  We investigate non-inertial and gravitational effects on quantum states in
electromagnetic fields and present the analytic solution for energy eigenstates
for the Schr\"odinger equation including non-inertial, gravitational and
electromagnetic effects. We find that in addition to the Landau quantization
the rotation of spacetime itself leads to the additional quantization, and that
the energy levels for an electron are different from those for a proton at the
level of gravitational corrections.
