  We attempt to construct a gravitational coupling by pre-selecting an
energy-momentum tensor as the source for gravitational field. The
energy-momentum tensor we take is a recently derived new expression motivated
by joint localization of energy and momentum in quantum measurement. This
energy-momentum tensor differs from the traditional canonical and symmetric
ones, and the theory we obtain is of an Einstein-Cartan type, but derived from
a minimal coupling of a Lagrangian with second-derivative, and leads to
additional interaction between torsion and matter, including the scalar field.
For the scalar field, the theory can also be derived in the Riemann space-time
by a non-minimal coupling. Our study gives hint on more general tests of
general relativistic effects.
