PIRSA:12100058 Scientific Series Quantum Gravity

DOI10.48660/12100058

Conference/School: Experimental Search for Quantum Gravity 2012

Granot, J. (2012). Astrophysical Searches for Quantum Gravity Signals . Perimeter Institute. https://pirsa.org/12100058

Granot, Jonathan. Astrophysical Searches for Quantum Gravity Signals . Perimeter Institute, Oct. 24, 2012, https://pirsa.org/12100058 

@misc{ pirsa_PIRSA:12100058,
  doi = {10.48660/12100058},
  url = {https://pirsa.org/12100058},
  author = {Granot, Jonathan},
  keywords = {Quantum Gravity},
  language = {en},
  title = {Astrophysical Searches for Quantum Gravity Signals },
  publisher = {Perimeter Institute},
  year = {2012},
  month = {oct},
  note = {PIRSA:12100058 see, \url{https://pirsa.org}}
}

Abstract

Some recent searches for quantum gravity signatures using observations of distant astrophysical sources will be discussed, focusing on the search for Lorentz invariance violation (LIV) in the form of a dependence of the photon propagation speed on its energy. Fermi gamma-ray space telescope observations of ~8 keV to ~30 GeV photons from a short (< 1 s) gamma-ray burst (GRB 090510) at a cosmological distance (z = 0.903), enabled for the first time to put a direct time of flight limit on a possible linear variation of the speed of light with photon energy that is beyond the Planck scale. Parameterizing |v/c-1| = E/E_{QG} our most conservative limits are E_{QG}/E_{Planck} > 1.2, while less conservative limits are up to 1-2 orders of magnitude stricter. Other types of astrophysical searches for LIV will be briefly outlined, along with some prospects for the future.

Resources

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