The Weyl curvature hypothesis and a choice of the initial vacuum for quantum fields at the cosmological singularity
- 1 January 1994
- journal article
- letter
- Published by IOP Publishing in Classical and Quantum Gravity
- Vol. 11 (1) , L15-L21
- https://doi.org/10.1088/0264-9381/11/1/004
Abstract
The meaning of the Weyl curvature hypothesis as a condition to prevent vacuum instability and infinite particle creation at the cosmological singularity is discussed. The restriction on the isotropic expansion law is obtained from the same reasoning which leads to the hypothesis that the Ricci scalar curvature must tend to zero when the singularity is approached.Keywords
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