Quantum field theory was originally developed as the extension of quantum mechanics needed to accommodate the principles of special relativity. Today quantum field theory is the modern paradigm with which we understand particle physics, condensed matter systems, and many aspects of early universe cosmology, and it is used to describe the interactions of elementary particles, the dynamics of many body systems and critical phenomena, all with exquisite accuracy. Currently, Perimeter researchers are producing world-leading advances in the study of integrability and scattering amplitudes in quantum field theories. String theory is a theoretical framework which was proposed to produce a unified description of all particles and forces in nature, including gravity. It is based on the idea that at very short distances, all particles should in fact be seen to be extended one-dimensional objects, i.e., ‘strings.’ Modern string theory has grown to be a broad and varied field of research with strong connections to quantum gravity, particle physics and cosmology, as well as mathematics. An exciting new framework known as ‘holography’ has emerged from string theory whereby quantum gravity is formulated in terms of quantum field theory in one less dimension. This symbiosis between quantum field theory and quantum gravity has been a focus of many Perimeter researchers. This has led to the development of exciting new methods to study the quantum dynamics of gauge theories and in the application of these techniques to new domains, such as nuclear physics and condensed matter physics
Format results
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16 talks-Collection Number C21001
Talk
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Welcome and Opening Remarks
Kirill Krasnov University of Nottingham
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Finite quantum geometry, octonions and the theory of fundamental particles.
Michel Dubois-Violette University of Paris-Saclay
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Supersymmetry and RCHO revisited
Paul Townsend University of Cambridge
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Spin (8,9,10), Octonions and the Standard Model
Kirill Krasnov University of Nottingham
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Gravity as the square of gauge theory
Leron Borsten Heriot-Watt University
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A Magic Pyramid of Supergravity Theories from Yang-Mills Squared
Mia Hughes Imperial College London
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Division algebraic symmetry breaking
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Cohl Furey Humboldt University of Berlin
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Mia Hughes Imperial College London
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Clifford algebra of the Standard Model
Ivan Todorov Bulgarian Academy of Sciences
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Tensor Networks: from Simulations to Holography III
21 talks-Collection Number C20034Talk
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Tensor networks for LGT: beyond 1D
Mari-Carmen Banuls Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)
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Tensor networks for critical systems
Frank Verstraete Ghent University
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Tensor network models of AdS/qCFT
Jens Eisert Freie Universität Berlin
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Quantum Cellular Automata, Tensor Networks, and Area Laws
Ignacio Cirac Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)
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Fun with replicas and holographic tensor networks
Michael Walter University of Amsterdam
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A tensor-network approach to fixed-point models of topological phases
Andreas Bauer Freie Universität Berlin
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Custom Fermionic Codes for Quantum Simulation
Riley Chien Dartmouth College
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PSI 2019/2020 - Chern-Simons Theory (Part 1)
13 talks-Collection Number C20008Talk
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PSI 2019/2020 - Chern-Simons Theory Part 1 - Lecture 1
Kevin Costello Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Chern-Simons Theory Part 1 - Lecture 2
Kevin Costello Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Chern-Simons Theory Part 1 - Lecture 3
Kevin Costello Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Chern-Simons Theory Part 1 - Lecture 4
Kevin Costello Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Chern-Simons Theory Part 1 - Lecture 5
Kevin Costello Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Chern-Simons Theory Part 1 - Lecture 6
Kevin Costello Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Chern-Simons Theory Part 1 - Lecture 7
Kevin Costello Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Chern-Simons Theory Part 1 - Lecture 8
Kevin Costello Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - QFT III
14 talks-Collection Number C20006Talk
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PSI 2019/2020 - QFT III - Lecture 7
Jaume Gomis Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - QFT III - Lecture 8
Jaume Gomis Perimeter Institute for Theoretical Physics
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Emmy Noether Workshop: The Structure of Quantum Space Time
25 talks-Collection Number C19047Talk
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Welcome and Opening Remarks
Bianca Dittrich Perimeter Institute for Theoretical Physics
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Quantum Spacetime from Lattice Gravity à la CDT
Renate Loll Radboud Universiteit Nijmegen
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How complement maps can cure divergences
Sylvie Paycha University of Potsdam
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The gravitational Wilson loop and the non-Abelian Stokes' theorem
Reiko Toriumi Okinawa Institute of Science and Technology Graduate University
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The dynamics of difference
Lee Smolin Perimeter Institute for Theoretical Physics
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Probing fundamental physics with gravitational waves
Cecilia Chirenti Universidade Federal do ABC
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Implications of the Quantum Nature Space-time for the Big Bang and Black Holes
Abhay Ashtekar Pennsylvania State University
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PSI 2019/2020 - Quantum Field Theory II (David)
16 talks-Collection Number C19042Talk
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PSI 2019/2020 - Quantum Field Theory (Wohns/Xu)
14 talks-Collection Number C19040Talk
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PSI 2019/2020 - Statistical Mechanics (Vieira)
14 talks-Collection Number C19041Talk
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PSI 2019/2020 - Statistical Mechanics (Vieira)
Pedro Vieira Perimeter Institute for Theoretical Physics
PIRSA:19090119 -
PSI 2019/2020 - Statistical Mechanics (Vieira) - Lecture 2
Pedro Vieira Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Statistical Mechanics (Vieira) - Lecture 3
Pedro Vieira Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Statistical Mechanics (Vieira) - Lecture 4
Pedro Vieira Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Statistical Mechanics (Vieira) - Lecture 5
Pedro Vieira Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Statistical Mechanics (Vieira) - Lecture 6
Pedro Vieira Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Statistical Mechanics (Vieira) - Lecture 7
Pedro Vieira Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Statistical Mechanics (Vieira) - Lecture 8
Pedro Vieira Perimeter Institute for Theoretical Physics
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Boundaries and Defects in Quantum Field Theory
21 talks-Collection Number C19035Talk
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Symmetries and Dualities of Abelian TQFTs
Jaume Gomis Perimeter Institute for Theoretical Physics
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TBD
Leonardo Rastelli Stony Brook University
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Universality at large transverse spin in defect CFTs
Madalena Lemos European Organization for Nuclear Research (CERN)
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Domain Walls in Super-QCD
Francesco Benini SISSA International School for Advanced Studies
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Weyl Anomaly Induced Current and Holography
Rong-Xin Miao Sun Yat-Sen University
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Wilson line impurities, flows and entanglement entropy
Prem Kumar Swansea University
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Anomalies in the Space of Coupling Constants
Nathan Seiberg Institute for Advanced Study (IAS)
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Bootstrap 2019
11 talks-Collection Number C19026Talk
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CFT amplitudes
Marc Gillioz SISSA International School for Advanced Studies
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Flux Tube S-matrix Bootstrap
Andrea Guerrieri Perimeter Institute for Theoretical Physics
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Precision Islands for ABJM theory from Mixed Correlator Bootstrap
Shai Chester Weizmann Institute of Science Canada
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Talk 13 via live stream
Carlo Meneghelli University of Oxford
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Spinning Conformal Bootstrap in 4d
Denis Karteev L'Ecole Polytechnique Federale de Lausanne (EPFL)
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Talk 15 via live stream
Martin Kruczenski Purdue University
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Talk 21 via live stream
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Walter Landry California Institute of Technology
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David Simmons-Duffin Institute for Advanced Study (IAS)
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PSI 2018/2019 - String Theory Review (Gaiotto)
15 talks-Collection Number C19015Talk
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PSI 2018/2019 - String Theory Review - Lecture 1
Davide Gaiotto Perimeter Institute for Theoretical Physics
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PSI 2018/2019 - String Theory Review - Lecture 2
Davide Gaiotto Perimeter Institute for Theoretical Physics
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PSI 2018/2019 - String Theory Review - Lecture 3
Davide Gaiotto Perimeter Institute for Theoretical Physics
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PSI 2018/2019 - String Theory Review - Lecture 4
Davide Gaiotto Perimeter Institute for Theoretical Physics
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PSI 2018/2019 - String Theory Review - Lecture 5
Davide Gaiotto Perimeter Institute for Theoretical Physics
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PSI 2018/2019 - String Theory Review - Lecture 6
Davide Gaiotto Perimeter Institute for Theoretical Physics
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PSI 2018/2019 - String Theory Review - Lecture 7
Davide Gaiotto Perimeter Institute for Theoretical Physics
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PSI 2018/2019 - String Theory Review - Lecture 8
Davide Gaiotto Perimeter Institute for Theoretical Physics
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Gauge Theory, Geometric Langlands and Vertex Operator Algebras
11 talks-Collection Number C18004Talk
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Gauge Theory, Geometric Langlands, and All That
Edward Witten Institute for Advanced Study (IAS) - School of Natural Sciences (SNS)
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Overview of the global Langlands correspondence
Dima Arinkin University of Wisconsin-Milwaukee
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Gauge theory, vertex algebras and quantum Geometric Langland dualities
Davide Gaiotto Perimeter Institute for Theoretical Physics
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Introduction to local geometric Langlands
Sam Raskin The University of Texas at Austin
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Octonions and the Standard Model
16 talks-Collection Number C21001Over the years, various researchers have suggested connections between the octonions and the standard model of particle physics. The past few years, in particular, have been marked by an upsurge of activity on this subject, stimulated by the recent observation that the standard model gauge group and fermion representation can be elegantly characterized in terms of the octonions. This workshop, which will be the first ever on this topic, is intended to bring this new community together in an attempt to better understand these ideas, establish a common language, and stimulate further progress.
The workshop will consist of an hour-long talk every Monday at noon (EST), with the first talk on Monday February 8, and the final talk on Monday May 17.
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Tensor Networks: from Simulations to Holography III
21 talks-Collection Number C20034 -
PSI 2019/2020 - Chern-Simons Theory (Part 1)
13 talks-Collection Number C20008PSI 2019/2020 - Chern-Simons Theory (Part 1) -
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Emmy Noether Workshop: The Structure of Quantum Space Time
25 talks-Collection Number C19047Understanding the small-scale structure of spacetime is one of the biggest challenges faced by modern theoretical physics. There are many different attempts to solve this problem and they reflect the diversity of approaches to quantum gravity. This workshop will bring together researchers from a wide range of quantum gravity approaches and give them an opportunity to exchange ideas and gain new insights.
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PSI 2019/2020 - Quantum Field Theory II (David)
16 talks-Collection Number C19042PSI 2019/2020 - Quantum Field Theory II (David) -
PSI 2019/2020 - Quantum Field Theory (Wohns/Xu)
14 talks-Collection Number C19040PSI 2019/2020 - Quantum Field Theory (Wohns/Xu) -
PSI 2019/2020 - Statistical Mechanics (Vieira)
14 talks-Collection Number C19041PSI 2019/2020 - Statistical Mechanics (Vieira) -
Boundaries and Defects in Quantum Field Theory
21 talks-Collection Number C19035Boundaries and defects play central roles in quantum field theory (QFT) both as means to make contact with nature and as tools to constrain and understand QFT itself. Boundaries in QFT can be used to model impurities and also the finite extent of sample sizes while interfaces allow for different phases of matter to interact in a controllable way. More formally these structures shed light on the structure of QFT by providing new examples of dualities and renormalization group flows. Broadly speaking this meeting will focus on three areas: 1) formal and applied aspects of boundary and defect conformal field theory from anomalies and c-theorems to topological insulators 2) supersymmetry and duality from exact computations of new observables to the construction of new theories and 3) QFT in curved space and gravity from holographic computations of entanglement entropy to ideas in quantum information theory. Registration for this event is now open.
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Bootstrap 2019
11 talks-Collection Number C19026Quantum field theory (QFT) is a universal language for theoretical physics describing the Standard Model gravity early universe inflation and condensed matter phenomena such as phase transitions superconductors and quantum Hall fluids. A triumph of 20th century physics was to understand weakly coupled QFTs: theories whose interactions can be treated as small perturbations of otherwise freely moving particles. However weakly coupled QFTs represent a tiny island in an ocean of possibilities. They cannot capture many of the most interesting and important physical phenomena from the strong nuclear force to high temperature superconductivity.The critical challenge for the 21st century is to understand and solve strongly coupled QFTs. Meeting this challenge will require new physical insight new mathematics and new computational tools. Our collaboration combines deep knowledge of novel non-perturbative techniques with a concrete plan for attacking the problem of strong coupling. The starting point is the astonishing discovery that in numerous physical systems there is a unique quantum field theory consistent with general principles of symmetry and quantum mechanics. By analyzing the full implications of these general principles one can make sharp predictions for physical observables without resorting to approximations.This strategy is called the Bootstrap the topic of this three week program.
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PSI 2018/2019 - String Theory Review (Gaiotto)
15 talks-Collection Number C19015PSI 2018/2019 - String Theory Review (Gaiotto) -
Gauge Theory, Geometric Langlands and Vertex Operator Algebras
11 talks-Collection Number C18004The workshop will explore the relation between boundary conditions in four-dimensional gauge theory the Geometric Langlands program and Vertex Operator Algebras.