期刊论文详细信息
The European Physical Journal C
Quantum Larmor radiation in de Sitter spacetime
Robert Blaga1  Sergiu Busuioc1 
[1] West University of Timişoara, V. Pârvan Ave. 4, 300223, Timisoara, Romania;
关键词: Flat Space;    Flat Spacetime;    Conformal Time;    Maxwell Field;    Unit Solid Angle;   
DOI  :  10.1140/epjc/s10052-016-4341-0
来源: Springer
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【 摘 要 】

We study the radiation emitted by inertial charge evolving on the expanding de Sitter spacetime. Performing a perturbative calculation, within scalar quantum electrodynamics (sQED), we obtain the transition amplitude for the process and using this we define the energy radiated by the source. In the non-relativistic limit we find that the leading term is compatible with the classical result (Larmor formula). The first quantum correction is found to be negative, a result which is in line with a number of similar quantum field theory results. For the ultra-relativistic case we find a logarithmic divergence of the emitted energy for large frequencies, which we link to the nature of the spacetime. We compare our results with that of Nomura et al. (JCAP 11:013, 2006), where the authors make a similar calculation for a general conformally flat spacetime.

【 授权许可】

CC BY   

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