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VOLUME 26 | ISSUE 5 | PAGE 252
Rate of particle production in gravitational fields
The local rate of production of massless particles is calculated in a weakly anisotropic homogeneous cosmological model, and also in a weak inhomogeneous gravitational field, in which the condition q%> 0 is satisfied for the wave vectors of the nonzero Fourier components in second-order perturbation theory. The rate turns out to be proportional to the local values of the invariants of the curvature tensor.




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