Radiative polarization dynamics of relativistic electrons in an intense electromagnetic field

Tang, Yuxing; Gong, Zheng; Yu, Jinqing; Shou, Yinren; Yan, Xueqing

doi:10.1103/physreva.103.042807

Cited by 19 publications

(16 citation statements)

References 60 publications

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“…Parallel to the development of this Mueller matrix approach, some PIC codes started taking spin and polarisation of particles into account also using Stokes vectors, see e.g. [238,239,319,320] and further discussion in Sec. 6.…”

Section: Intermediate Particle Polarization Sums In the Two-stepmentioning

confidence: 99%

Advances in QED with intense background fields

Fedotov¹,

Ilderton²,

Karbstein³

et al. 2022

Preprint

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Upcoming and planned experiments combining increasingly intense lasers and energetic particle beams will access new regimes of nonlinear, relativistic, quantum effects. This improved experimental capability has driven substantial progress in QED in intense background fields. We review here the advances made during the last decade, with a focus on theory and phenomenology. As ever higher intensities are reached, it becomes necessary to consider processes at higher orders in both the number of scattered particles and the number of loops, and to account for non-perturbative physics (e.g. the Schwinger effect), with extreme intensities requiring resummation of the loop expansion. In addition to increased intensity, experiments will reach higher accuracy, and these improvements are being matched by developments in theory such as in approximation frameworks, the description of finite-size effects, and the range of physical phenomena analysed. Topics on which there has been substantial progress include: radiation reaction, spin and polarisation, nonlinear quantum vacuum effects and connections to other fields including physics beyond the Standard Model.

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Section: Intermediate Particle Polarization Sums In the Two-stepmentioning

confidence: 99%

Advances in QED with intense background fields

Fedotov¹,

Ilderton²,

Karbstein³

et al. 2022

Preprint

View full text Add to dashboard Cite

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“…The stochastic nature of high-energy photon emission becomes important in the quantum regime, so a Monte-Carlo method is more appropriate for simulations [56]. Therefore, to investigate the spin polarization distribution of the scattered electrons, we develop a polarization-vector-based Monte-Carlo code [57,58], where both nonlinear Compton scattering and classical spin precession (i.e., Thomas-Bargmann-Michel-Telegdi equation [59][60][61]) are considered.…”

Section: Simulation Methods and Setupsmentioning

confidence: 99%

“…Besides, the polarization evolves under the combined effect of the classical spin precession and the no-photon-emission part of radiation effect at all times [58], i.e.…”

Section: ∆S =mentioning

confidence: 99%

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Production of multi-oriented polarization for relativistic electron beams via a mutable filter for nonlinear Compton scattering

Tang¹,

Ma²,

Yu³

et al. 2022

Preprint

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We propose a feasible scenario to directly polarize a relativistic electron beam and obtain overall polarization in various directions through a filter mechanism for single-shot collision between an ultrarelativistic unpolarized electron beam and an ultraintense circularly polarized laser pulse. The electrons are scattered to a large angular range of several degrees and the polarization states of the electrons are connected with their spatial position after the collision. Therefore, we can employ a filter to filter out a part of the scattered electrons based on their position and obtain high-degree overall polarization for the filtered beam. Through spin-considered Monte-Carlo simulations, polarization with a degree up to 62% in arbitrary transverse directions and longitudinal polarization up to 10% are obtained for the filtered beams at currently achievable laser intensity. We theoretically analyze the distribution formation of the scattered electrons and investigate the influence of different initial parameters through simulations to demonstrate the robustness of our scheme. This scenario provides a simple and flexible way to produce relativistic polarized electron beams for various polarization directions.

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“…The simulation method is the following [65]: The common statistical event generator is conducted at each simulation step to determine whether or not a photon-emission occurs. If a photon-emission occurs, the emitted photon energy is determined via the stochastic procedure and spectral probability, while the electron and photon polarizations via the averaged algorithm involving the density matrix for the mixed state of an electron ensemble [59,66] to reduce the statistical fluctuation. If the photon-emission event is rejected, the electron spin changes according to the non-radiation probability [14,59].…”

mentioning

confidence: 99%

Helicity transfer in strong laser fields via the electron anomalous magnetic moment

Li,

Chen,

Hatsagortsyan

et al. 2021

Preprint

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Electron beam longitudinal polarization during the interaction with counterpropagating circularly-polarized ultraintense laser pulses is investigated, while accounting for the anomalous magnetic moment of the electron. Although it is known that the helicity transfer from the laser photons to the electron beam is suppressed in linear and nonlinear Compton scattering processes, we show that the helicity transfer nevertheless can happen via an intermediate step of the electron radiative transverse polarization, phase-matched with the driving field, followed up by spin rotation into the longitudinal direction as induced by the anomalous magnetic moment of the electron. With spin-resolved QED Monte Carlo simulations, we demonstrate the consequent helicity transfer from laser photons to the electron beam with a degree up to 10%, along with an electron radial polarization up to 65% after multiple photon emissions in a femtosecond timescale. This effect is detectable with currently achievable laser facilities and provides this way a measurable signature of the electron anomalous magnetic moment.

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Radiative polarization dynamics of relativistic electrons in an intense electromagnetic field

Cited by 19 publications

References 60 publications

Advances in QED with intense background fields

Advances in QED with intense background fields

Production of multi-oriented polarization for relativistic electron beams via a mutable filter for nonlinear Compton scattering

Helicity transfer in strong laser fields via the electron anomalous magnetic moment

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