Abstract
The production of particles by gravitational fields is calculated within the framework of quantum field theory. It turns out that the expansion of the universe—giving rise to a time-dependent gravitational field—does not lead to an appreciable production at present, since the frequencies involved are too low. Particle production was, however, of importance during the first sec after a "big bang." This mechanism of particle creation leads to equal numbers of particles and antiparticles.
- Received 27 May 1968
DOI:https://doi.org/10.1103/PhysRev.179.1247
©1969 American Physical Society