scholarly journals Simple Atoms, Quantum Electrodynamics, and Fundamental Constants

2003 ◽  
pp. 141-162 ◽  
Author(s):  
Savely G. Karshenboim
Keyword(s):  
Quantum Electrodynamics ◽  
Fundamental Constants

The Fundamental Constants and Quantum Electrodynamics

Physics Today ◽  
1971 ◽  
Vol 24 (5) ◽  
pp. 51-53
Author(s):  
B. N. Taylor ◽  
W. H. Parker ◽  
D. N. Langenberg ◽  
F. L. Wilson
Keyword(s):  
Quantum Electrodynamics ◽  
Fundamental Constants

Quantum electrodynamics and the fundamental constants

1990 ◽  
Vol 33 (1) ◽  
pp. 7-14
Author(s):  
R. N. Faustov
Keyword(s):  
Quantum Electrodynamics ◽  
Fundamental Constants

The Fundamental Constants and Quantum Electrodynamics

1970 ◽  
Vol 21 (8) ◽  
pp. 366-367
Author(s):  
P Vigoureux
Keyword(s):  
Quantum Electrodynamics ◽  
Fundamental Constants

Antihydrogen Physics at ALPHA/CERNThis paper was presented at the International Conference on Precision Physics of Simple Atomic Systems, held at University of Windsor, Windsor, Ontario, Canada on 21–26 July 2008.

2009 ◽  
Vol 87 (7) ◽  
pp. 791-797 ◽  
Author(s):  
C. L. Cesar ◽  
G. B. Andresen ◽  
W. Bertsche ◽  
P. D. Bowe ◽  
C. C. Bray ◽  
...  
Keyword(s):  
High Precision ◽  
Quantum Electrodynamics ◽  
Fundamental Constants ◽  
Cpt Violation ◽  
Cpt Symmetry ◽  
Trapped Atoms ◽  
Fundamental Physics ◽  
Atomic Systems ◽  
Unique System ◽  
Recent Developments

Cold antihydrogen has been produced at CERN (Amoretti et al. (Nature, 419, 456 (2002)), Gabrielse et al. (Phys. Rev. Lett. 89, 213401 (2002))), with the aim of performing a high-precision spectroscopic comparison with hydrogen as a test of the CPT symmetry. Hydrogen, a unique system used for the development of quantum mechanics and quantum electrodynamics, has been continuously used to produce high-precision tests of theories and measurements of fundamental constants and can lead to a very sensitive search for CPT violation. After the initial production of cold antihydrogen atoms by the ATHENA group, the ALPHA Collaboration ( http://alpha.web.cern.ch/ ) has set forth on an experiment to trap and perform high-resolution laser spectroscopy on the 1S-2S transition of both atoms. In this contribution, we will review the motivations, goals, techniques, and recent developments towards this fundamental physics test. We present new discussion on predicted lineshapes for the 1S-2S spectroscopy of trapped atoms in a regime not discussed before.

HOW MANY FUNDAMENTAL CONSTANTS DOES QUANTUM PHYSICS NEED?

2000 ◽  
Vol 15 (06) ◽  
pp. 875-892 ◽  
Author(s):  
J. W. G. WIGNALL
Keyword(s):  
Quantum Electrodynamics ◽  
Quantum Physics ◽  
Inertial Mass ◽  
Lorentz Factor ◽  
Fundamental Constants ◽  
Constant Quantity ◽  
Quantum Phenomena ◽  
De Broglie Wavelength ◽  
Quantum Equations ◽  
Base Units

Of the four familiar constants c, [Formula: see text], [Formula: see text] and ℏ (expressed in SI or other "ordinary" units) used in quantum mechanics and quantum electrodynamics, only three are independent because [Formula: see text], [Formula: see text] and ℏ occur in quantum equations and their predictions only as the ratios [Formula: see text] and [Formula: see text]. If one defines the inertial mass of any particle absolutely and operationally as its rest frame de Broglie frequency, the constant quantity [Formula: see text], where [Formula: see text] is its measured de Broglie wavelength when it has speed v and Lorentz factor γ, then electric charge becomes dimensionless and ℏ disappears from all quantum expressions; classical and quantum equations can then be written in terms of only three fundamental constants — c, the frequency me and the dimensionless e — and involve only two base units, those of length and time. This suggests that quantization rules, whose "scale" is given by ℏ, can also be eliminated from the theoretical framework and that it is therefore possible to construct a single unified theory of classical and quantum phenomena.

scholarly journals Quantum Field Theory with Electric-Magnetic Duality and Spin-Mass Duality But Without Grand Unification and Supersymmetry

2019 ◽  
Author(s):  
Rainer Kühne
Keyword(s):  
Quantum Electrodynamics ◽  
Maxwell Equations ◽  
Torsion Tensor ◽  
Rest Mass ◽  
Fundamental Equation ◽  
Magnetic Monopoles ◽  
Fundamental Constants ◽  
Quantum Field ◽  
Quantum Version ◽  
Cartan Theory

I present a generalization of quantum electrodynamics which includes Dirac magnetic monopoles and the Salam magnetic photon. This quantum electromagnetodynamics has many attractive features. (1) It explains the quantization of electric charge. (2) It describes symmetrized Maxwell equations. (3) It is manifestly covariant. (4) It describes local four-potentials. (5) It avoids the unphysical Dirac string. (6) It predicts a second kind of electromagnetic radiation which can be veri?ed by a tabletop experiment. An e?ect of this radiation may have been observed by August Kundt in 1885. Furthermore I discuss a generalization of General Relativity which includes Cartan's torsion. I discuss the mathematical de?nition, concrete description, and physical meaning of Cartan's torsion. I argue that the electric-magnetic duality of quantum electromagnetodynamics is analogous to the spin-mass duality of Einstein-Cartan theory. A quantum version of this theory requires that the torsion tensor corresponds to a spin-3 boson called tordion which is shown to have a rest mass close to the Planck mass. Moreover I present an empirically satis?ed fundamental equation of uni?ed ?eld theory which includes the fundamental constants of electromagnetism and gravity. I conclude with the remark that the concepts presented here require neither Grand Uni?cation nor supersymmetry.

scholarly journals Precise test of quantum electrodynamics and determination of fundamental constants with HD+ ions

Nature ◽  
2020 ◽  
Vol 581 (7807) ◽  
pp. 152-158 ◽  
Author(s):  
S. Alighanbari ◽  
G. S. Giri ◽  
F. L. Constantin ◽  
V. I. Korobov ◽  
S. Schiller
Keyword(s):  
Quantum Electrodynamics ◽  
Fundamental Constants
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