Expectation values and vacuum currents of quantum fields

Details Expectation values and vacuum currents of quantum fields Expectation values and vacuum currents of quantum fields

2007-12-20

arxiv.org/abs/0712.3379v1

Lect. Notes Phys.737:729-784, 2008

Physics

High Energy Physics

High Energy Physics - Theory

The course of 4 lectures given at College de France in May 2006. 56 pages

Scientific paper

Theory of expectation values is presented as an alternative to S-matrix
theory for quantum fields. This change of emphasis is conditioned by a
transition from the accelerator physics to astrophysics and cosmology. The
issues discussed are the time-loop formalism, the Schwinger - Keldysh diagrams,
the effective action, the vacuum currents, and the effect of particle creation.

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