Stochasticity in radiative polarization of ultrarelativistic electrons in an 
ultrastrong laser pulse

Guo, Ren-Tong; Wang, Yu; Shaisultanov, Rashid; Wan, Feng; Xu, Zhong-Feng; Chen, Yue-Yue; Hatsagortsyan, Karen Zaven; Li, Jian-Xing

doi:10.1103/PhysRevResearch.2.033483

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Stochasticity in radiative polarization of ultrarelativistic electrons in an ultrastrong laser pulse

MPS-Authors

Guo, Ren-Tong
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China;
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

Wang, Yu
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China;
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Shaisultanov, Rashid
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

Chen, Yue-Yue
Department of Physics, Shanghai Normal University, Shanghai 200234, China;
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Hatsagortsyan, Karen Zaven
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

Li, Jian-Xing
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China;
Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society;

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Citation

Guo, R.-T., Wang, Y., Shaisultanov, R., Wan, F., Xu, Z.-F., Chen, Y.-Y., et al. (2020). Stochasticity in radiative polarization of ultrarelativistic electrons in an ultrastrong laser pulse. Physical Review Research, 2(3): 033483. doi:10.1103/PhysRevResearch.2.033483.

Cite as: https://hdl.handle.net/21.11116/0000-0007-1CC3-E

Abstract

Stochasticity effects in the spin (de)polarization of an ultrarelativistic
electron beam during photon emissions in a counterpropoagating ultrastrong
focused laser pulse in the quantum radiation reaction regime are investigated.
We employ a Monte Carlo method to describe the electron dynamics
semiclassically, and photon emissions as well as the electron radiative
polarization quantum mechanically. While in the latter the photon emission is
inherently stochastic, we were able to identify its imprints in comparison with
the new developed semiclassical stochasticity-free method of radiative
polarization applicable in the quantum regime. With an initially spin-polarized
electron beam, the stochastic spin effects are seen in the dependence of the
depolarization degree on the electron scattering angle and the electron final
energy (spin stochastic diffusion). With an initially unpolarized electron
beam, the spin stochasticity is exhibited in enhancing the known effect of
splitting of the electron beam along the propagation direction into two
oppositely polarized parts by an elliptically polarized laser pulse. The
considered stochasticity effects for the spin are observable with currently
achievable laser and electron beam parameters.