Radiative deflection by spin effect in the quantum radiation-reaction regime

Authors :: Geng, X. S.
Ji, L. L.
Shen, B. F.
Feng, B.
Guo, Z.
Han, Q. Q.
Qin, C. Y.
Wang, N. W.
Wang, W. Q.
Wu, Y. T.
Yan, X.
Yu, Q.
Zhang, L. G.
Xu, Z. Z.
Publication Year :: 2019
Abstract: The colliding between ultra-relativistic electrons and an ultra-intense laser pulse is a powerful approach to testify the physics in strong-field QED regime. By considering spin-dependent radiation-reaction during laser-electron collision we find anti-symmetric deflection of electrons with different spin states. We revealed that such deflection is induced by the non-zero work done by radiation-reaction force along field polarization-direction in a half-period of phase, which is larger for spin-anti-paralleled electrons and smaller for spin-paralleled electrons. The spin-projection on the magnetic field of an electron gets inversed in adjacent half-periods due to oscillating magnetic field and therefore the deflection due to spin-dependent radiation is accumulated rather than vanishing. The new mechanism provides an extra dimension to observe quantum radiation-reaction effect in the strong-field QED regime by measuring the anti-symmetric distribution.<br />Comment: 5 pages, 4 figures