| Autor: |
Li, Y., Chen, Y., Hatsagortsyan, K., Di Piazza, A., Tamburini, M., Keitel, C. |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Physical Review D |
| Popis: |
The polarization dynamics of electrons including multiple nonlinear Comptonscattering during the interaction of a circularly-polarized ultraintense laserpulse with a counterpropagating ultrarelativistic electron beam isinvestigated. While electron polarization emerges mostly due to spin-flips atphoton emissions, there is a non-radiative contribution to the polarizationwhich stems from the one-loop QED radiative corrections to the self-energy,which admits of a simple physical model. We put forward a method to single outthe non-radiative contribution to the polarization, employing the reflectionregime of the interaction when the radiation reaction is significant. Thepolarization of electrons that penetrate in the forward direction through acolliding laser is shown to be dominated by the loop effect, while thereflected electrons are mostly polarized by spin-flips at photon emissions. Weconfirm this effect by quantum Monte Carlo simulations considering the helicitytransfer from the laser field to the electrons, taking into account theopposite sign of the polarizations induced by the non-radiative loop effect andradiative spin-flip. Our Monte Carlo simulations show a polarization signal ashigh as $\gtrsim 10\%$ from the non-radiative effect, amenable for experimentaldetection with current technology. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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