  We propose a compact atom interferometer to measure homogeneous constant
forces guiding the arms via shortcuts to adiabatic paths. For a given
sensitivity, which only depends on the space-time area of the guiding paths,
the cycle time can be made fast without loosing visibility. The atom is driven
by spin-dependent trapping potentials moving in opposite directions,
complemented by linear and time-dependent potentials that compensate the trap
acceleration. Thus the arm states are adiabatic in the moving frames, and
non-adiabatic in the laboratory frame. The trapping potentials may be
anharmonic, e.g. optical lattices, and the interferometric phase does not
depend on the initial motional state or on the pivot point for swaying the
linear potentials.
