Inflation driven by causal heat flux

Abstract

We find a simple inflationary solution in an inhomogeneous spacetime with heat flux. The heat flux obeys a causal transport equation, and counteracts the inflationary decrease of energy density. At late times, the heat flux tends to zero and the fluid approaches the equation of state $p=-\rho$.

Latex 5 pages; to appear Gen. Rel. Grav

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