The nonlinear effects of quantum electrodynamics at high energies

1991 ◽  
Vol 51 (3) ◽  
pp. 403-412
Author(s):  
Y. Sakurayama ◽  
H. Salecker
Keyword(s):  
Quantum Electrodynamics ◽  
Nonlinear Effects ◽  
High Energies

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.

Nonlinear effects in quantum electrodynamics

1971 ◽  
Vol 2 (3) ◽  
pp. 733-787 ◽  
Author(s):  
V. Costantini ◽  
B. De Tollis ◽  
G. Pistoni
Keyword(s):  
Quantum Electrodynamics ◽  
Nonlinear Effects

Multiple bremsstrahlung in gauge theories at high energies (I). General formalism for quantum electrodynamics

1982 ◽  
Vol 206 (1) ◽  
pp. 53-60 ◽  
Author(s):  
P. De Causmaecker ◽  
R. Gastmans ◽  
W. Troost ◽  
Tai Tsun Wu
Keyword(s):  
Quantum Electrodynamics ◽  
Gauge Theories ◽  
High Energies

scholarly journals Investigation of nonlinear effects in Josephson parametric oscillators used in circuit quantum electrodynamics

2013 ◽  
Vol 15 (10) ◽  
pp. 105002 ◽  
Author(s):  
Philip Krantz ◽  
Yarema Reshitnyk ◽  
Waltraut Wustmann ◽  
Jonas Bylander ◽  
Simon Gustavsson ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Nonlinear Effects ◽  
Circuit Quantum Electrodynamics ◽  
Parametric Oscillators

scholarly journals Pulsar Geometrodynamics: Relativistic Radiative Plasma Theory and its Associated Quantum Phenomena

2000 ◽  
Vol 195 ◽  
pp. 385-386
Author(s):  
A. A. da Costa
Keyword(s):  
Kinetic Theory ◽  
Quantum Electrodynamics ◽  
Gamma Ray ◽  
Radiative Processes ◽  
High Energies ◽  
Plasma Motion ◽  
Curvature Radiation ◽  
Plasma Theory ◽  
Quantum Phenomena

Plasma motion in pulsar magnetospheres is quasi-classical due to curvature radiation of highly energetic gamma-ray photons, implying an extension to the kinetic theory of plasmas. But with high energies involved, other quantum radiative processes become important in the context of vacuum (quantum) electrodynamics.

scholarly journals Beta functions in the quantum field theory

2022 ◽  
Vol 70 (1) ◽  
pp. 157-168
Author(s):  
Nikola Fabiano
Keyword(s):  
Field Theory ◽  
Quantum Electrodynamics ◽  
Beta Function ◽  
Coupling Constants ◽  
Field Theories ◽  
Asymptotic Freedom ◽  
Quantum Field Theories ◽  
Quantum Field ◽  
Coupling Constant ◽  
High Energies

Introduction/purpose: The running of the coupling constant in various Quantum Field Theories and a possible behaviour of the beta function are illustrated. Methods: The Callan-Symanzik equation is used for the study of the beta function evolution. Results: Different behaviours of the coupling constant for high energies are observed for different theories. The phenomenon of asymptotic freedom is of particular interest. Conclusions: Quantum Electrodynamics (QED) and Quantum Chromodinamics (QCD) coupling constants have completely different behaviours in the regime of high energies. While the first one diverges for finite energies, the latter one tends to zero as energy increases. This QCD phenomenon is called asymptotic freedom.

Sign in / Sign up

Export Citation Format

Share Document