, Volume 16, Issue 4, pp 325-332

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

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Abstract

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.

NATO Postdoctoral Fellow.