A note on the thermodynamics of gravitational radiation
arXiv:gr-qc/0305030 · doi:10.1088/0264-9381/20/20/307
Abstract
It is shown that linearized gravitational radiation confined in a cavity can achieve thermal equilibrium if the mean density of the radiation and the size of the cavity satisfy certain constraints.
8 pages; discussion expanded and some issues clarified; revised version accepted for publication in Classical and Quantum Gravity