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Published online by Cambridge University Press: 07 February 2017
Inhomogeneous generalizations of the Kasner cosmological models have been found by Gowdy, and can be used to exhibit simplified models of quantized gravitational fields. One finds that a quantum description can be given arbitrarily near the singularity. Graviton pair creation occurs, and can be seen to convert anisotropic expansion rates into the energy of graviton pairs.