Tuesday, June 25, 2013

1306.5549 (Sang Pyo Kim)

New Geometric Transition as Origin of Particle Production in
Time-Dependent Backgrounds

Sang Pyo Kim
By extending the quantum evolution of a scalar field in time-dependent backgrounds to the complex-time plane and transporting the in-vacuum along a closed path, we argue that the geometric transition from the simple pole at infinity determines the multi-pair production depending on the winding number. We apply the geometric transition to Schwinger mechanism in the time-dependent vector potential for a constant electric field and to Gibbons-Hawking particle production in the planar coordinates of a de Sitter space.
View original: http://arxiv.org/abs/1306.5549

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