Conveners
(DTP) M1-2 Quantum Gravity and Cosmology | Gravité quantique et cosmologie (DPT)
- Ivan Booth
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Prof. Francesca Vidotto (The University of Western Ontario)27/05/2024, 10:30Theoretical Physics / Physique théorique (DTP-DPT)Invited Speaker / Conférencier(ère) invité(e)
Our universe is expected to emerge from an era dominated by quantum effects, for which a theory of quantum gravity is necessary. Loop Quantum Gravity, in its covariant formulation, provide a tentative yet viable framework to perform reliable computations about the physics of the early universe. In this talk I will review the strategy to be follow to apply the spinfoam formalism to cosmology. I...
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Viqar Husain (University of New Brunswick)27/05/2024, 11:00Oral (Non-Student) / Orale (non-étudiant(e))
I will describe recent work on gravitational collapse of dust using effective equations.
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Solutions of these equations exhibit formation of horizons, with a shock wave emerging as the horizons evaporate. The lifetime of a black hole turns out to be proportional to the square of its mass. -
Francesco Fazzini (University of New Brunswick)27/05/2024, 11:15Theoretical Physics / Physique théorique (DTP-DPT)Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)
Although black holes have recently been detected through gravitational wave observations and intensively studied through the past decades, we are far away from a complete understanding of their life cycle. In this presentation I'll show a loop quantum gravity-based model of star collapse in which the classical central singularity is replaced by a quantum bounce happening when the star energy...
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Jonathan Barenboim27/05/2024, 11:30Theoretical Physics / Physique théorique (DTP-DPT)Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)
Arguments from general relativity and quantum field theory suggest that black holes evaporate through Hawking radiation, but without a full quantum treatment of gravity the endpoint of the process is not yet understood. Two dimensional, semi-classical theories of gravity can be useful as toy models for studying black hole dynamics and testing predictions of quantum gravity. Of particular...
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Mr Mateo Pascual Gomez-Cuetara27/05/2024, 11:45Theoretical Physics / Physique théorique (DTP-DPT)Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)
Non-perturbative quantum geometric effects in loop quantum cosmology (LQC) result in a natural bouncing scenario without any violation of energy conditions or fine tuning. In this work we study numerically an early universe scenario combining a matter-bounce with an ekpyrotic field in an LQC background setting.
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We explore this unified phenomenological model for a spatially flat...