  A formulation of the fermion action is discussed which includes an explicit
four momentum boost on the field prior to discretisation. This is used to shift
the zero of lattice momentum to lie near one of the on-shell quark poles. The
positive pole is selected if we wish to describe a valence quark, and negative
pole for a valence anti-quark. Like NRQCD, the typical lattice momenta involved
in hadronic correlation functions can be kept small: of order $O(a \Lambda_{\rm
QCD})$, rather than $O(a m_Q)$ even when describing heavy quarks. If we expand
around the particle pole, the anti-particle correlator will be poorly described
for large $a m_Q$. However, in that case the anti-particle will be far off
shell and will only affect unphysical, renormalization factors. The formulation
produces the correct continuum limit, and preliminary results have been
obtained (for an unimproved action) of both the one-loop self energy and a
non-perturbative correlation function.
