Events Calendar

Quantum Black Holes in the Sky..., Niayesh Afshordi

Thursday, March 29, 2018
1:30 pm - 2:30 pm
Physics & Astronomy Building (PAB)
Room: 100

Department of Physics and Astronomy


Dr. Niayesh Afshordi

Department of Physics and Astronomy
University of Waterloo
and Perimeter Institute for Theoretical Physics

Quantum Black Holes in the Sky: from Quantum Gravity to Astrophysics and Cosmology


In classical General Relativity (GR), an observer falling into an astrophysical black hole (BH) is not expected to experience anything dramatic as she crosses the event horizon. However, tentative resolutions to problems in quantum gravity, such as the cosmological constant problem or the black hole information paradox, invoke significant departures from classicality in the vicinity of the horizon. I outline theoretical and phenomenological arguments for these departures. I will then discuss the tentative observational evidence for Planck-scale structure near BH horizons, seen as “echoes” in gravitational wave observations, which has now been found by three independent groups. Finally, I show how gravitational wave echoes can teach us about the fate of the binary neutron star merger, recently discovered by gravitational wave and electromagnetic observations.

STUDENTS – after the talk, you’re encouraged to return to the 2nd floor Atrium lounge to meet with the speaker. 
COFFEE – coffee and cookies will be available in the 2nd floor Atrium lounge at 1:15 p.m.
CELL PHONES – as a courtesy to the speaker and audience, please set your cellphones to “silent” mode. Thanks!
Prof. S. Basu
Jodi Guthrie - Assistant to the Chair
519-661-2111 ext.86438
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