Free Particles

  • Bernd Thaller
Part of the Texts and Monographs in Physics book series (TMP)


The free Dirac equation describes a relativistic electron or positron which moves freely as if there were no external fields or other particles. Nevertheless this equation is important for the asymptotic description of interacting particles because in the limit of large times interacting particles tend to behave like free ones, provided their mutual separation increases.


Hilbert Space Dirac Equation Dirac Operator Negative Energy Free Particle 
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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • Bernd Thaller
    • 1
  1. 1.Institut für MathematikKarl-Franzens-Universität GrazGrazAustria

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