Vacuum polarization in nonpolynomial quantum electrodynamics at high energies

1975 ◽  
Vol 12 (1) ◽  
pp. 19-22
Author(s):  
A. Wataghin ◽  
M. La Camera
Keyword(s):  
Quantum Electrodynamics ◽  
Vacuum Polarization ◽  
High Energies

scholarly journals Energy spectra of muonic atoms in quantum electrodynamics

2019 ◽  
Vol 204 ◽  
pp. 05007 ◽  
Author(s):  
A. E. Dorokhov ◽  
A. A. Krutov ◽  
A. P. Martynenko ◽  
F. A. Martynenko ◽  
O. S. Sukhorukova
Keyword(s):  
Experimental Data ◽  
Perturbation Theory ◽  
Energy Spectrum ◽  
Hyperfine Structure ◽  
Nuclear Structure ◽  
Quantum Electrodynamics ◽  
Vacuum Polarization ◽  
Energy Spectra ◽  
Hyperfine Splittings ◽  
S States

Vacuum polarization, nuclear structure and recoil, radiative corrections to the hyperfine structure of S-states in muonic ions of lithium, beryllium and boron are calculated on the basis of quasipotential method in quantum electrodynamics. We consider contributions in first and second orders of perturbation theory which have the order α5 and α6 in the energy spectrum. Total values of hyperfine splittings are obtained which can be used for a comparison with future experimental data.

scholarly journals Scalar quantum electrodynamics via Duffin–Kemmer–Petiau gauge theory in the Heisenberg picture: Vacuum polarization

2018 ◽  
Vol 33 (10) ◽  
pp. 1850059 ◽  
Author(s):  
J. Beltran ◽  
N. T. Maia ◽  
B. M. Pimentel
Keyword(s):  
Gauge Theory ◽  
Quantum Electrodynamics ◽  
Vacuum Polarization ◽  
External Electromagnetic Field ◽  
Charged Scalar ◽  
Heisenberg Picture ◽  
Perturbative Method ◽  
Scalar Quantum ◽  
Charge Renormalization ◽  
Vacuum Polarization Tensor

Scalar Quantum Electrodynamics is investigated in the Heisenberg picture via the Duffin-Kemmer-Petiau gauge theory. On this framework, a perturbative method is used to compute the vacuum polarization tensor and its corresponding induced current for the case of a charged scalar field in the presence of an external electromagnetic field. Charge renormalization is brought into discussion for the interpretation of the results for the vacuum polarization.

Vacuum polarization of generalized quantum electrodynamics in the Heisenberg picture

2020 ◽  
Vol 35 (04) ◽  
pp. 2050012
Author(s):  
David Montenegro
Keyword(s):  
Quantum Electrodynamics ◽  
Vacuum Polarization ◽  
General Structure ◽  
Higher Order ◽  
Polarization Tensor ◽  
Induced Current ◽  
Heisenberg Picture ◽  
Qualitative And Quantitative ◽  
Physical Implication ◽  
Charge Renormalization

In this work, we consider the generalized quantum electrodynamics proposed by Podolsky in Heisenberg picture via Källén methodology. We investigate the effects of higher-order derivatives to understand the qualitative and quantitative aspects of vacuum polarization. In addition, the most general structure of induced current and polarization tensor that emerge naturally by a perturbative scheme “à la” Källén is also obtained. Afterward, we discuss the physical implication of charge renormalization in the perspective of unitary and stable Podolsky theory.

scholarly journals Pulsar Magnetospheres: Classical, Quasi-Classical and Quantum Descriptions

2000 ◽  
Vol 177 ◽  
pp. 457-460
Author(s):  
A. A. da Costa
Keyword(s):  
Kinetic Theory ◽  
Quantum Electrodynamics ◽  
Gamma Ray ◽  
Radiation Mechanisms ◽  
Radiative Processes ◽  
High Energies ◽  
Curvature Radiation ◽  
Pulsar Radiation ◽  
Relativistic Kinetic Theory ◽  
Random Curvature

AbstractThe plasma motion in pulsar magnetospheres is no longer classical, but quasi-classical, following stochastic trajectories, when random curvature radiation of high energetic gamma-ray photons takes place. This implies an extension to the relativistic kinetic theory of plasmas. But with high energies involved other quantum radiative processes become important, in the context of vacuum (quantum) electrodynamics. The consequences for pulsar radiation mechanisms will be outlined.

The form of the divergencies in quantum electrodynamics

1956 ◽  
Vol 234 (1197) ◽  
pp. 296-300 ◽  
Keyword(s):  
Quantum Electrodynamics ◽  
Functional Equations ◽  
Asymptotic Form ◽  
Particle Charge ◽  
High Energies ◽  
Renormalization Constants

The results of Landau and his collaborators on the asymptotic form of the propagators for high energies and the dependence of the renormalization constants on the cut-off are re­-derived, starting from the functional equations of Gell-Mann & Low. It is proved further that, in electrodynamics, the cut-off cannot be made arbitrarily large, without the ‘bare-particle’ charge becoming imaginary.

ON AN AMBIGUOUS INTEGRAL IN QUANTUM ELECTRODYNAMICS

1967 ◽  
Vol 45 (1) ◽  
pp. 1-5
Author(s):  
Robert E. Pugh
Keyword(s):  
Wave Function ◽  
Quantum Electrodynamics ◽  
Vacuum Polarization ◽  
Wave Function Renormalization ◽  
Gauge Invariant ◽  
Photon Field

An integral that appears in several contexts in quantum electrodynamics is evaluated without the usual ambiguity. The result is applied to (1) the contribution of vacuum polarization to the interpolating photon field, (2) wave-function renormalization, and (3) a gauge-independent formulation of quantum electrodynamics. In the first two cases the expected results are obtained, while in the last case the particular formulation is shown to be, in fact, not gauge invariant.

scholarly journals Photon Fission in Intense Laser Fields and in the Coulomb Field of a Nucleus

1979 ◽  
Vol 32 (4) ◽  
pp. 295 ◽  
Author(s):  
JF Lindsey ◽  
HS Perlman ◽  
GJ Troup
Keyword(s):  
Cross Section ◽  
Quantum Electrodynamics ◽  
Vacuum Polarization ◽  
Transition Amplitude ◽  
Coulomb Field ◽  
Fission Cross Section ◽  
Developmental State ◽  
Intense Laser ◽  
Intense Laser Fields ◽  
Laser Technology

A calculation of the photon fission cross section in the Coulomb field of a nucleus reveals that the real part of the transition amplitude is the predominant contributor for photon energies up to 2 MeV. Since it is just this part that is associated with the fourth-order vacuum polarization process, it is suggested, given the present developmental state of laser technology, that coincidence experiments with photon fission might well afford a test of higher order quantum electrodynamics.

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