Speaker
Prof.
Ue-Li Pen
(University of Toronto, CITA)
Description
Recent implications of results from quantum information theory applied
to black holes has led to the confusing conclusions that requires
either abandoning the equivalence principle (e.g. the firewall
picture), or the no-hair theorem (e.g. the fuzzball picture), or even
more unpalatable options.
The recent discovery of a pulsar orbiting a black hole opens up new
possibilities for tests of theories of gravity. We examine possible
observational effects of semiclassical quantum gravity in the vicinity
of black holes, as probed by pulsars and event horizon telescope
imaging of flares. Pulsar radiation is observable at wavelengths only
two orders of magnitude shorter than the Hawking radiation, so
precision interferometry of lensed pulsar images may shed light on the
quantum gravitational processes and interaction of Hawking radiation
with the spacetime near the black hole. This paper discusses the
impact on the pulsar radiation interference pattern, which is
observable through the modulation index in the foreseeable future, and
discusses a possible classical limit of BHC.
Author
Prof.
Ue-Li Pen
(University of Toronto, CITA)
