Experimental evidence of quantum radiation reaction in aligned crystals

Nature Communications
Tobias N WistisenUlrik I Uggerhøj

Abstract

Quantum radiation reaction is the influence of multiple photon emissions from a charged particle on the particle's dynamics, characterized by a significant energy-momentum loss per emission. Here we report experimental radiation emission spectra from ultrarelativistic positrons in silicon in a regime where quantum radiation reaction effects dominate the positron's dynamics. Our analysis shows that while the widely used quantum approach is overall the best model, it does not completely describe all the data in this regime. Thus, these experimental findings may prompt seeking more generally valid methods to describe quantum radiation reaction. This experiment is a fundamental test of quantum electrodynamics in a regime where the dynamics of charged particles is strongly influenced not only by the external electromagnetic fields but also by the radiation field generated by the charges themselves and where each photon emission may significantly reduce the energy of the charge.

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Citations

Apr 20, 2019·Physical Review. E·E S EfimenkoA M Sergeev
Jun 30, 2019·Scientific Reports·C BaumannI Yu Kostyukov
Jan 11, 2020·Physical Review Letters·Adrián E Rubio López, Oriol Romero-Isart
Feb 15, 2020·Physical Review Letters·A Di PiazzaU I Uggerhøj
Jun 20, 2020·Scientific Reports·K FleckG Sarri
Apr 25, 2018·Scientific Reports·Evgeny GelferAlexander Fedotov
May 31, 2019·Physical Review Letters·V YakimenkoG White
Sep 15, 2020··Eliahu CohenYaron Hadad

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