Corpus ID: 14026334

Astrophysical signals of P and T violation by gravity

  title={Astrophysical signals of P and T violation by gravity},
  author={A. R. Prasanna and Subhendra Mohanty},
  journal={arXiv: Astrophysics},
We study the observational consequences of the leading order P and T violating gauge invariant graviton-photon interactions. Such interactions give rise to gravitational birefringence - the velocity of light signals depends upon their polarisation, which is absent in Einstein's gravity. Using experimentally established limits on the differential time delay in the radio signals from pulsars we put constraints on the magnitude of P and T violating graviton-photon couplings. 
Cosmological Background torsion limits from Lorentz violation
Cosmological limits on Lorentz invariance breaking in Chern-Simons $(3+1)-dimensional$ electrodynamics are used to place limits on torsion. Birefrigence phenomena is discussed by using extending theExpand