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Atlantic GR Seminar: Sharmila Gunasekaran Gnanam (MUN) and Robert Santacruz (UNB)

July 29, 2020 @ 1:00 pm - 2:00 pm

Slow decay of waves in gravitational solitons

Sharmila Gunasekaran Gnanam
Memorial University of Newfoundland

Gravitational solitons are globally stationary horizonless asymptotically flat spacetimes. In this talk, I will describe the methodology used to prove that massless scalar waves in a particular family of soliton spacetimes decay very slowly. The proof involves the construction of quasimodes which are approximate solutions to the wave equation. This slow decay can be attributed to the stable trapping of null geodesics and is suggestive of instability at the nonlinear level. This is joint work with Hari Kunduri.

Quantizing gravity is not that hard if you know how: An undergraduate guide to black holes

Robert Santacruz
University of New Brunswick

It is expected that singularities appearing in GR are to be resolved in a theory of Quantum Gravity. In the context of Loop Quantum Gravity, the Big Bang singularity is replaced by a bounce and so one would assume that this can be translated into Black Holes. In this talk I will explain you how to find an effective model for Schwarzschild black hole by using Loop Quantum Cosmology techniques and, the best part is, you only need Hamiltonian Mechanics!!

The Atlantic General Relativity 2020 online postdoc/student seminar series is in the tradition of the annual AGR meetings, providing a forum not only for students and postdocs to present their research and make professional contacts but also to facilitate connections and collaborations between all Atlantic Canadian relativists. The series is student-organized and includes all areas of classical and quantum gravity. Talks will occur on the last Wednesday of every month, with each session consisting of two 30 minute talks. If you would like to attend, please email the organizers for connection details.

Details

Date:
July 29, 2020
Time:
1:00 pm - 2:00 pm
Event Category:

Venue

Zoom seminar

COVID-19 impacts on AARMS activities