Authors: Steven Hergt, Jan Steinhoff, Gerhard Schaefer
Date: 10 Oct 2011
Abstract: The present paper addresses open questions regarding the handling of the spin supplementary condition within the effective field theory approach to the post-Newtonian approximation. In particular it is shown how the spin supplementary condition can be eliminated at the level of the potential and how the dynamics can be cast into a fully reduced Hamiltonian form. Two different methods are used and compared, one based on the well-known Dirac bracket and the other based on an action principle. It is discussed how the latter approach can be used to improve the Feynman rules by formulating them in terms of reduced canonical spin variables.
© M. Vallisneri 2012 — last modified on 2010/01/29
Tantum in modicis, quantum in maximis