Classical and quantum radiation from a moving charge in an expanding universe
arXiv:gr-qc/0611066 · doi:10.1088/1475-7516/2006/11/013
Abstract
We investigate photon emission from a moving particle in an expanding universe. This process is analogous to the radiation from an accelerated charge in the classical electromagnetic theory. Using the framework of quantum field theory in curved spacetime, we demonstrate that the Wentzel-Kramers-Brillouin (WKB) approximation leads to the Larmor formula for the rate of the radiation energy from a moving charge in an expanding universe. Using exactly solvable models in a radiation-dominated universe and in a Milne universe, we examine the validity of the WKB formula. It is shown that the quantum effect suppresses the radiation energy in comparison with the WKB formula.
arXiv comment16 pages, JCAP in press
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- Interaction between Maxwell field and charged scalar field in de Sitter universe
- Quantum Larmor radiation in conformally flat universe
- Quantum radiation from a particle in an accelerated motion coupled to vacuum fluctuations
- First-order quantum correction to the Larmor radiation from a moving charge in a spatially homogeneous time-dependent electric field
- Classical and quantum radiation reaction in conformally flat spacetime
- Radiation of inertial scalar particles in the de Sitter universe
- One-photon pair production on the expanding de Sitter spacetime
- Gauge dependence in QED amplitudes in expanding de Sitter space
- Quantum Larmor radiation in de Sitter spacetime
- Late-time quantum radiation by a uniformly accelerated detector in de Sitter spacetime