Measurement of the 2S 1/2–2P 3/2 level splitting in muonic helium: A test of quantum electrodynamics predictions on electronic vacuum polarization

1976 ◽  
Vol 34 (4) ◽  
pp. 493-514 ◽  
Author(s):  
G. Carboni ◽  
U. Gastaldi ◽  
G. Neri ◽  
O. Pitzurra ◽  
E. Polacco ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Vacuum Polarization ◽  
Level Splitting

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.

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.

scholarly journals The lack of vacuum polarization in quantum electrodynamics with spinors in fermion equations

2021 ◽  
Vol 36 (24) ◽  
pp. 2150173
Author(s):  
V. P. Neznamov
Keyword(s):  
Quantum Electrodynamics ◽  
Vacuum Polarization ◽  
The Future ◽  
Dirac Sea ◽  
Physical Consequences

In this paper, the versions of quantum electrodynamics (QED) with spinors in fermion equations are briefly examined. In the new variants of the theory, the concept of vacuum polarization is unnecessary. The new content of fermion vacuum (without the Dirac sea) in the examined versions of QED leads to new physical consequences, part of which can be tested experimentally in the future.

scholarly journals Quantum Electrodynamics vacuum polarization solver

2021 ◽  
Author(s):  
Thomas E Grismayer ◽  
Rui Torres ◽  
Pedro Carneiro ◽  
Fábio Cruz ◽  
Ricardo A Fonseca ◽  
...  
Keyword(s):  
Quantum Electrodynamics ◽  
Vacuum Polarization
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