The Intense Radiation Gas
arXiv:hep-ph/0410203 · doi:10.1209/epl/i2004-10503-0
Abstract
We present a new dispersion relation for photons that are nonlinearly interacting with a radiation gas of arbitrary intensity due to photon-photon scattering. It is found that the photon phase velocity decreases with increasing radiation intensity, it and attains a minimum value in the limit of super-intense fields. By using Hamilton's ray equations, a self-consistent kinetic theory for interacting photons is formulated. The interaction between an electromagnetic pulse and the radiation gas is shown to produce pulse self-compression and nonlinear saturation. Implications of our new results are discussed.
7 pages, 1 figure, version to appear in Europhys. Lett
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- Photon acceleration in vacuum
- Photon gas dynamics in the early universe