  We develop an exact generalized Bogoliubov transformation for the spin 3/2
Hubbard model with large anti-Hunds rule coupling near half filling. Since our
transformation is unitary, we can thereafter employ standard approximate mean
field theory methods in the full Hilbert space to analyze the doped Mott
insulator, in contrast to a conventional approach based on truncated Hilbert
spaces complemented with hard core constraints. The ground state at exactly
half filling is an insulating (Mott) singlet, and according to our analysis a
non-Fermi liquid order parameter $ \Delta $ usually associated with extended
s-wave superconductivity, will appear self-consistently as soon as a finite
density $ n $ holes are introduced. The non-Fermi liquid behavior is a
consequence of the nonlinear nature of the unitary transformation mapping the
Mott singlet state to a Fock vacuum which introduces anomalous terms such as
$\Delta n$ in the effective Lagrangian. Our analysis uses an approach that
generalizes readily to multi-band Hubbard models and could provide a mechanism
whereby a non-Fermi liquid order parameter proportional to density is developed
in Mott insulators with locally entangled ground states. For more complicated
systems, such an order parameter could coexist naturally with a variety of
other order parameters.
