Abstract
We establish a connection between the trace anomaly and thermal radiation in the standard cosmology. This is done by solving the covariant conservation equation of the stress tensor associated with a conformally invariant quantum scalar field. The solution corresponds to thermal radiation with a temperature which is given in terms of a cut-off time excluding the spacetime regions very close to the initial singularity. We discuss the interrelation between this result and the result obtained in a two-dimensional Schwarzschild spacetime.
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Bisabr, Y. Cosmological Implication of the Trace Anomaly. Int J Theor Phys 44, 283–291 (2005). https://doi.org/10.1007/s10773-005-2989-6
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DOI: https://doi.org/10.1007/s10773-005-2989-6