General Relativity and Gravitation

, Volume 16, Issue 4, pp 325–332

The normal-form (In)dependence of the adiabatic particle definitions

  • Tevian Dray
  • Jürgen Renn
Research Articles


The adiabatic particle definition of Parker [1] has only been discussed for particular choices of the field variable and time coordinate, referred to here as the choice of a normal-form. It seems to have been implicitly assumed that the associated vacuum is independent of the normal-form chosen; we show that this is indeed the case.


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Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • Tevian Dray
    • 1
  • Jürgen Renn
    • 1
  1. 1.FB PhysikFreie Universität BerlinBerlin 33West Germany
  2. 2.Instituut voor Theoretische FysicaUtrechtThe Netherlands

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