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arXiv · 1901.10641

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

X. S. Geng·L. L. Ji·B. F. Shen·B. Feng·Z. Guo·Q. Q. Han·C. Y. Qin·N. W. Wang·W. Q. Wang·Y. T. Wu·X. Yan·Q. Yu·L. G. Zhang·Z. Z. Xu
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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.

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X. S. Geng, L. L. Ji, B. F. Shen, B. Feng, Z. Guo, Q. Q. Han, C. Y. Qin, N. W. Wang, W. Q. Wang, Y. T. Wu, X. Yan, Q. Yu, L. G. Zhang, Z. Z. Xu. 2019-01-30. Radiative deflection by spin effect in the quantum radiation-reaction regime. https://doi.org/10.1088/1367-2630/ab623b

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