paper

Enhancement of particle creation in nonlinear resonant cavities

arXiv:2209.10462 · doi:10.1103/PhysRevD.107.065004

Abstract

The rate of particle creation in a resonantly oscillating cavity is known to be approximately constant at large evolution times. Employing the Schwinger-Keldysh diagrammatic technique, we show that nonlinear interactions generate nonzero quantum averages and significantly enhance this rate. To illustrate this phenomenon, we consider a massless scalar field with a quartic interaction in a one-dimensional cavity with perfectly reflecting walls oscillating at twice the fundamental frequency.

8 pages, 2 figures. v2: several amendments made

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