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Particle creation in inhomogeneous spacetimes

Journal Article · · Phys. Rev. D; (United States)
We study the creation of particles by inhomogeneous perturbations of spatially flat Friedmann-Robertson-Walker cosmologies. For massless scalar fields, the pair-creation probability can be expressed in terms of geometric quantities (curvature invariants). The results suggest that inhomogeneities on scales up to the particle horizon will be damped out near the Planck time. Perturbations on scales larger than the horizon are explicitly shown to yield no created pairs. The results generalize to inhomogeneous spacetimes several earlier studies of pair creation in homogeneous anisotropic cosmologies.
Research Organization:
Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
OSTI ID:
6538847
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 39:2; ISSN PRVDA
Country of Publication:
United States
Language:
English