Spin-0 and spin-1/2 particles in a constant scalar-curvature background. (Q1426407)

The main question that the authors deal with is how much the spin of quantum particles is important in quantum gravity phenomena. The model under consideration deals with a semi-infinite laboratory with a certain rather complicated Lorentzian metric, corresponding to a perfect fluid and having a constant scalar curvature. In some energy regions the energy eigenvalues for spin-0 and spin-1/2 particles are obtained and shown that they do not coincide. The spin-0 particles have a certain ground state energy while the kinetic energy of spin-1/2 particles may be equal to any positive value.