Spin of Scattered Electrons in the Nonlinear Compton Effect

Bol'shedvorsky, E.; Polityko, S. I.; Misaki, A.

doi:10.1143/ptp.104.769

Cited by 17 publications

(25 citation statements)

References 3 publications

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“…Namely, the function G 2 at ζ 1 = ζ 2 = 0 given in [14] and the functions G j for arbitrary ζ j obtained in [15] coincide with ours. However, the polarization vector ζ (f ) in the collider system is obtained in papers [14,15] only in the approximate form equivalent to our approximate equation (106).…”

Section: Summary and Comparison With Other Paperssupporting

confidence: 83%

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Complete description of polarization effects in emission of a photon by an electron in the field of a strong laser wave

2004

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Abstract. We consider emission of a photon by an electron in the field of a strong laser wave. Polarization effects in this process are important for a number of physical problems. The probability of this process for circularly or linearly polarized laser photons and for arbitrary polarization of all other particles is calculated. We obtain the complete set of functions which describe such a probability in a compact invariant form. Besides this, we discuss in some detail the polarization effects in the kinematics relevant to the problem of e → γ conversion at γγ and γe colliders.

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Section: Summary and Comparison With Other Paperssupporting

confidence: 83%

“…For these cases our results coincide with the above mentioned ones. For polarization of the final electron, our results differ slightly from those in [14,15]. Namely, the function G 2 at ζ 1 = ζ 2 = 0 given in [14] and the functions G j for arbitrary ζ j obtained in [15] coincide with ours.…”

Section: Summary and Comparison With Other Paperscontrasting

confidence: 80%

Complete description of polarization effects in emission of a photon by an electron in the field of a strong laser wave

2004

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“…Most studies of spinor QED refer to unpolarized electrons where the electron spin is averaged over. More detailed calculations of the non-linear Compton scattering probabilities with regard to the spin and spin polarization have been performed for monochromatic laser fields [24][25][26][27][28], short laser pulses [22,29,30], or constant crossed fields [31,32]. Moreover, in extremely strong fields electrons may polarize without radiating via electromagnetic self-interaction [33].…”

Section: Introductionmentioning

confidence: 99%

Theory of radiative electron polarization in strong laser fields

Seipt¹,

Sorbo²,

Ridgers³

et al. 2018

Phys. Rev. A

114

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Radiative polarization of electrons and positrons through the Sokolov-Ternov effect is important for applications in high-energy physics. Radiative spin polarization is a manifestation of quantum radiation reaction affecting the spin dynamics of electrons. We recently proposed that an analog of the Sokolov-Ternov effect could occur in the strong electromagnetic fields of ultra-high-intensity lasers, which would result in a buildup of spin polarization in femtoseconds. In this paper, we develop a density matrix formalism for describing beam polarization in strong electromagnetic fields. We start by using the density matrix formalism to study spin flips in nonlinear Compton scattering and its dependence on the initial polarization state of the electrons. Numerical calculations show a radial polarization of the scattered electron beam in a circularly polarized laser, and we find azimuthal asymmetries in the polarization patterns for ultrashort laser pulses. A degree of polarization approaching 9% is achieved after emitting just a single photon. We develop the theory by deriving a local constant crossed-field approximation (LCFA) for the polarization density matrix, which is a generalization of the well-known LCFA scattering rates. We find spin-dependent expressions that may be included in electromagnetic charged-particle simulation codes, such as particle-in-cell plasma simulation codes, using Monte Carlo modules. In particular, these expressions include the spin-flip rates for arbitrary initial polarization of the electrons. The validity of the LCFA is confirmed by explicit comparison with an exact QED calculation of electron polarization in an ultrashort laser pulse.

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“…Spin effects in laser-assisted Mott scattering and laser-assisted Möller scattering were investigated in [29,30] and [31], respectively. Polarization effects in the multiphoton Compton scattering were investigated in [32][33][34][35][36][37][38][39][40]. Transfer of polarization from the laser beam to positrons via Compton scattering and pair production is shown in [41].…”

Section: Introductionmentioning

confidence: 99%

Above-threshold ionization with highly charged ions in superstrong laser fields. III. Spin effects and their dependence on laser polarization

2015

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Spin effects in the tunneling regime of strong-field ionization of hydrogenlike highly charged ions in linearly as well as circularly polarized laser fields are investigated. The impact of the polarization of a laser field on the spin effects is analyzed. Spin-resolved differential ionization rates are calculated employing the relativistic Coulombcorrected strong-field approximation developed in the previous paper of the series. Analytical expressions for spin asymmetries and the spin-flip probability, depending on the laser's polarization, are obtained for the photoelectron momentum corresponding to the maximum of the tunneling probability. A simple intuitive model is developed for the description of spin dynamics in tunnel ionization. The spin flip is shown to be experimentally observable by using moderate highly charged ions with a charge of the order of 20 and a laser field with an intensity of I ∼ 10 22 W/cm 2 .

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Spin of Scattered Electrons in the Nonlinear Compton Effect

Cited by 17 publications

References 3 publications

Complete description of polarization effects in emission of a photon by an electron in the field of a strong laser wave

Complete description of polarization effects in emission of a photon by an electron in the field of a strong laser wave

Theory of radiative electron polarization in strong laser fields

Above-threshold ionization with highly charged ions in superstrong laser fields. III. Spin effects and their dependence on laser polarization

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