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 worldleading 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 onedimensional 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


Supersymmetric Black Rings and Supertubes
David Mateos Institucio Catalana de Recerca I Estudis Avancats (ICREA)  Universitat de Barcelona

Octonions and the Standard Model
16 talksCollection Number C21001Talk

The standard model, left/right symmetry, and the "magic square"
Latham Boyle Perimeter Institute for Theoretical Physics

Discussion Session

Tejinder Singh Tata Institute for Fundamental Research

Shane Farnsworth Max Planck Institute for Gravitational Physics  Albert Einstein Institute (AEI)

Cohl Furey Humboldt University of Berlin


Jordan algebras: from QM to 5D supergravity to … Standard Model?
Paul Townsend University of Cambridge

Potentially realistic SO(10) GUTs and their phenomenology
Michal Malinsky Charles University

Spin(11,3), particles and octonions
Kirill Krasnov University of Nottingham

Can We Understand the Standard Model Using Octonions?
John Baez University of California

Can We Understand the Standard Model?
John Baez University of California

The Higher Algebra of Supersymmetry
John Huerta University of Lisbon


Tensor Networks: from Simulations to Holography III
21 talksCollection Number C20034Talk

Discussion Session 2
Bianca Dittrich Perimeter Institute for Theoretical Physics

An overview of Wavelets and MERA
Glen Evenbly Georgia Institute of Technology

Unconstrained tree tensor simulations for highdimensional quantum manybody simulations
Simone Montangero University of Padova  Department of Physics and Astronomy

Pathintegral Optimization and AdS/CFT
Tadashi Takayanagi Yukawa Institute for Theoretical Physics

A measurementbased variational quantum eigensolver
Luca Dellantonio University of Waterloo

Query complexity and cutoffs in AdS3/CFT2
Bartek Czech Tsinghua University


Dimensional Expressivity Analysis for Quantum Circuits
Tobias Hartung The Deutsches ElektronenSynchrotron (DESY)


PSI 2019/2020  ChernSimons Theory (Part 1)
13 talksCollection Number C20008Talk

PSI 2019/2020  ChernSimons Theory Part 1  Lecture 13
Kevin Costello Perimeter Institute for Theoretical Physics

PSI 2019/2020  ChernSimons Theory Part 1  Lecture 12
Kevin Costello Perimeter Institute for Theoretical Physics

PSI 2019/2020  ChernSimons Theory Part 1  Lecture 11
Kevin Costello Perimeter Institute for Theoretical Physics

PSI 2019/2020  ChernSimons Theory Part 1  Lecture 10
Kevin Costello Perimeter Institute for Theoretical Physics

PSI 2019/2020  ChernSimons Theory Part 1  Lecture 9
Kevin Costello Perimeter Institute for Theoretical Physics

PSI 2019/2020  ChernSimons Theory Part 1  Lecture 8
Kevin Costello Perimeter Institute for Theoretical Physics

PSI 2019/2020  ChernSimons Theory Part 1  Lecture 7
Kevin Costello Perimeter Institute for Theoretical Physics

PSI 2019/2020  ChernSimons Theory Part 1  Lecture 6
Kevin Costello Perimeter Institute for Theoretical Physics


Emmy Noether Workshop: The Structure of Quantum Space Time
25 talksCollection Number C19047Talk

Closing Remarks and GoodBye
Bianca Dittrich Perimeter Institute for Theoretical Physics

Towards inclusion of biology in cosmology
Marina Cortes Institute for Astrophysics and Space Sciences

Central extension and black hole entropy
Linqing Chen Okinawa Institute of Science and Technology (OIST)

Higher spin symmetry in gravity and string
Wei Li Chinese Academy of Sciences  Institute of Theoretical Physics

Evaporating Black Holes in AdS
Netta Engelhardt Massachusetts Institute of Technology (MIT)

How much geometry is in a truncated spectral triple?
Lisa Glaser Universität Wien

Spacetime Foam and the Cosmological Constant
Steve Carlip University of California

AdS/CFT and string sigmamodel nonperturbatively
Valentina Forini City, University of London


Boundaries and Defects in Quantum Field Theory
21 talksCollection Number C19035Talk

Quantum Work of an Optical Lattice and Boundary Field Theory
Natan Andrei Rutgers University

Colliders and conformal interfaces
Marco Meineri L'Ecole Polytechnique Federale de Lausanne (EPFL)

Entanglement negativity in manybody systems, and holography
Shinsei Ryu University of Illinois at UrbanaChampaign (UIUC)

Shape dependence of superconformal defects
Lorenzo Bianchi Queen Mary  University of London (QMUL)

Entanglement, free energy and Ctheorem in DCFT
Tatsuma Nishioka University of Tokyo

BPS Wilson loop in AdS4/CFT3
Silvia Penati University of MilanBicocca

Boundary correlators of Liouville and Toda theories on AdS2 and AdS/CFT
Arkady Tseytlin Imperial College London

Wilson loops and defect CFT
Simone Giombi Princeton University


Bootstrap 2019
10 talksCollection Number C19026Talk

Sphere partition functions and Hamiltonian truncation
Matthijs Hogervorst L'Ecole Polytechnique Federale de Lausanne (EPFL)

Anomalies and the Conformal Bootstrap
ShuHeng Shao Stony Brook University

Talk 24 via live stream
Petr Kravchuk Institute for Advanced Study (IAS)

Talk 21 via live stream

Walter Landry California Institute of Technology

David SimmonsDuffin Institute for Advanced Study (IAS)


Talk 15 via live stream
Martin Kruczenski Purdue University

Spinning Conformal Bootstrap in 4d
Denis Karteev L'Ecole Polytechnique Federale de Lausanne (EPFL)

Talk 13 via live stream
Carlo Meneghelli University of Oxford

Precision Islands for ABJM theory from Mixed Correlator Bootstrap
Shai Chester Weizmann Institute of Science Canada


Gauge Theory, Geometric Langlands and Vertex Operator Algebras
11 talksCollection Number C18004Talk







Introduction to local geometric Langlands
Sam Raskin University of Texas  Austin



Quantum Black Holes in the Sky?
34 talksCollection Number C17055Talk


What does a quantum black hole look like to the Event Horizon Telescope?
Avery Broderick University of Waterloo


LongLived Inverse Chirp Signals from CoreCollapse in Massive ScalarTensor Gravity
Ulrich Sperhake California Institute of Technology

Growing BlackHole Hair in Extensions of General Relativity
Helvi Witek University of Cambridge

Remarks on cosmic censorship and its possible violations
Roberto Emparan Institucio Catalana de Recerca I Estudis Avancats (ICREA)  Universitat de Barcelona


Qubit Model for Black Hole Evaporation without Firewalls
Don Page University of Alberta


It from Qubit Summer School
62 talksCollection Number C16003Talk

Toy Holography
Daniel Harlow Massachusetts Institute of Technology (MIT)

Quantum Gravity and Quantum Chaos
Stephen Shenker Stanford University

Modular hamiltonians in 2d CFT
John Cardy University of California

Why physicists should care about the complexity zoo
Adam Buland Massachusetts Institute of Technology

Eigenstate Thermalization Hypothesis
Markus Müller Institute for Quantum Optics and Quantum Information (IQOQI)  Vienna

Tensor Network Holography

Vijay Balasubramanian University of Pennsylvania

Xiaoliang Qi Stanford University

Brian Swingle University of Maryland  College Park


Black Hole Information Paradox  2
Daniel Harlow Massachusetts Institute of Technology (MIT)

Quantum NP and the Complexity of Ground States
Dorit Aharonov Hebrew University of Jerusalem


Quantum Information in Quantum Gravity II
30 talksCollection Number C15041Talk

The Complexity and (Un)Computability of Quantum Phase Transitions
James Watson University of Maryland

Introduction to Quantinuum and TKET
Mark Jackson University of Leiden

Quantum simulation of Z2 lattice gauge theory with dynamical matter
Fabian Grusdt LudwigMaximiliansUniversitiät München (LMU)

NLTS Hamiltonians from good quantum codes
Anurag Anshu Harvard University

Positivity, negativity, entanglement, and holography
Mukund Rangamani Durham University  Department of Mathematical Sciences

3D Holography: from discretum to continuum
Bianca Dittrich Perimeter Institute for Theoretical Physics

Quantum Fisher metric in field theory and gravity
Nima Lashkari McGill University

Wormholes and Complexity
Adam Brown Stanford University



Supersymmetric Black Rings and Supertubes
David Mateos Institucio Catalana de Recerca I Estudis Avancats (ICREA)  Universitat de Barcelona

Octonions and the Standard Model
16 talksCollection 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 hourlong talk every Monday at noon (EST), with the first talk on Monday February 8, and the final talk on Monday May 17.

Tensor Networks: from Simulations to Holography III
21 talksCollection Number C20034 
PSI 2019/2020  ChernSimons Theory (Part 1)
13 talksCollection Number C20008PSI 2019/2020  ChernSimons Theory (Part 1) 
Emmy Noether Workshop: The Structure of Quantum Space Time
25 talksCollection Number C19047Understanding the smallscale 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.

Boundaries and Defects in Quantum Field Theory
21 talksCollection 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 ctheorems 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.

Bootstrap 2019
10 talksCollection 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 nonperturbative 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.

Gauge Theory, Geometric Langlands and Vertex Operator Algebras
11 talksCollection Number C18004The workshop will explore the relation between boundary conditions in fourdimensional gauge theory the Geometric Langlands program and Vertex Operator Algebras.

Quantum Black Holes in the Sky?
34 talksCollection Number C17055The past decade has witnessed significant breakthroughs in understanding the quantum nature of black holes, with insights coming from quantum information theory, numerical relativity, and string theory. At the same time, astrophysical and gravitational wave observations can now provide an unprecedented window into the phenomenology of black hole horizons. This workshop seeks to bring together leading experts in these fields to explore new theoretical and observational opportunities and synergies that could improve our physical understanding of quantum black holes.


Quantum Information in Quantum Gravity II
30 talksCollection Number C15041Quantum Information in Quantum Gravity II