General connection between random electrodynamics and quantum electrodynamics for free electromagnetic fields and for dipole oscillator systems

1975 ◽  
Vol 11 (4) ◽  
pp. 809-830 ◽  
Author(s):  
Timothy H. Boyer
Keyword(s):  
Electromagnetic Fields ◽  
Quantum Electrodynamics ◽  
Dipole Oscillator ◽  
General Connection

scholarly journals Probability Calculations Within Stochastic Electrodynamics

2021 ◽  
Vol 8 ◽  
Author(s):  
Daniel C. Cole
Keyword(s):  
Electromagnetic Fields ◽  
First Principles ◽  
Quantum Electrodynamics ◽  
Zero Point ◽  
Probability Density Functions ◽  
Integral Approach ◽  
Multiple Points ◽  
Stochastic Electrodynamics ◽  
Dipole Oscillator ◽  
Weighted Paths

Several stochastic situations in stochastic electrodynamics (SED) are analytically calculated from first principles. These situations include probability density functions, as well as correlation functions at multiple points of time and space, for the zero-point (ZP) electromagnetic fields, as well as for ZP plus Planckian (ZPP) electromagnetic fields. More lengthy analytical calculations are indicated, using similar methods, for the simple harmonic electric dipole oscillator bathed in ZP as well as ZPP electromagnetic fields. The method presented here makes an interesting contrast to Feynman’s path integral approach in quantum electrodynamics (QED). The present SED approach directly entails probabilities, while the QED approach involves summing weighted paths for the wave function.

A THEORY OF THE CREATION OF ELECTRIC CHARGE

1945 ◽  
Vol 23a (2) ◽  
pp. 33-38
Author(s):  
W. H. Watson
Keyword(s):  
Electromagnetic Fields ◽  
Electric Charge ◽  
Quantum Electrodynamics ◽  
Field Component ◽  
Rest Mass ◽  
The Creation ◽  
New Interpretation ◽  
Theory Of Fields

The theory is based on equations previously proposed (2) associating with ordinary electromagnetic fields a field which may change the rest-mass of the particles on which it acts. The sources of the new field component [Formula: see text] are places where charge is being created or destroyed. A new interpretation is given to the length e2/mc2, and it is proposed that the e.m. potentials (ϕ,a) be given absolute values in the theory of fields containing electrons. Thus the mass of an electron is determined by the length of the potential four-vector at the place where it is created, and[Formula: see text]The introduction of the N-component into quantum electrodynamics is discussed.

scholarly journals Pair Production in Intense Electromagnetic Fields of Pulsars

1987 ◽  
Vol 125 ◽  
pp. 61-61
Author(s):  
T.Y. Shi
Keyword(s):  
Pair Production ◽  
Electromagnetic Fields ◽  
Quantum Electrodynamics ◽  
High Energy ◽  
Electron Positron

The possible existence of strong electromagnetic fields in pulsars has motivated extensive interest in investigation of various quantum electrodynamics processes. In particular, the process of converting high energy photons into electron-positron pairs is of great significance in pulsar theory.

scholarly journals Macroscopic quantum electrodynamics - Concepts and applications

2008 ◽  
Vol 58 (5) ◽  
Author(s):  
Stefan Scheel ◽  
Stefan Buhmann
Keyword(s):  
Electromagnetic Fields ◽  
Quantum Electrodynamics ◽  
Dispersion Forces ◽  
Macroscopic Quantum ◽  
Atomic Systems ◽  
Mode Expansion ◽  
Field Coupling ◽  
Relaxation Effects ◽  
Atomic Relaxation ◽  
Standard Mode

Macroscopic quantum electrodynamics - Concepts and applicationsIn this article, we review the principles of macroscopic quantum electrodynamics and discuss a variety of applications of this theory to medium-assisted atom-field coupling and dispersion forces. The theory generalises the standard mode expansion of the electromagnetic fields in free space to allow for the presence of absorbing bodies. We show that macroscopic quantum electrodynamics provides the link between isolated atomic systems and magnetoelectric bodies, and serves as an important tool for the understanding of surface-assisted atomic relaxation effects and the intimately connected position-dependent energy shifts which give rise to Casimir—Polder and van der Waals forces.

Dipole oscillator strengths for the alkalilike ions

1992 ◽  
Vol 70 (12) ◽  
pp. 1279-1282 ◽  
Author(s):  
S. S. Liaw
Keyword(s):  
Experimental Data ◽  
Quantum Electrodynamics ◽  
Oscillator Strengths ◽  
Semiempirical Methods ◽  
Nonlocal Term ◽  
Present Calculation ◽  
Dipole Oscillator ◽  
Good Agreement

We calculate the oscillator strengths of some transitions for the alkalilike ions in the Dirac–Fock approximation. The oscillator strengths calculated have included a nonlocal term derived previously by Feldman and Fulton from quantum electrodynamics. The numerical values of the length and velocity forms are shown to be equal. Most results of the present calculation are in good agreement with the available experimental data. Thus the formalism, with no parameters to be adjusted in contrast to the semiempirical methods, offers a simple and effective way to obtain qualitatively satisfactory oscillator strengths for large alkalilike ions.

scholarly journals Avoiding gauge ambiguities in cavity quantum electrodynamics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dominic M. Rouse ◽  
Brendon W. Lovett ◽  
Erik M. Gauger ◽  
Niclas Westerberg
Keyword(s):  
Electric Field ◽  
Strong Coupling ◽  
Electromagnetic Fields ◽  
Quantum Electrodynamics ◽  
Degrees Of Freedom ◽  
Cavity Quantum Electrodynamics ◽  
Strong Coupling Regime ◽  
Energy Eigenstates ◽  
Gauge Choice ◽  
Gauge Ambiguity

AbstractSystems of interacting charges and fields are ubiquitous in physics. Recently, it has been shown that Hamiltonians derived using different gauges can yield different physical results when matter degrees of freedom are truncated to a few low-lying energy eigenstates. This effect is particularly prominent in the ultra-strong coupling regime. Such ambiguities arise because transformations reshuffle the partition between light and matter degrees of freedom and so level truncation is a gauge dependent approximation. To avoid this gauge ambiguity, we redefine the electromagnetic fields in terms of potentials for which the resulting canonical momenta and Hamiltonian are explicitly unchanged by the gauge choice of this theory. Instead the light/matter partition is assigned by the intuitive choice of separating an electric field between displacement and polarisation contributions. This approach is an attractive choice in typical cavity quantum electrodynamics situations.

Bound state quantum electrodynamics with polarization sources

1975 ◽  
Vol 342 (1628) ◽  
pp. 113-129 ◽  
Keyword(s):  
Electromagnetic Fields ◽  
Quantum Electrodynamics ◽  
Relativistic Quantum ◽  
Bound State ◽  
Magnetic Interactions ◽  
Conventional Theory ◽  
Relativistic Quantum Field Theory ◽  
Atomic Systems ◽  
Radiation Theory ◽  
Classical Radiation

A manifestly gauge invariant relativistic quantum field theory of the interaction of atomic systems with electromagnetic fields is shown to be systematically obtained from conventional quantum electrodynamics. The basic ingredient is an exact decomposition of the Dirac sources J μ modified to include the binding, into polarization sources P and M . The transformation of the conventional theory is achieved by means of a generalized Power-Zienau-Woolley transformation. While J μ couple to the potentials A μ , the polarization sources are shown to couple directly to the field intensities E and B . An explicit separation between electric and magnetic interactions is thus obtained which is in close correspondence w'ith the case in the semi-classical radiation theory. The relevance of the transformed theory to problems involving intense electromagnetic fields is pointed out and discussed.

Effect of pulsed electromagnetic fields on maturation of regenerate bone in a rabbit limb lengthening model

2005 ◽  
Vol 24 (1) ◽  
pp. 2-10 ◽  
Author(s):  
Kenneth F. Taylor ◽  
Nozumu Inoue ◽  
Bahman Rafiee ◽  
John E. Tis ◽  
Kathleen A. McHale ◽  
...  
Keyword(s):  
Electromagnetic Fields ◽  
Limb Lengthening ◽  
Pulsed Electromagnetic Fields ◽  
Pulsed Electromagnetic
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