Geometric gauge fields, particle production, and time

Details Geometric gauge fields, particle production, and time Geometric gauge fields, particle production, and time

Aug 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrvd..50.2605d&link_type=abstract

Physical Review D, vol. 50, Issue 4, pp. 2605-2608

Physics

6

Lower Dimensional Models, Minisuperspace Models

Scientific paper

The geometric magnetic- and electric-type fields are shown to have nontrivial effects in the form of semiclassical back reactions from quantized matter fields on the adiabatically evolving classical background geometry. As a consequence of the gauge invariance of the induced reaction forces it then follows that the matter vacuum polarization in a space-time emerging out from a flat simply connected superspace does not have a gravitational effect. However, the vacuum instability and the associated particle production do have a nonzero back reaction which gets encoded in the electric scalar potential. The relationship between the standard semiclassical definition of time and the existence of a nontrivial Berry phase is also explored. This offers an interesting constraint on the initial quantum state of the Universe.

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