This category needs an editor. We encourage you to help if you are qualified.
Volunteer, or read more about what this involves.
Related categories
Siblings:
53 found
Search inside:
(import / add options)   Sort by:
1 — 50 / 53
  1. I. Açikgöz & N. Ünal (1998). Vacuum Polarization in Self-Field Quantum Electrodynamics. Foundations of Physics 28 (5):815-828.
    We have evaluated analytically the vacuum polarization in a Coulomb field using the relativistic Dirac-Coulomb wave functions by a new method. The result is made finite by an appropriate choice of contour integrations and gives the standard result in the lowest order of iteration. We used the formalism of self-field quantum electrodynamics in the evaluation of the vacuum polarization which needs neither field quantization nor renormalization. There are no infrared or ultraviolet divergences.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  2. Y. Aharonov & G. Carmi (1973). Quantum Aspects of the Equivalence Principle. Foundations of Physics 3 (4):493-498.
    Two thought experiments are discussed which suggest, first, a geometric interpretation of the concept of a (say, vector) potential (i.e., as a kinematic quantity associated with a transformation between moving frames of reference suitably related to the problem) and, second, that, in a quantum treatment one should extend the notion of the equivalence principle to include not only the equivalence of inertial forces with suitable “real” forces, but also the equivalence of potentials of such inertial forces and the potentials of (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  3. Edgardo T. Garcia Alvarez & Fabian H. Gaioli (1998). Feynman's Proper Time Approach to QED. Foundations of Physics 28 (10):1529-1538.
    The genesis of Feynman's original approach to QED is reviewed. The main ideas of his original presentation at the Pocono Conference are discussed and compared with the ones involved in his action-at-distance formulation of classical electrodynamics. The role of the de Sitter group in Feynman's visualization of space-time processes is emphasized.
    Remove from this list | Direct download (5 more)  
     
    My bibliography  
     
    Export citation  
  4. I. Antoniou, E. Karpov & G. Pronko (2001). Non-Locality in Electrodynamics. Foundations of Physics 31 (11):1641-1655.
    We investigate the applicability of Hegerfeldts arguments on Quantum nonlocality in Quantum Electrodynamics following the work of Prigogine, Pronko, Petrosky, Ordonez and Karpov. We demonstrate the appearance of nonlocal effects at the level of quantum states. We show, however that the expectation values of some observables spread causally. Therefore the measurement of the nonlocality is questionable. We investigate an approach to classical measurement and conclude that the classical measurement cannot detect the “acausal” effects of the non-locality.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  5. A. Arensburg & L. P. Horwitz (1992). A First-Order Equation for Spin in a Manifestly Relativistically Covariant Quantum Theory. Foundations of Physics 22 (8):1025-1039.
    Relativistic quantum mechanics has been formulated as a theory of the evolution ofevents in spacetime; the wave functions are square-integrable functions on the four-dimensional spacetime, parametrized by a universal invariant world time τ. The representation of states with spin is induced with a little group that is the subgroup of O(3, 1) leaving invariant a timelike vector nμ; a positive definite invariant scalar product, for which matrix elements of tensor operators are covariant, emerges from this construction. In a previous study (...)
    Remove from this list | Direct download (2 more)  
     
    My bibliography  
     
    Export citation  
  6. R. Arshansky, L. P. Horwitz & Y. Lavie (1983). Particles Vs. Events: The Concatenated Structure of World Lines in Relativistic Quantum Mechanics. [REVIEW] Foundations of Physics 13 (12):1167-1194.
    The dynamical equations of relativistic quantum mechanics prescribe the motion of wave packets for sets of events which trace out the world lines of the interacting particles. Electromagnetic theory suggests thatparticle world line densities be constructed from concatenation of event wave packets. These sequences are realized in terms of conserved probability currents. We show that these conserved currents provide a consistent particle and antiparticle interpretation for the asymptotic states in scattering processes. The relation between current conservation and unitarity is used (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  7. D. Atkinson, Strong Quantum Electrodynamics.
    quantum electrodynamics. In quasilinear approximation, the integral equation is solved by Mellin transformation, followed by the calculation of the Muskhelishvili index of the resultant singular integral operator.
    Remove from this list |
    Translate to English
    |
     
    My bibliography  
     
    Export citation  
  8. David Atkinson, Quantum Mechanics and Retrocausality.
    The classical electrodynamics of point charges can be made finite by the introduction of effects that temporally precede their causes. The idea of retrocausality is also inherent in the Feynman propagators of quantum electrodynamics. The notion allows a new understanding of the violation of the Bell inequalities, and of the world view revealed by quantum mechanics. Published in The Universe, Visions and Perspectives, edited by N. Dadhich and A. Kembhavi, Kluwer Academic Publishers, 2000, pages 35-50.
    Remove from this list |
     
    My bibliography  
     
    Export citation  
  9. David Atkinson (2006). Does Quantum Electrodynamics Have an Arrow of Time?☆. Studies in History and Philosophy of Science Part B 37 (3):528-541.
    Quantum electrodynamics is a time-symmetric theory that is part of the electroweak interaction, which is invariant under a generalized form of this symmetry, the PCT transformation. The thesis is defended that the arrow of time in electrodynamics is a consequence of the assumption of an initial state of high order, together with the quantum version of the equiprobability postulate.
    Remove from this list | Direct download (5 more)  
     
    My bibliography  
     
    Export citation  
  10. Mario Bacelar Valente (2011). The Relation Between Classical and Quantum Electrodynamics. Theoria 26 (70):51-68.
    In this article it is presented the idea that quantum electrodynamics has to be seen as a theoretical upgrade of classical electrodynamics and the theory of relativity, that permits an extension of classical theory in the description of phenomena, that while being clearly related to the conceptual framework of the classical theory – the description of matter, radiation, and their interaction – cannot be properly addressed from the classical theory. In this way quantum electrodynamics would not be a fundamental theory, (...)
    Remove from this list | Direct download (2 more)  
     
    My bibliography  
     
    Export citation  
  11. T. Barakat & H. A. Alhendi (2013). Generalized Dirac Equation with Induced Energy-Dependent Potential Via Simple Similarity Transformation and Asymptotic Iteration Methods. Foundations of Physics 43 (10):1171-1181.
    This study shows how precise simple analytical solutions for the generalized Dirac equation with repulsive vector and attractive energy-dependent Lorentz scalar potentials, position-dependent mass potential, and a tensor interaction term can be obtained within the framework of both similarity transformation and the asymptotic iteration methods. These methods yield a significant improvement over existing approaches and provide more plausible and applicable ways in explaining the pseudospin symmetry’s breaking mechanism in nuclei.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  12. A. O. Barut (1987). Irreversibility, Organization, and Self-Organization in Quantum Electrodynamics. Foundations of Physics 17 (6):549-559.
    QED is a fundamental microscopic theory satisfying all the conservation laws and discrete symmetries C, P, T. Yet, dissipative phenomena, organization, and self-organization occur even at this basic microscopic two-body level. How these processes come about and how they are described in QED is discussed. A possible new phase of QED due to self-energy effects leading to self-organization is predicted.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  13. A. O. Barut & J. Kraus (1983). Nonperturbative Quantum Electrodynamics: The Lamb Shift. [REVIEW] Foundations of Physics 13 (2):189-194.
    The nonlinear integro-differential equation, obtained from the coupled Maxwell-Dirac equations by eliminating the potential Aμ, is solved by iteration rather than perturbation. The energy shift is complex, the imaginary part giving the spontaneous emission. Both self-energy and vacuum polarization terms are obtained. All results, including renormalization terms, are finite.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  14. A. O. Barut & S. Malin (1975). Electrodynamics in Terms of Functions Over the groupSU(2). I. The Equation of the Vector Potential. Foundations of Physics 5 (3):375-386.
    This is the first in a series of papers in which a method of harmonic analysis in terms of functions over the groupSU(2) is applied to the description of interaction between matter and the electromagnetic field. Carmeli'sSU(2) formulation of Maxwell's equations is extended to anSU(2) formulation of the equations for the electromagnetic vector potential. The four functions which describe the vector potential are expanded in a generalized Fourier series [SU(2) harmonic analysis] and the equations for the coefficients are derived. These (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  15. A. O. Barut & N. Ünal (1993). On Poisson Brackets and Symplectic Structures for the Classical and Quantum Zitterbewegung. Foundations of Physics 23 (11):1423-1429.
    The symplectic structures (brackets, Hamilton's equations, and Lagrange's equations) for the Dirac electron and its classical model have exactly the same form. We give explicitly the Poisson brackets in the dynamical variables (x μ,p μ,v μ,S μv). The only difference is in the normalization of the Dirac velocities γμγμ=4 which has significant consequences.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  16. W. G. Bauer & H. Salecker (1983). Muonic Atoms Testing the Electron Propagator of Quantum Electrodynamics and the Higgs Boson Contribution. Foundations of Physics 13 (1):115-132.
    In this work we consider the energy states of muonic atoms which are predominantly influenced by vacuum polarization. This fact is used for testing the electron propagator of QED with the modification $S(p) = (\not p - me)^{ - 1} + f(\not p - M)^{ - 1}$ . The data of some well analyzed transitions in muonic He, Si, Ba, and Pb yield the limit M>29 MeV for f=1.Similarly the presence of a Higgs boson would cause a shift of the (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  17. B. Baumgartner (1994). Postulates for Time Evolution in Quantum Mechanics. Foundations of Physics 24 (6):855-872.
    A detailed list of postulates is formulated in an algebraic setting. These postulates are sufficient to entail the standard time evolution governed by the Schrödinger or Dirac equation. They are also necessary in a strong sense: Dropping any one of the postulates allows for other types of time evolution, as is demonstrated with examples. Some philosophical remarks hint on possible further investigations.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  18. Sarah B. M. Bell, John P. Cullerne & Bernard M. Diaz (2004). QED Derived From the Two-Body Interaction. Foundations of Physics 34 (2):297-333.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  19. Sarah B. M. Bell, John P. Cullerne & Bernard M. Diaz (2000). Classical Behavior of the Dirac Bispinor. Foundations of Physics 30 (1):35-57.
    It is usually supposed that the Dirac and radiation equations predict that the phase of a fermion will rotate through half the angle through which the fermion is rotated, which means, via the measured dynamical and geometrical phase factors, that the fermion must have a half-integral spin. We demonstrate that this is not the case and that the identical relativistic quantum mechanics can also be derived with the phase of the fermion rotating through the same angle as does the fermion (...)
    Remove from this list | Direct download (5 more)  
     
    My bibliography  
     
    Export citation  
  20. Joseph Berkovitz (2002). On Causal Loops in the Quantum Realm. In. In T. Placek & J. Butterfield (eds.), Non-Locality and Modality. Kluwer. 235--257.
  21. M. Berrondo & J. F. Van Huele (1993). The Pole Expansion in Normalized QED. Foundations of Physics 23 (5):711-719.
    We present a pole expansion for the propagators in the framework of normalized quantum electrodynamics and compare it with the more canonical results from S-matrix theory.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  22. Leon Bess (1981). Quantum Radiation Theory in a Diffusion Model Version. Foundations of Physics 11 (11-12):949-966.
    Using the diffusion model associated by the author with the wave equations, a part of current quantum radiation theory is reformulated so that the characteristic divergences in the associated calculations no longer arise. The reformulation does this by stipulating, on purely physical grounds, that a transition involving a “virtual” quantum must include a high frequency “cutoff” factor in its interaction Hamiltonian. For a transition involving a “real” quantum, the stipulation is that the “cutoff” factor is not to be included.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  23. Leon Bess (1979). A Diffusion Model for the Dirac Equation. Foundations of Physics 9 (1-2):27-54.
    In previous work the author was able to derive the Schrödinger equation by an analytical approach built around a physical model that featured a special diffusion process in an ensemble of particles. In the present work, this approach is extended to include the derivation of the Dirac equation. To do this, the physical model has to be modified to make provision for intrinsic electric and magnetic dipoles to be associated with each ensemble particle.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  24. L. C. Biedenharn (1983). The “Sommerfeld Puzzle” Revisited and Resolved. Foundations of Physics 13 (1):13-34.
    The exact agreement between the Sommerfeld and Dirac results for the energy levels of the relativistic hydrogen atom (the “Sommerfeld Puzzle”) is analyzed and explained.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  25. Ulrich Bleyer (1993). Energy Levels of the Hydrogen Atom Due to a Generalized Dirac Equation. Foundations of Physics 23 (7):1025-1048.
    The consequences of a generalized Dirac equation are discussed for the energy levels of the hydrogen atom. Apart from the usual generalizations of the Dirac equation by adding new interaction terms, we generalize the anticommutation rule of the Dirac matrices, which leads to spin-dependent propagation properties. Such a theory can be looked at as a model theory for testing Lorentz invariance or as an outcome of pregeometric dynamical induction schemes for space-time structure.For special examples of generalized Dirac matrices including perturbation (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  26. L. Boi (2011). The Quantum Vacuum: A Scientific and Philosophical Concept, From Electrodynamics to String Theory and the Geometry of the Microscopic World. Johns Hopkins University Press.
    Acclaimed mathematical physicist and natural philosopher Luciano Boi expounds the quantum vacuum, exploring the meaning of nothingness and its relationship with ...
    Remove from this list | Direct download  
     
    My bibliography  
     
    Export citation  
  27. Stephen Breen & Peter D. Skiff (1977). Identical Motion in Relativistic Quantum and Classical Mechanics. Foundations of Physics 7 (7-8):589-596.
    The Klein-Gordon equation for the stationary state of a charged particle in a spherically symmetric scalar field is partitioned into a continuity equation and an equation similar to the Hamilton-Jacobi equation. There exists a class of potentials for which the Hamilton-Jacobi equation is exactly obtained and examples of these potentials are given. The partitionAnsatz is then applied to the Dirac equation, where an exact partition into a continuity equation and a Hamilton-Jacobi equation is obtained.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  28. Louis de Broglie (1974). Strong Processes and Transient States. Foundations of Physics 4 (3):321-333.
    Certain difficulties raised by Einstein and Schrödinger in connection with the quantum theory of radiation are discussed and resolved in terms of the author's theory of the double solution.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  29. L. De la Peña & A. M. Cetto (2001). Quantum Theory and Linear Stochastic Electrodynamics. Foundations of Physics 31 (12):1703-1731.
    We discuss the main results of Linear Stochastic Electrodynamics, starting from a reformulation of its basic assumptions. This theory shares with Stochastic Electrodynamics the core assumption that quantization comes about from the permanent interaction between matter and the vacuum radiation field, but it departs from it when it comes to considering the effect that this interaction has on the statistical properties of the nearby field. In the transition to the quantum regime, correlations between field modes of well-defined characteristic frequencies arise, (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  30. L. Diósi (1990). Landau's Density Matrix in Quantum Electrodynamics. Foundations of Physics 20 (1):63-70.
    This paper is devoted to Landau's concept of the problem of damping in quantum mechanics. It shows that Landau's density matrix formalism should survive in the context of modern quantum electrodynamics. The correct generalized master equation has been derived for the reduced dynamics of the charges. The recent relativistic theory of spontaneous emission becomes reproducible.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  31. Jonathan P. Dowling (1993). Spontaneous Emission in Cavities: How Much More Classical Can You Get? [REVIEW] Foundations of Physics 23 (6):895-905.
    Cavity-induced changes in atomic spontaneous emission rates are often interpreted in terms of quantum electrodynamical zero-point field fluctuations. A completely classical method of computing this effect in terms of the unquantized normal mode structure of the cavity is presented here. Upon applying the result to a classical dipole radiating between parallel mirrors, we obtain the same cavity correction as that for atomic spontaneous emission in such a cavity. The theory is then compared with a recent experiment in the radio-frequency domain.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  32. Giampiero Esposito (2008). Comment and Addendum to 'On the Occurrence of Mass in Field Theory'. Foundations of Physics 38 (1):96-98.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  33. Giampiero Esposito (2002). On the Occurrence of Mass in Field Theory. Foundations of Physics 32 (9):1459-1483.
    This paper proves that it is possible to build a Lagrangian for quantum electrodynamics which makes it explicit that the photon mass is eventually set to zero in the physical part on observational ground. Gauge independence is achieved upon considering the joint effect of gauge-averaging term and ghost fields. It remains possible to obtain a counterterm Lagrangian where the only non-gauge-invariant term is proportional to the squared divergence of the potential, while the photon propagator in momentum space falls off like (...)
    Remove from this list | Direct download (5 more)  
     
    My bibliography  
     
    Export citation  
  34. M. W. Evans (1995). The B(3) Field: Its Role in the Rayleigh-Jeans Law, Planck Law, and Einstein Coefficients. [REVIEW] Foundations of Physics 25 (2):383-389.
    The role of the novel longitudinal vacuum fieldB (3)is discussed in relation to fundamental radiation laws: the Rayleigh-Jeans law, the Planck law, and the Einstein coefficients. The circular index (3) ofB (3)causes electromagnetic energy density to be redistributed from the other indices (1) and (2) of the circular basis, but the presence ofB (3)in the vacuum does not change the value of the Planck constant h. TheB (3)field does not affect, furthermore, the understanding of quantized radiation absorption first proposed by (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  35. A. J. Faria, H. M. França, G. G. Gomes & R. C. Sponchiado (2007). The Vacuum Electromagnetic Fields and the Schrödinger Equation. Foundations of Physics 37 (8):1296-1305.
    We consider the simple case of a nonrelativistic charged harmonic oscillator in one dimension, to investigate how to take into account the radiation reaction and vacuum fluctuation forces within the Schrödinger equation. The effects of both zero-point and thermal classical electromagnetic vacuum fields, characteristic of stochastic electrodynamics, are separately considered. Our study confirms that the zero-point electromagnetic fluctuations are dynamically related to the momentum operator p=−i ℏ ∂/∂ x used in the Schrödinger equation.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  36. H. M. FranÇa, A. Maia Jr & C. P. Malta (1996). Maxwell Electromagnetic Theory, Planck's Radiation Law, and Bose—Einstein Statistics. Foundations of Physics 26 (8):1055-1068.
    We give an example in which it is possible to understand quantum statistics using classical concepts. This is done by studying the interaction of chargedmatter oscillators with the thermal and zeropoint electromagnetic fields characteristic of quantum electrodynamics and classical stochastic electrodynamics. Planck's formula for the spectral distribution and the elements of energy hw are interpreted without resorting to discontinuities. We also show the aspects in which our model calculation complement other derivations of blackbody radiation spectrum without quantum assumptions.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  37. O. W. Greenberg (2000). Study of a Model of Quantum Electrodynamics. Foundations of Physics 30 (3):383-391.
    This paper studies the model of the quantum electrodynamics (QED) of a single nonrelativistic electron due to W. Pauli and M. Fierz and studied further by P. Blanchard. This model exhibits infrared divergence in a very simple context. The infrared divergence is associated with the inequivalence of the Hilbert spaces associated with the free Hamiltonian and with the complete Hamiltonian. Infrared divergences that are visible in the perturbative description disappear in the space of the clothed electrons. In this model when (...)
    Remove from this list | Direct download (5 more)  
     
    My bibliography  
     
    Export citation  
  38. William M. Honig (1976). Gödel Axiom Mappings in Special Relativity and Quantum-Electromagnetic Theory. Foundations of Physics 6 (1):37-57.
    Exponential mappings into an imaginary space or number field for the axioms of a theory, which are in the form of propositional constants and variables, make possible: (a) an understanding of the meaning and differences between the Lorentz transformation constants, such that their product is still equal to one, but the axioms at each end of the transformations are logically inverse and separately consistent; (b) an interpretation of the psi function phase factor which is part of the axiomE=hf; (c) the (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  39. K. Kraus (1983). Aspects of the Infrared Problem in Quantum Electrodynamics. Foundations of Physics 13 (7):701-713.
    Scattering states in quantum electrodynamics can not be represented in Fock space (i.e., as states with finitely many incoming and outgoing free photons), since most collisions involve the emission of infinitely many soft photons. At present, there exist two alternative proposals for an appropriately modified structure of the asymptotic state space of quantum electrodynamics. According to the “infraparticle” proposal, each charged particle would be accompanied by an appropriate cloud of infinitely many soft photons, whereas according to the “infravacuum” proposal these (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  40. M. C. Land (1998). Pre-Maxwell Quantum Electrodynamics. Foundations of Physics 28 (9):1499-1506.
    In the framework of off-shell quantum electrodynamics—the quantum field theory of a covariant symplectic mechanics, in which events evolve according to a Poincaré-invariant parameter τ—we study the low-energy scattering of identical scalar particles. It is shown that exchange of mass is permitted in the formalism, and we calculate scattering cross-sections for this case. In these cross-sections, the usual forward pole of the standard scalar QED splits into two poles and a zero, slightly offset from the forward direction. As mass exchange (...)
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  41. Martin Land (2003). Higher-Order Kinetic Term for Controlling Photon Mass in Off-Shell Electrodynamics. Foundations of Physics 33 (8):1157-1175.
    In relativistic classical and quantum mechanics with Poincaré-invariant parameter, particle worldlines are traced out by the evolution of spacetime events. The formulation of a covariant canonical framework for the evolving events leads to a dynamical theory in which mass conservation is demoted from a priori constraint to the status of conserved Noether current for a certain class of interactions. In pre-Maxwell electrodynamics—the local gauge theory associated with this framework —events induce five local off-shell fields, which mediate interactions between instantaneous events, (...)
    Remove from this list | Direct download (5 more)  
     
    My bibliography  
     
    Export citation  
  42. H. Margenau (1954). Causality in Quantum Electrodynamics. Diogenes 2 (6):74-84.
    Remove from this list | Direct download (5 more)  
     
    My bibliography  
     
    Export citation  
  43. Eduard Prugovečki (1994). On Foundational and Geometric Critical Aspects of Quantum Electrodynamics. Foundations of Physics 24 (3):335-362.
    The foundational difficulties encountered by the conventional formulation of quantum electrodynamics, and the criticism by Dirac, Schwinger, Rohrlich, and others, aimed at some of the physical and mathematical premises underlying that formulation, are reviewed and discussed. The basic failings of the conventional methods of quantization of the electromagnetic field are pointed out, especially with regard to the issue of local (anti)commutativity of quantum fields as an embodiment of relativistic microcausality. A brief description is given of a recently advanced new type (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  44. K. Ringhofer & H. Salecker (1980). What Can Be Tested in Quantum Electrodynamics? Foundations of Physics 10 (3-4):185-196.
    In this paper we examine the theoretical foundations underlying the testing of quantum electrodynamics. We show that for the photon propagator (together with the contiguous vertices) it is not necessary to introduce ad hoc modifications in sufficiently accurate scattering experiments. Energy, momentum transfer, and accuracy determine the tested length in a model-independent way. The situation is quite different with the electron propagator. If gauge invariance is taken for granted, the electron propagator cannot be tested with processes where diagrams with open (...)
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  45. Yousef I. Salamin (1993). Self-Energy Quantum Electrodynamics: Multipole Radiation. [REVIEW] Foundations of Physics 23 (5):841-849.
    Within the context of Barut's self-field approach to quantum electrodynamics, we show that the exact relativistic expression for the Einstein A-coefficient of atomic spontaneous emission reduces, in the long wavelength approximation, to a form containing electric- and magnetic-like multipole contributions related to the transition charge and current distributions of the relativistic electron. A number of interesting features of the expressions involved are discussed, and their generalization to interacting composite systems is also pointed out.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  46. Yousef I. Salamin (1993). Bremsstrahlung in Self-Field QED. Foundations of Physics 23 (6):907-912.
    We present a fully relativistic formulation of the theory of electron-nucleus Bremsstrahlung, within the context of self-field QED, as advanced recently by Barut and his co-workers. The Bremsstrahlung emission cross-section, reported here, is also shown to reduce to the standard correct nonrelativistic limit, in the dipole approximation.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  47. Donald Salisbury (2009). Léon Rosenfeld and the Challenge of the Vanishing Momentum in Quantum Electrodynamics. Studies in History and Philosophy of Science Part B 40 (4):363-373.
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
  48. S. Schweber (1995). Early Quantum Electrodynamics. Studies in History and Philosophy of Science Part B 26 (2):201-211.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  49. M. Shirokov (1981). Fermi-Ferretti Problem and Signal Velocity. Foundations of Physics 11 (1-2):21-36.
    We consider the quantum electrodynamic problem of the velocity of transmission of an excitation from one atom to another, which was posed by Fermi in 1932 and, in an improved version, by Ferretti in 1968. The problem is solved using Heisenberg operators. The transmission velocity is shown to exceed the light velocity. We argue that this acausal result is to be explained by the inadmissibly idealized description of the signal source used by Fermi and Ferretti.
    Remove from this list | Direct download (3 more)  
     
    My bibliography  
     
    Export citation  
  50. Mark S. Swanson (2000). Of Ghosts, Gauge Volumes, and Gauss's Law. Foundations of Physics 30 (3):359-370.
    The relationship between the canonical operator and the path integral formulation of quantum electrodynamics is analyzed with a particular focus on the implementation of gauge constraints in the two approaches. The removal of gauge volumes in the path integral is shown to match with the presence of zero-norm ghost states associated with gauge transformations in the canonical operator approach. The path integrals for QED in both the Feynman and the temporal gauges are examined and several ways of implementing the gauge (...)
    Remove from this list | Direct download (4 more)  
     
    My bibliography  
     
    Export citation  
1 — 50 / 53