing us to construct a full non-perturbative solution from perturbative asymptotic data. In this talk I will start by reviewing the essential role of resurgence theory in the description of the analytic solution behind an asymptotic series, and its relation to the so-called Stokes phenomena, phase transitions and ambiguity cancelations. I will then exemplify with some recent applications of resurgence in the context of string and gauge theories.

This talk is part of the Geometry and Mathematical Physics seminar series.

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