Hawking Radiation from near extremal black holes
Mykhaylo Usatyuk
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Imprints of Cosmic Topology from Early-Universe Quantum Effects
Anna Negro - Case Western Reserve University
Can the radiation era extend back to the bang?
Vatsalya Vaibhav - Higgs Centre for Theoretical Physics, University of Edinburgh
Dynamical Wick Rotation
Barbara Soda - Perimeter Institute for Theoretical Physics
On the action principle in space-times with boundary
Kostas Tzanavaris - Max Planck Institute for Gravitational Physics (AEI)
Lecture - Quantum Matter, PHYS 777
Chong Wang - Perimeter Institute for Theoretical Physics
Quantum gravity fluctuations at long distances
Ben Freivogel - Universiteit van Amsterdam
Lecture - Time, Causality, and the Structure of Quantum Theory
Lucien Hardy - Perimeter Institute for Theoretical Physics
Lecture - Mathematical Physics II, PHYS 777
Kevin Costello - Perimeter Institute for Theoretical Physics
Data-Driven High-Dimensional Inverse Problems: A Journey Through Strong Gravitational Lensing
Laurence Perreault-Levasseur
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Hawking Radiation from near extremal black holes
Mykhaylo Usatyuk
Over the last few years it has been understood that black holes sufficiently close to extremality receive large quantum corrections that modify their thermodynamic properties. In this talk I will explain how these large quantum corrections modify the real time dynamics of near-extremal black holes… 
Holographic phase transitions via thermally-assisted tunneling
Arpon Paul
We construct the thermal bounce solution in holographic models that describes first-order phase transitions between the deconfined and confined phases in strongly-coupled gauge theories. This new, periodic Euclidean solution represents transitions that occur via thermally-assisted tunneling and…-
Imprints of Cosmic Topology from Early-Universe Quantum Effects
Anna Negro - Case Western Reserve University
Is the Universe infinite in all spatial directions? The answer may lie in the interplay between cosmic topology and quantum effects in the early universe. There are eighteen distinct topologies compatible with spatially flat Friedmann-Lemaître-Robertson-Walker solutions of Einstein’s equations… -
Can the radiation era extend back to the bang?
Vatsalya Vaibhav - Higgs Centre for Theoretical Physics, University of Edinburgh
Recent work has shown that a cosmological model in which the radiation era extends back to the Big Bang, with CPT-symmetric initial conditions, can provide a minimalistic explanation for many of the observed features of the early universe (homogeneity, isotropy, flatness, the CMB acoustic… -
Dynamical Wick Rotation
Barbara Soda - Perimeter Institute for Theoretical Physics
I will show how dynamical Wick rotation can reconcile the no boundary proposal of Hartle and Hawking with the fundamental Lorentz symmetry, despite previously demonstrated issues. The dynamical Wick rotation arises from quantum field fluctuations sourcing disorder for background geometry… -
On the action principle in space-times with boundary
Kostas Tzanavaris - Max Planck Institute for Gravitational Physics (AEI)
In this talk, I will present a general methodology for assigning boundary conditions to boundaries of a space-time, which may or may not be singular, using the action principle alone. It is shown that Kasner-like solutions cannot satisfy this action principle, when the initial singularity is… -
Strong Dynamics in the Early Universe
Rashmish Mishra
Cosmological probes of new physics scenarios provide a powerful complementary probe to traditional earth-based experiments. Strongly coupled new physics and their holographic duals, well-motivated and well-studied in the literature, can provide signals in the early universe that are unique - from a… -
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Quantum gravity fluctuations at long distances
Ben Freivogel - Universiteit van Amsterdam
I will address the question: In what situations are perturbative quantum gravity effects important at distances much longer than the Planck scale. Among other examples, I will calculate the quantum fluctuations of the black hole horizon. -
Lecture - Time, Causality, and the Structure of Quantum Theory
Lucien Hardy - Perimeter Institute for Theoretical Physics
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Lecture - Mathematical Physics II, PHYS 777
Kevin Costello - Perimeter Institute for Theoretical Physics
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Data-Driven High-Dimensional Inverse Problems: A Journey Through Strong Gravitational Lensing
Laurence Perreault-Levasseur