New nonlocal effective action
A.O.Barvinsky, V.F.Mukhanov
TL;DR
The paper introduces a novel nonperturbative method for calculating the nonlocal component of the effective action using heat kernel resummation, applicable to higher-dimensional spacetimes.
Contribution
It presents a new resummation technique for the heat kernel to compute the nonlocal effective action nonperturbatively in dimensions greater than two.
Findings
Derived a new nonlocal contribution to the effective action
Applicable to spacetimes with dimensions d>2
Provides a nonperturbative computational approach
Abstract
We suggest a new method for the calculation of the nonlocal part of the effective action. It is based on resummation of perturbation series for the heat kernel and its functional trace at large values of the proper time parameter. We derive a new, essentially nonperturbative, nonlocal contribution to the effective action in spacetimes with dimensions .
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