Quantum gravity is concerned with unifying Einstein's general theory of relativity with quantum theory into a single theoretical framework. At Perimeter Institute, researchers are actively pursuing a number of approaches to this problem including loop quantum gravity, spin foam models, asymptotic safety, emergent gravity, string theory, and causal set theory. We are also particularly interested in experimental implications of these different proposals. As the aim is a unification of the laws of physics into a single theory, the search for quantum gravity overlaps with other areas such as cosmology, particle physics and the foundations of quantum theory.
Format results
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15 talks-Collection Number C17010
Talk
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 1
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 2
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 3
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 4
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 5
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 6
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 7
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 8
Maïté Dupuis Perimeter Institute for Theoretical Physics
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Infrared Problems in QED and Quantum Gravity
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It from Qubit Summer School
62 talks-Collection Number C16003Talk
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Gravity Basics - 1
Veronika Hubeny University of California, Davis
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QI Basics - 1
Patrick Hayden Stanford University
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Entanglement - 1
Robert Spekkens Perimeter Institute for Theoretical Physics
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GR: Actions and Equations
David Kubiznak Charles University
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A new perspective on holographic entanglement
Matthew Headrick Brandeis University
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Bell’s Theorem
Adrian Kent University of Cambridge
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QI Basics - 2
John Watrous IBM (Canada)
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Time in Cosmology
14 talks-Collection Number C16016Talk
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Welcome and Opening Remarks
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Marina Cortes Institute for Astrophysics and Space Sciences
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Lee Smolin Perimeter Institute for Theoretical Physics
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Neil Turok University of Edinburgh
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The origin of arrows of time II
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Sean Carroll California Institute of Technology (Caltech) - Division of Physics Mathematics & Astronomy
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Marina Cortes Institute for Astrophysics and Space Sciences
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Tim Koslowski Universidad Nacional Autónoma De Mexico (UNAM)
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The origin of arrows of time II cont.
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Sean Carroll California Institute of Technology (Caltech) - Division of Physics Mathematics & Astronomy
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Marina Cortes Institute for Astrophysics and Space Sciences
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Tim Koslowski Universidad Nacional Autónoma De Mexico (UNAM)
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Testing time asymmetry in the early universe
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Brian Keating University of California, San Diego
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Andrew Liddle University of Lisbon
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Richard Muller University of California, Berkeley
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The fate of the big bang
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Abhay Ashtekar Pennsylvania State University
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Neil Turok University of Edinburgh
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Time as Organization – Downward Caustation, Structure and Complexity I
Barbara Drossel Technische Universität Darmstadt
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Time as Organization – Downward Caustation, Structure and Complexity II
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Stuart Kauffman Santa Fe Institute
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George Ellis University of Cape Town
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Quantum Information in Quantum Gravity II
31 talks-Collection Number C15041Talk
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Gravity Dual of Quantum Information Metric
Tadashi Takayanagi Yukawa Institute for Theoretical Physics
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A new perspective on holographic entanglement
Matthew Headrick Brandeis University
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Universal holographic description of CFT entanglement entropy
Thomas Faulkner University of Illinois Urbana-Champaign
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Geometric Constructs in AdS/CFT
Veronika Hubeny University of California, Davis
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Do black holes create polyamory
Jonathan Oppenheim University College London
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Tensor Network Renormalization and the MERA
Glen Evenbly Georgia Institute of Technology
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Entanglement renormalization for quantum fields
Jutho Haegeman Ghent University
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Holographic quantum error-correcting codes: Toy models for the bulk/boundary correspondence
Fernando Pastawski California Institute of Technology
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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 Lecture
Aldo Riello Perimeter Institute for Theoretical Physics
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Quantum Gravity Lecture
Aldo Riello Perimeter Institute for Theoretical Physics
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Quantum Gravity Lecture
Aldo Riello Perimeter Institute for Theoretical Physics
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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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Quantum Gravity Lecture
Aldo Riello Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity (Dupuis)
15 talks-Collection Number C17010PSI 2016/2017 - Explorations in Quantum Gravity (Dupuis) -
Infrared Problems in QED and Quantum Gravity
-Collection Number C16048Infrared Problems in QED and Quantum Gravity
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Quantum Information in Quantum Gravity II
31 talks-Collection Number C15041Quantum Information in Quantum Gravity II -
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 quantization. In this presentation, I will start by providing an overview of the essential results leading to the main ideas the proposal. This will then allow me to state the proposal in the general case to then specialize to 1+1 dimensional gravity.
Finally, I will present elements of our recent research applying the proposal to the case of 1+1 dimensional gravity. I will demonstrate the framework's promising potential by calculating the entanglement entropy between two spatial regions—a significant challenge in quantum gravity. The result is the 1+1 dimensional equivalent of the well-established Bekenstein-Hawking area law governing the entropy of gravitational systems with the expected behavior of the quantum corrections.
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Quantum Gravity Lecture
Aldo Riello Perimeter Institute for Theoretical Physics
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Quantum Gravity Lecture
Aldo Riello Perimeter Institute for Theoretical Physics
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Quantum Gravity Lecture
Aldo Riello Perimeter Institute for Theoretical Physics
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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 nonperturbative quantum gravity, motivated by the goal of computing geometric correlators from first principles, as a possible window to early-universe cosmology. I will report on recent work in 2D Lorentzian quantum gravity, formulated in terms of causal dynamical triangulations, which demonstrates the feasibility of constructing and measuring manifestly diffeomorphism-invariant curvature correlators. I will discuss some unusual features of the connected correlators and new results on their behaviour in two dimensions, obtained with the help of Monte Carlo simulations.
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Quantum Gravity Lecture
Aldo Riello Perimeter Institute for Theoretical Physics