منابع مشابه
Asymptotic Freedom from Thermal and Vacuum Magnetization
We calculate the effective Lagrangian for a magnetic field in spinor, scalar and vector QED. Connections are then made to SU(NC) Yang–Mills theory and QCD. The magnetization and the corresponding effective charge are obtained from the effective Lagrangian. The renormalized vacuum magnetization will depend on the renormalization scale chosen. In the absence of any natural scale, it is thus of li...
متن کاملVacuum polarization in thermal QED with an external magnetic field
The one-loop vacuum polarization tensor is computed in QED with an external constant, homogeneous magnetic field at finite temperature. The Schwinger proper-time formalisme is used and the computations are done in Euclidian space. The well-known results are recovered when the temperature and/or the magnetic field are switched off and the effect of the magnetic field on the Debye screening is di...
متن کاملSONOLUMINESCENCE AND THE QED VACUUM a
In this talk I shall describe an extension of the quantum-vacuum approach to sono-luminescence proposed several years ago by J. Schwinger. We shall first consider a model calculation based on Bogolubov coefficients relating the QED vacuum in the presence of an expanded bubble to that in the presence of a collapsed bubble. In this way we shall derive an estimate for the spectrum and total energy...
متن کاملEffective Field Theory for Qed Vacuum Fluctuations
Only photons are dynamical degrees of freedom in the QED vacuum at energies well below the electron mass m. Their interactions via couplings to virtual electron-positron pairs are described to lowest order by an effective theory incorporating the Uehling and Euler-Heisenberg interactions as dominant terms. By a redefinition of the electromagnetic field, the Uehling term is shown not to contribu...
متن کاملMagnetic permeability of constrained scalar QED vacuum
We compute the influence of boundary conditions on the Euler-Heisenberg effective Lagrangian scalar QED scalar for the case of a pure magnetic field. The boundary conditions constrain the quantum scalar field to vanish on two parallel planes separeted by a distance a and the magnetic field is assumed to be constant, uniform and perpendicular to the planes. The effective Lagrangian is obtained u...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1995
ISSN: 0556-2821
DOI: 10.1103/physrevd.51.5885