Spin radiative corrections to the radiation probability and power in classical and quantum electrodynamics

2016 ◽  
Vol 122 (4) ◽  
pp. 650-662 ◽  
Author(s):  
S. L. Lebedev
Keyword(s):  
Quantum Electrodynamics ◽  
Radiative Corrections ◽  
Radiation Probability

scholarly journals Strongly Magnetized Sources: QED and X-ray Polarization

Galaxies ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 76 ◽  
Author(s):  
Jeremy Heyl ◽  
Ilaria Caiazzo
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
First Principles ◽  
Quantum Electrodynamics ◽  
Polarization State ◽  
Radiative Corrections ◽  
Strong Magnetic Fields ◽  
X Ray ◽  
The Difference

Radiative corrections of quantum electrodynamics cause a vacuum threaded by a magnetic field to be birefringent. This means that radiation of different polarizations travels at different speeds. Even in the strong magnetic fields of astrophysical sources, the difference in speed is small. However, it has profound consequences for the extent of polarization expected from strongly magnetized sources. We demonstrate how the birefringence arises from first principles, show how birefringence affects the polarization state of radiation and present recent calculations for the expected polarization from magnetars and X-ray pulsars.

Gyromagnetic factors of bound particles with arbitrary spin in quantum electrodynamics

2002 ◽  
Vol 80 (11) ◽  
pp. 1365-1372
Author(s):  
R N Faustov ◽  
A P Martynenko
Keyword(s):  
Hydrogen Atom ◽  
Magnetic Moment ◽  
Quantum Electrodynamics ◽  
Bound State ◽  
Arbitrary Spin ◽  
Radiative Corrections ◽  
Particle Spin ◽  
G Factors

A quasipotential method is formulated for calculating relativistic and radiative corrections to the magnetic moment of a two-particle bound state in the case of particles with arbitrary spin. It is shown that the g factors of bound particles contain O(α2) terms depending on the particle spin. Numerical values for the g factors of the electron in the hydrogen atom and deuterium are obtained. PACS Nos.: 31.30Jv, 12.20Ds, 32.10Dk

Derivation of the external field in the Dirac equation based on quantum electrodynamics

1983 ◽  
Vol 61 (1) ◽  
pp. 85-92 ◽  
Author(s):  
A. R. Neghabian ◽  
W. Glöckle
Keyword(s):  
Dirac Equation ◽  
External Field ◽  
Quantum Electrodynamics ◽  
Heavy Particle ◽  
External Potential ◽  
Radiative Corrections ◽  
The Individual

The multiphoton exchange between two charged spin [Formula: see text] particles of light (m) and heavy (M) mass is considered and it is shown how, in the limit M → ∞, the Dirac equation with an external potential including radiative corrections emerges. This result can only be achieved if diagrams with photons attached to the heavy particle line cancel among themselves for M → ∞. We have shown this in the lowest order where the individual diagrams have nonvanishing limits.

ON THE LAGRANGIAN OF A RELATIVISTIC SPINNING PARTICLE IN QUANTUM ELECTRODYNAMICS

1991 ◽  
Vol 06 (09) ◽  
pp. 805-810 ◽  
Author(s):  
SH. M. SHVARTSMAN
Keyword(s):  
Quantum Electrodynamics ◽  
Radiative Corrections ◽  
Spinning Particle ◽  
Particle Action

It is shown that the relativistic spinning particle action that takes into account all radiative corrections can be constructed in reparametrization invariant and local supersymmetric form.

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