Format results
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Gyroscopic gravitational memory from binary systems
Ali Seraj - Université Libre de Bruxelles
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The Corners of 1+1 Dimensional Quantum Gravity
Ludovic Varrin - National Centre for Nuclear Research (NCBJ)
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Quantum Gravity Seminar Series - TBA
Bianca Dittrich - Perimeter Institute for Theoretical Physics
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Curvature correlators in nonperturbative 2D Lorentzian quantum gravity
Renate Loll - Radboud Universiteit Nijmegen
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Embedding generalised LTB models in polymerised spherically symmetric models: formalism and applications
Kristina Giesel - University of Erlangen-Nuremberg
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Type I von Neumann algebras from gravitational path integrals: Ryu–Takayanagi as entropy without holography
Eugenia Colafranceschi - University of California, Santa Barbara
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Loop corrected subleading soft graviton theorem from anomalous BRST Ward identity
Tom Wetzstein - Laboratory of Theoretical and High Energy Physics
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Free-falling in Quantum Spacetime
Maulik Parikh - Arizona State University
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Renormalized Volume/Area from Conformal Gravity
Rodrigo Olea - Universidad Andrés Bello
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Sifting quantum black holes through the principle of least action
Alessia Platania - University of Copenhagen
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Gyroscopic gravitational memory from binary systems
Ali Seraj - Université Libre de Bruxelles
I will review the "gyroscopic gravitational memory”, the permanent effect of gravitational waves on freely-falling gyroscopes far from the source of gravitational radiation. Then, I will compute the effect created by binary systems in the post-Newtonian approximation. The discussion naturally… -
The Corners of 1+1 Dimensional Quantum Gravity
Ludovic Varrin - National Centre for Nuclear Research (NCBJ)
The concept of symmetries is crucial in our comprehension of modern theoretical physics. The Corner Proposal introduces a novel framework where symmetries are reinstated as foundational principles in our understanding of gravity. This aims to describe gravity using a language that is more adapted to… -
Quantum Gravity Seminar Series - TBA
Bianca Dittrich - Perimeter Institute for Theoretical Physics
Abstract TBA --- Zoom link -
Curvature correlators in nonperturbative 2D Lorentzian quantum gravity
Renate Loll - Radboud Universiteit Nijmegen
Correlation functions are ubiquitous in quantum field theory, but their use in quantum gravity beyond perturbative and asymptotically flat regimes has been limited, due to difficulties with diffeomorphism invariance and the dynamical nature of geometry. We address these challenges in the context of… -
Embedding generalised LTB models in polymerised spherically symmetric models: formalism and applications
Kristina Giesel - University of Erlangen-Nuremberg
At the classical level, one can restrict a spherically symmetric model to the corresponding LTB sector by requiring that a so-called LTB condition is satisfied. In this talk we will discuss how this can be generalised in the context of effective models containing quantum gravity inspired… -
From fluctuating gravitons to Lorentzian quantum gravity
I will review recent progress in the asymptotic safety approach to quantum gravity. This includes the computation of momentum-dependent graviton correlation functions, the structure of the Standard Model with asymptotically safe gravity, and the recent first computation directly in space-times with… -
Type I von Neumann algebras from gravitational path integrals: Ryu–Takayanagi as entropy without holography
Eugenia Colafranceschi - University of California, Santa Barbara
We show that the Ryu-Takayanagi (RT) formula, originally introduced to compute the entropy of a holographic boundary CFT, can be interpreted as entropy of an algebra of bulk gravitational observables. In particular, we show that any Euclidean gravitational path integral satisfying a simple and… -
Loop corrected subleading soft graviton theorem from anomalous BRST Ward identity
Tom Wetzstein - Laboratory of Theoretical and High Energy Physics
Extended BMS symmetry is believed to be a fundamental symmetry of any classical gravitational scattering process, as well as of the quantum gravity S-matrix. We explore this property using the BRST formulation of BMS symmetry, which allows to construct a non trivial solution of the Wess-Zumino… -
Free-falling in Quantum Spacetime
Maulik Parikh - Arizona State University
When the spacetime metric is regarded as a quantum field, the classical trajectories of freely falling objects are subject to random fluctuations, or “noise”. This fundamental noise might even be observable at gravitational wave detectors: if detected, it would provide experimental evidence for the… -
Renormalized Volume/Area from Conformal Gravity
Rodrigo Olea - Universidad Andrés Bello
We explore the physical consequences of embedding Einstein gravity with negative cosmological constant in Conformal Gravity in four dimensions. In the bulk, the procedure is equivalent to Holographic Renormalization, as the Einstein-AdS action appears augmented by the correct boundary counterterms… -
Sifting quantum black holes through the principle of least action
Alessia Platania - University of Copenhagen
We tackle the question of whether regular black holes or other alternatives to the Schwarzschild solution can arise from an action principle in quantum gravity. Focusing on an asymptotic expansion of such solutions and inspecting the corresponding field equations, we demonstrate that their… -
Invariant observables in quantum gravity and graviton loop corrections to the Hubble rate and the Newtonian potential - VIRTUAL
Markus Fröb - Universität Leipzig
I present work done in the last years on the construction of dynamical coordinate systems for highly symmetric backgrounds, such as Minkowski, de Sitter, and FLRW cosmologies, and which are needed in the relational approach to construct gauge-invariant observables in gravity. I show that it is…