Particle creation in cosmology.
Abstract
The quantum effect of particle creation in strong, time-varying gravitational fields is depicted as a possible mechanism for the isotropy of the universe. This effect arises when one considers the quantization of fields (in particular, radiation fields) in curved space-time, i.e., in a background gravitational field. It is shown that particle creation is especially significant near a singularity of the most general type - an anisotropic singularity. Three consequences of particle creation are noted: (1) a rapid isotropization of cosmological expansion after a certain critical moment; (2) smallness of primordial rotational metric perturbations; and (3) the impossibility of long delay of cosmological white hole explosions.
- Publication:
-
Energy and Physics
- Pub Date:
- 1976
- Bibcode:
- 1976enph.conf..209N
- Keywords:
-
- Astronomical Models;
- Cosmology;
- Gravitational Effects;
- Particle Production;
- Singularity (Mathematics);
- Anisotropy;
- Gravitational Fields;
- Quantum Mechanics;
- Space-Time Functions;
- White Holes (Astronomy);
- Astrophysics