Wheeler propagator of the Lorentz invariant thermal energy propagation (Q601816)

In this paper the authors discussed the Lorentz invariant thermal energy propagation in the field theory of dissipative transport processes, in which the temperature field satisfies a covariant field equation of a (wave like) thermal energy propagation with finite speed-less than the speed of light in contract to the usual local equilibrium temperature including the classical Fourier's heat conduction. In the early work, they gave the existence of a dynamical phase transition between the two kinds of propagation, between a wave and a non wave, i.e., a dynamical phase transition between a non-dissipative and a dissipative thermal process. In this paper they calculated the wheel propagator of the Lorentz invariant energy propagation.