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  • Letter
  • Open Access

Synchrotron radiation by slowly rotating fermions

Matteo Buzzegoli, Jonathan D. Kroth, Kirill Tuchin, and Nandagopal Vijayakumar

  • Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

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Phys. Rev. D 107, L051901 – Published 21 March, 2023

DOI: https://doi.org/10.1103/PhysRevD.107.L051901

Abstract

We study the synchrotron radiation emitted by a charged fermion, rotating as a part of a larger system, in a constant magnetic field B parallel to the axis of rotation. The rotation is classical and independent of the magnetic field. The angular velocity of rotation Ω is assumed to be much smaller than the inverse magnetic length qB, which allows us to ignore the boundary effects at r=1/Ω. We refer to such rotation as slow, even though in absolute value it may be an extremely rapid rotation. Using the exact solution of the Dirac equation, we derived the intensity of electromagnetic radiation, its spectrum, and its chirality. We demonstrate by explicit numerical calculation that the effect of rotation on the radiation intensity increases with the particle energy. Depending on the relative orientation of the vectors Ω and B and the sign of the electric charge, the rotation can either strongly enhance or strongly suppress the radiation.

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Corrections

18 October, 2023

Correction: A typographical error in the value in the last sentence in the 11th paragraph has been fixed. Errors in the qB values presented in the captions of Figs. 1–3 have been set right. In the sixth, eighth, and ninth sentences of the 12th paragraph, the original wording “suppression” was replaced by “enhancement,” “smaller” was replaced by “larger,” and “enhancement” was replaced by “suppression,” respectively. In the second sentence of the 16th paragraph, the original wording “positive” was replaced by “negative” and “negative” was replaced by “positive.”

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Outline

Information

Phys. Rev. D 107, L051901– Published 21 March, 2023
  • Received 12 September 2022
  • Revised 4 November 2022
  • Accepted 9 March 2023
  • Corrected 18 October 2023
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