Format results
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Talk
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Semisimple Hopf algebras and fusion categories
Cesar Galindo Universidad de los Andes
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The Hopf C*-algebraic quantum double models - symmetries beyond group theory
Andreas Bauer Freie Universität Berlin
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Modular categories and the Witt group
Michael Mueger Radboud Universiteit Nijmegen
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Topological Quantum Computation
Eric Rowell Texas A&M University
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Gapped phases of matter vs. Topological field theories
Davide Gaiotto Perimeter Institute for Theoretical Physics
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An Introduction to Hopf Algebra Gauge Theory
Derek Wise University of Erlangen-Nuremberg
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Kitaev lattice models as a Hopf algebra gauge theory
Catherine Meusburger University of Erlangen-Nuremberg
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Topological defects and higher-categorical structures
Jurgen Fuchs Karlstad University
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Talk
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Welcome and Opening Remarks
Bianca Dittrich Perimeter Institute for Theoretical Physics
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Introduction to Monte Carlo methods - 1
Gerard Barkema Utrecht University
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Introduction to Monte Carlo methods - 2
Gerard Barkema Utrecht University
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Introduction to Tensor Network methods - 1
Guifre Vidal Alphabet (United States)
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Introduction to Tensor Network methods - 2
Guifre Vidal Alphabet (United States)
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Tutorial: Introduction to Monte Carlo Methods
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Gerard Barkema Utrecht University
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Nilas Klitgaard Radboud Universiteit Nijmegen
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Tutorial: Introduction to Tensor Network methods
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Guifre Vidal Alphabet (United States)
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Clement Delcamp Institut des Hautes Etudes Scientifiques (IHES)
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Scientific Computing and Computational Science
Erik Schnetter Perimeter Institute for Theoretical Physics
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Talk
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Shape Dynamics: Perspectives and Problems
Julian Barbour University of Oxford
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The quantum equation of state of the universe produces a small cosmological constant
Tim Koslowski Technical University of Applied Sciences Würzburg-Schweinfurt
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Inflationary and pre-inflationary dynamics with the Starobinsky potential
Beatrice Bonga Radboud Universiteit Nijmegen
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Relationalism and the speed of light: Are we in a relationship?
Yuri Bonder Universidad Nacional Autónoma De Mexico (UNAM)
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Compact spherically symmetric solutions and gravitational collapse in SD
Flavio Mercati University of Naples Federico II
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Self-gravitating fluid solutions of Shape Dynamics
Daniel Guariento Conestoga College
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A Weyl-Type Theorem in Geometrized Newtonian Gravity, and How It May Bear on Shape Dynamics
Erik Curiel Ludwig-Maximilians-Universität München (LMU)
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Talk
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 15
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 14
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 13
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 12
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 11
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 10
Maïté Dupuis Perimeter Institute for Theoretical Physics
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PSI 2016/2017 - Explorations in Quantum Gravity - Lecture 9
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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Talk
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PSI 2016/2017 - Relativity - Lecture 14
Neil Turok University of Edinburgh
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PSI 2016/2017 - Relativity - Lecture 13
Neil Turok University of Edinburgh
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PSI 2016/2017 - Relativity - Lecture 12
Neil Turok University of Edinburgh
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PSI 2016/2017 - Relativity - Lecture 11
Neil Turok University of Edinburgh
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PSI 2016/2017 - Relativity - Lecture 10
Neil Turok University of Edinburgh
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PSI 2016/2017 - Relativity - Lecture 9
Neil Turok University of Edinburgh
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PSI 2016/2017 - Relativity - Lecture 7
Neil Turok University of Edinburgh
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Talk
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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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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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GR: Actions and Equations
David Kubiznak Charles University
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QI Basics - 2
John Watrous IBM (Canada)
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Talk
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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 Technical University of Applied Sciences Würzburg-Schweinfurt
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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 Technical University of Applied Sciences Würzburg-Schweinfurt
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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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Talk
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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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Talk
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Welcome to Perimeter Institute and the EHT 2014 Conference
Neil Turok University of Edinburgh
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Introduction to EHT
Shep Doeleman Harvard University
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Growth of supermassive black holes and their relationships to their host galaxies
Marta Volonteri Institut d'Astrophysique de Paris
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Polarized emission from Black Hole Accretion Disks and Jets
Jonathan McKinney University of Maryland, College Park
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Stellar Orbits at the Galactic Center
Andrea Ghez University of California, Los Angeles
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The Size and Morphology of Sgr A* at 7mm
Geoff Bower Academia Sinica
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Particle Acceleration and Non-thermal Emission in Radiatively Inefficient Accretion Flows
Eliot Quataert University of California, Berkeley
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Quantum Gravity and Effective Topology
Renate Loll Radboud Universiteit Nijmegen
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Hopf Algebras in Kitaev's Quantum Double Models: Mathematical Connections from Gauge Theory to Topological Quantum Computing and Categorical Quantum Mechanics
The Kitaev quantum double models are a family of topologically ordered spin models originally proposed to exploit the novel condensed matter phenomenology of topological phases for fault-tolerant quantum computation. Their physics is inherited from topological quantum field theories, while their underlying mathematical structure is based on a class of Hopf algebras. This structure is also seen across diverse fields of physics, and so allows connections to be made between the Kitaev models and topics as varied as quantum gauge theory and modified strong complementarity. This workshop will explore this shared mathematical structure and in so doing develop the connections between the fields of mathematical physics, quantum gravity, quantum information, condensed matter and quantum foundations.
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Making Quantum Gravity Computable
Making Quantum Gravity Computable
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PSI 2016/2017 - Explorations in Quantum Gravity (Dupuis)
PSI 2016/2017 - Explorations in Quantum Gravity (Dupuis) -
PSI 2016/2017 - Relativity (Turok)
PSI 2016/2017 - Relativity (Turok) -
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Quantum Information in Quantum Gravity II
Quantum Information in Quantum Gravity II -
Probing Quantum Features of Gravity in Tabletop Regime and Reassessing the I.I.D. Assumption in Quantum Probability Assignments
Linqing Chen Austrian Academy of Sciences
Recent advancements in tabletop experiments may offer the first empirical proof that gravity is not classical. In the first part of my talk, I will present two effects that overcome the current limitations of Newton potential phenomenology, involving generic quantum sources of gravity. These effects are derived using a field-basis formulation of linearised gravity, which is particularly suited for describing superposition of macroscopically distinct gravitational field configurations in the low energy regime. This formalism also offers a natural setting for exploring the gauge symmetries. In particular, I will discuss the construction of linearised quantum diffeomorphism transformations by extending the notion of quantum reference frames to quantum fields. -
Flatness and spikes in Ponzano-Regge
The original spinfoam amplitude, Ponzano-Regge, has two properties in seeming contradiction: (1.) It can be written as an integral of a product of Dirac delta functions imposing that holonomies be exactly flat, and (2.) In its original sum-over-spins form, its leading order large spin asymptotics consist in Regge calculus, modified to include an additional local discrete orientation variable for each tetrahedron, which, when fixed inhomogeneously, leads to critical point equations for the edge lengths which do not necessarily imply flatness, but allow spikes. Of course, this apparent contradiction between flatness and spikes appears only for triangulations with bubbles, for which both of these formulations of the model are divergent and ill-defined anyway, and this may be the resolution of the paradox. However, we explore the possibility of another resolution of this paradox which may also have relevance for the semiclassical regime of 4D spinfoams, in which a similar sum over local orientations appears.
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Quantum Gravity and Effective Topology
Renate Loll Radboud Universiteit Nijmegen
My presentation will introduce a new methodology to characterize properties of quantum spacetime in a strongly quantum-fluctuating regime, using tools from topological data analysis. Starting from a microscopic quantum geometry, generated nonperturbatively in terms of dynamical triangulations (DT), we compute the homology of a sequence of coarse-grained versions of the geometry as a function of the coarse-graining scale. This gives rise to a characteristic "topological finger print" of the quantum geometry. I discuss the results for Lorentzian and Euclidean 2D quantum gravity, defined via lattice quantum gravity based on causal and Euclidean DT. For the latter, our numerical analysis reproduces the well-known string susceptibility exponent governing the scaling behaviour of the partition function. [Joint work with Jesse van der Duin, Marc Schiffer and Agustin Silva, to appear.]