Maxwell–Chern–Simons theory for curved spacetime backgrounds

E. Kant, F.R. Klinkhamer
2005 Nuclear Physics B  
We consider a modified version of four-dimensional electrodynamics, which has a photonic Chern-Simons-like term with spacelike background vector in the action. Light propagation in curved spacetime backgrounds is discussed using the geometrical-optics approximation. The corresponding light path is modified, which allows for new effects. In a Schwarzschild background, for example, there now exist stable bounded orbits of light rays and the two polarization modes of light rays in unbounded orbits
more » ... in unbounded orbits can have different gravitational redshifts. An Erratum with important corrections has been published, which appears as Appendix E in this arXiv version.
doi:10.1016/j.nuclphysb.2005.09.045 fatcat:dtifockctfgv7mdsf25quvribi