Dr. Antonino Di Piazza, Max Planck Institute for Nuclear Physics
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Abstract: The problem of radiation reaction is probably the oldest and most controversial issue in electrodynamics. Within the realm of classical electrodynamics it amounts in finding the equation of motion of an electric charge, which takes into account that the charge, while being accelerated, emits electromagnetic radiation and loses energy and momentum. The resulting equation, known as Lorentz-Abraham-Dirac (LAD) equation, is highly controversial as it is plagued by physical inconsistencies (runaway solutions, violation of causality) [1]. After an historical introduction on the derivation of the LAD equation, I will then focus on the LandauLifshitz equation, which is derived from the LAD equation but it is free of the LAD equation’s inconsistencies, and it is now widely considered as the best candidate equation to take into account classical radiation reaction. In the second part of the talk, I will move to more modern aspects of radiation reaction as its interpretation within the more fundamental theory of quantum electrodynamics [2] as well as to the recent efforts to observe radiation reaction experimentally by means of intense laser fields [3, 4] and channeling in crystals [5].
References
[1] F. Rohrlich. Classical Charged Particles. World Scientific, Singapore, 2007.
[2] A. Di Piazza, et al.. Rev. Mod. Phys., 84:1177, 2012.
[3] J. M. Cole, et al.. Phys. Rev. X, 8:011020, 2018.
[4] K. Poder, et al.. Phys. Rev. X, 8:031004, 2018.
[5] T. N. Wistisen, et al.. Nat. Commun., 9:795, 2018.