TY - JOUR

T1 - Quantum Larmor radiation from a moving charge in an electromagnetic plane wave background

AU - Nakamura, Gen

AU - Yamamoto, Kazuhiro

N1 - Funding Information:
We thank S. Iso, S. Zhang, T. Kato, K. Homma and T. Takahashi for useful conversation related to the topic in the present paper. This work was supported by a Grant-in-Aid for Scientific research of the Japanese Ministry of Education, Culture, Sports, Science and Technology (No. 21540270 and No. 21244033) and in part by the Japan Society for Promotion of Science (JSPS) Core-to-Core Program “International Research Network for Dark Energy.” G. Nakamura was supported by Grant-in-Aid for Japan Society for Promotion of Science (JSPS) Fellows (No. 236669).

PY - 2012/9/30

Y1 - 2012/9/30

N2 - We extend our previous work [Phys. Rev. D 83, 045030 (2011)], which investigated the first-order quantum effect in the Larmor radiation from a moving charge in a spatially homogeneous time-dependent electric field. Specifically, we investigate the quantum Larmor radiation from a moving charge in a monochromatic electromagnetic plane wave background based on the scalar quantum electrodynamics at the lowest order of the perturbation theory. Using the inin formalism, we derive the theoretical formula of the total radiation energy from a charged particle in the initial states being at rest and being in a relativistic motion. Expanding the theoretical formula in terms of the Planck constant ℏ, we obtain the first-order quantum effect on the Larmor radiation. The quantum effect generally suppresses the total radiation energy compared with the prediction of the classical Larmor formula, which is a contrast to the previous work. The reason is explained by the fact that the radiation from a moving charge in a monochromatic electromagnetic plane wave is expressed in terms of the inelastic collisions between an electron and photons of the background electromagnetic waves.

AB - We extend our previous work [Phys. Rev. D 83, 045030 (2011)], which investigated the first-order quantum effect in the Larmor radiation from a moving charge in a spatially homogeneous time-dependent electric field. Specifically, we investigate the quantum Larmor radiation from a moving charge in a monochromatic electromagnetic plane wave background based on the scalar quantum electrodynamics at the lowest order of the perturbation theory. Using the inin formalism, we derive the theoretical formula of the total radiation energy from a charged particle in the initial states being at rest and being in a relativistic motion. Expanding the theoretical formula in terms of the Planck constant ℏ, we obtain the first-order quantum effect on the Larmor radiation. The quantum effect generally suppresses the total radiation energy compared with the prediction of the classical Larmor formula, which is a contrast to the previous work. The reason is explained by the fact that the radiation from a moving charge in a monochromatic electromagnetic plane wave is expressed in terms of the inelastic collisions between an electron and photons of the background electromagnetic waves.

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U2 - 10.1142/S0217751X12501424

DO - 10.1142/S0217751X12501424

M3 - Article

AN - SCOPUS:84867055681

VL - 27

JO - International Journal of Modern Physics A

JF - International Journal of Modern Physics A

SN - 0217-751X

IS - 24

M1 - 12501424

ER -