The trace left by signature-change-induced compactification

Details The trace left by signature-change-induced compactification The trace left by signature-change-induced compactification

1994-11-11

arxiv.org/abs/gr-qc/9411028v1

Class.Quant.Grav.12:1723-1732,1995

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, LaTeX, no figures

Scientific paper

10.1088/0264-9381/12/7/014

Recently, it has been shown that an infinite succession of classical signature changes (''signature oscillations'') can compactify and stabilize internal dimensions, and simultaneously leads, after a coarse graining type of average procedure, to an effective (''physical'') space-time geometry displaying the usual Lorentzian metric signature. Here, we consider a minimally coupled scalar field on such an oscillating background and study its effective dynamics. It turns out that the resulting field equation in four dimensions contains a coupling to some non-metric structure, the imprint of the ''microscopic'' signature oscillations on the effective properties of matter. In a multidimensional FRW model, this structure is identical to a massive scalar field evolving in its homogeneous mode.

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