Flux-Across-Surfaces Theorem for a Dirac Particle

Details Flux-Across-Surfaces Theorem for a Dirac Particle Flux-Across-Surfaces Theorem for a Dirac Particle

2002-07-05

arxiv.org/abs/math-ph/0207010v2

Physics

Mathematical Physics

Scientific paper

10.1063/1.1528276

We consider the asymptotic evolution of a relativistic spin-1/2-particle. i.e. a particle whose wavefunction satisfies the Dirac equation with external static potential. We prove that the probability for the particle crossing a (detector) surface converges to the probability, that the direction of the momentum of the particle lies within the solid angle defined by the (detector) surface, as the distance of the surface goes to infinity. This generalizes earlier non relativistic results, known as flux across surfaces theorems, to the relativistic regime.

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