Asymptotic behavior of the effective Lagrangian of quantum electrodynamics for particles with anomalous moments

1987 ◽  
Vol 30 (9) ◽  
pp. 793-795
Author(s):  
P. M. Lavrov
Keyword(s):  
Asymptotic Behavior ◽  
Quantum Electrodynamics ◽  
Effective Lagrangian

Infrared asymptotic behavior of gauge-invariant propagator in quantum electrodynamics

1987 ◽  
Vol 71 (1) ◽  
pp. 376-385 ◽  
Author(s):  
N. B. Skachkov ◽  
I. L. Solovtsov ◽  
O. Yu. Shevchenko
Keyword(s):  
Asymptotic Behavior ◽  
Quantum Electrodynamics ◽  
Gauge Invariant

scholarly journals THE ANAPOLE MOMENT IN SCALAR QUANTUM ELECTRODYNAMICS

2010 ◽  
Vol 25 (37) ◽  
pp. 3145-3150 ◽  
Author(s):  
A. BASHIR ◽  
Y. CONCHA-SÁNCHEZ ◽  
M. E. TEJEDA-YEOMANS ◽  
J. J. TOSCANO
Keyword(s):  
Quantum Electrodynamics ◽  
Scalar Particle ◽  
Charged Scalar ◽  
Current Conservation ◽  
Anapole Moment ◽  
Effective Lagrangian ◽  
Physical Observable ◽  
Scalar Quantum ◽  
Charged Scalar Particle ◽  
Shell Particles

The anapole moment of a massless charged scalar particle is studied in a model-independent fashion, using the effective Lagrangian technique, as well as radiatively within the context of scalar quantum electrodynamics (SQED). It is shown that this gauge structure is characterized by a non-renormalizable interaction, which is radiatively generated at one-loop. It is found that the resulting anapole moment for off-shell particles, though free of ultraviolet divergences, is gauge dependent and thus it is not a physical observable. We also study some of its kinematical limits. In particular, it is shown that its value comes out to be zero when the photon is on-shell and the momenta squared of the incoming and outgoing scalars are equal. It is a stronger statement than it being zero for all particles being on-shell which is required by the current conservation.

TEST OF QUANTUM ELECTRODYNAMICS USING ULTRA-HIGH SENSITIVE INTERFEROMETERS

1991 ◽  
Vol 06 (40) ◽  
pp. 3671-3678 ◽  
Author(s):  
WEI-TOU NI ◽  
KIMIO TSUBONO ◽  
NORIKATSU MIO ◽  
KAZUMICHI NARIHARA ◽  
SHEN-CHE CHEN ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Quantum Electrodynamics ◽  
Effective Index ◽  
Magnetic Effect ◽  
Modulation Scheme ◽  
Strong Fields ◽  
Wave Detection ◽  
Effective Lagrangian ◽  
Double Modulation

For strong fields, quantum electrodynamics tells us that the vacuum is refractive. This can be described by Euler-Heisenberg effective Lagrangian and for B ~ 12 T , the effective index deviates from one of the order of 10-21. Schemes to measure this effect are proposed using ultra-high sensitive interferometers of the type developed for gravity-wave detection. A double modulation scheme is promising in measuring the effect to 1%. For E ~ 5 × 107 V/m and B ~ 12 T , the mixed electric-magnetic effect is also within the reach of detectability.

Effective Lagrangian for scale-invariant quantum electrodynamics

1992 ◽  
Vol 45 (12) ◽  
pp. 4672-4680 ◽  
Author(s):  
William A. Bardeen ◽  
Sherwin T. Love
Keyword(s):  
Quantum Electrodynamics ◽  
Scale Invariant ◽  
Effective Lagrangian ◽  
Invariant Quantum

VACUUM FLUCTUATION CORRECTIONS TO MAXWELL ELECTRODYNAMICS REVISITED

2013 ◽  
Vol 28 (19) ◽  
pp. 1350095
Author(s):  
J. L. TOMAZELLI ◽  
D. E. ZANELLATO
Keyword(s):  
Quantum Electrodynamics ◽  
Zero Point ◽  
External Electromagnetic Field ◽  
Dirac Field ◽  
Fermion Field ◽  
Point Energy ◽  
Effective Lagrangian ◽  
Maxwell Electrodynamics ◽  
Scalar Quantum ◽  
Lagrangian Densities

The influence of an external electromagnetic field on the vacuum structure of a quantized Dirac field is investigated by considering the quantum corrections to classical Maxwell's Lagrangian density induced by fluctuations of the nonperturbative vacuum. Effective Lagrangian densities for Maxwell's theory in (3 + 1) and (2 + 1) dimensions are derived from the vacuum zero-point energy of the fermion field in the context of a consistent Pauli–Villars–Rayski subtraction scheme, recovering Euler–Kockel–Heisenberg and Maxwell–Chern–Simons effective theories. Effective Scalar Quantum Electrodynamics is also discussed.

CREATION OF A WORMHOLE DUE TO NONLINEAR ELECTRODYNAMICS

2002 ◽  
Vol 17 (20) ◽  
pp. 1305-1314 ◽  
Author(s):  
CARLA FONSECA-BARBATTI ◽  
M. NOVELLO ◽  
J. M. SALIM ◽  
REGINA C. ARCURI
Keyword(s):  
Magnetic Field ◽  
Quantum Electrodynamics ◽  
Nonlinear Electrodynamics ◽  
Einstein Field Equations ◽  
Field Equations ◽  
New Class ◽  
Effective Lagrangian ◽  
The One

We obtain a new class of solutions for the Einstein field equations which describe wormholes by using the one-loop effective Lagrangian of quantum electrodynamics. We also show that the derived wormholes can be maintained only by means of a magnetic field.

ON THE ASYMPTOTIC BEHAVIOR OF THE PHOTON PROPAGATOR IN QUANTUM ELECTRODYNAMICS

2002 ◽  
Vol 17 (02) ◽  
pp. 279-296
Author(s):  
ANDRZEJ R. ALTENBERGER ◽  
JOHN S. DAHLER
Keyword(s):  
Functional Equation ◽  
Asymptotic Behavior ◽  
Quantum Electrodynamics ◽  
Anomalous Dimension ◽  
Group Method ◽  
Photon Propagator ◽  
Renormalization Group Method ◽  
Effective Coupling ◽  
Transverse Photon ◽  
Self Similar

A new renormalization group method is used to calculate the photon propagator in the high four-momentum regime. The assumption that this propagator is a self-similar object leads directly to a functional equation of evolution involving an invariant charge (effective coupling function) which, in turn, is a functional of the propagator. Numerical results produced by this theory depend on a single unknown, namely, the scale in which the four-momentum k is measured. Calculations are presented for several values of this scale. From these it is concluded that the transverse photon propagator behaves asymptotically as D⊥(k)~k2(λ-1) with the value of λ (the anomalous dimension) falling in the range (0.12, 1).

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