  The classical electromagnetic and gravitomagnetic fields in the vacuum, in
(3+2) dimensions, described by the Maxwell-Nordstrom equations, are quantized.
These equations are rederived from the field tensor which follows from a
five-dimensional form of the Dirac equation. The electromagnetic field depends
on the customary time t, and the hypothetical gravitomagnetic field depends on
the second time variable u. The total field energy is identified with the
component T44 of the five-dimensional energy-stress tensor of the
electromagnetic and gravitomagnetic fields. In the ground state, the
electromagnetic field and the gravitomagnetic field energies cancel out. The
quanta of the gravitomagnetic field have spin 1.
