Hamiltonian analysis of Poincaré gauge theory scalar modes
Hwei-jang Yo, James M. Nester
Abstract
The Hamiltonian constraint formalism is used to obtain the first explicit complete analysis of non-trivial viable dynamic modes for the Poincaré gauge theory of gravity. Two modes with propagating spin-zero torsion are analyzed. The explicit form of the Hamiltonian is presented. All constraints are obtained and classified. The Lagrange multipliers are derived. It is shown that a massive spin-0- mode has normal dynamical propagation but the associated massless 0- is pure gauge. The spin-0+ mode investigated here is also viable in general. Both modes exhibit a simple type of ``constraint bifurcation'' for certain special field/parameter values.
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