The supplementary condition in quantum electrodynamics

1961 ◽  
Vol 21 (2) ◽  
pp. 274-293 ◽  
Author(s):  
C. A. Hurst
Keyword(s):  
Quantum Electrodynamics ◽  
Supplementary Condition

Molecular quantum electrodynamics

1971 ◽  
Vol 321 (1547) ◽  
pp. 557-572 ◽  
Keyword(s):  
Electromagnetic Field ◽  
Quantum Electrodynamics ◽  
Unitary Transformation ◽  
Charged Particles ◽  
Gauge Condition ◽  
Binding Energies ◽  
Quantum Mechanical ◽  
Supplementary Condition ◽  
Molecular Systems ◽  
Hamiltonian Theory

A comparison is made of the conventional quantum mechanical hamiltonian for the interaction of molecular systems with the electromagnetic field and the alternative multipole formulation given recently (Atkins & Woolley 1970). The conventional hamiltonian is first derived by using Dirac’s generalized hamiltonian theory in which the Coulomb gauge condition is introduced as a supplementary condition. We analyse further the interpretation of the unitary transformation that connects the two hamiltonians in terms of the arbitrariness of the phase of the wavefunctions of charged particles in the presence of the electromagnetic field, and finally examine the problem of exhibiting explicitly the binding energies of the molecular systems.

Energy, Information, and Superluminal Speed in Quantum Electrodynamics

2020 ◽  
pp. 27-33
Author(s):  
Boris A. Veklenko
Keyword(s):  
Electromagnetic Field ◽  
Perturbation Theory ◽  
Quantum Electrodynamics ◽  
Excited Atom ◽  
Standard Quantum ◽  
Energy Information

Without using the perturbation theory, the article demonstrates a possibility of superluminal information-carrying signals in standard quantum electrodynamics using the example of scattering of quantum electromagnetic field by an excited atom.

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