Landau gauge

Here for c 1 we have the Feynman gauge, and , = 0 is the Landau gauge. This gauge fixing term will enter into the massive boson propagators for the A 3 field. The propagator will be of the form... 

The form of the free photon propagator depends on the choice of gauge, that is the parameter 1 in the Lagrangian (2.1). In Landau gauge, corresponding to the choice A = oo, one has... 

Next, I would like to discuss intricacy of CP violation. In gauge theories one may compute the fundamental CP asymmetry, namely the difference of baryon numbers between particle and antiparticle decays using perturbation theory. It is thus given by an interference term of, for instance, the tree and the one-loop contributions. A convenient tool of computing the interference term is the Landau-Cutkovsky rule [19]. The result is like... 

For the present purpose, however, Landau gauge is most adequate, corresponding to the choice A = >,... 

Table 12.5 The oscillator strengths of the El transitions in Eul (Table 12.4) theoretical data - the Coulomb approximation method (columns A, B and C are corresponding to the gauges of the photon propagator Coulomb, Babushkin, Landau), multiconfiguration DF method (column D), experimental data (columns El, E2)...

We want to derive the quantization of energy and flux of the Landau levels in the quantum Hall effect. Assume that the magnetic field is generated by a vector potential A = (-yH, 0,0), which is known as the Landau gauge. The Schrodinger equation for electrons confined in the xy plane is... 

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