Format results

Talk


10 years of the quantum SWITCH: state of the art and new perspectives
Giulio Chiribella The University of Hong Kong (HKU)

Cyclic quantum causal models and violations of causal inequalities
Ognyan Oreshkov Université Libre de Bruxelles

TBA
Laura Henderson University of Waterloo

Composing causal orderings
Aleks Kissinger University of Oxford

Quantum principle of relativity
Andrzej Dragan University of Warsaw


What happens when we quantize time?
Alexander Smith Dartmouth College


Talk

The Cohomology of Groups (JohnsonFreyd/Guo)  Lecture 11

Theo JohnsonFreyd Dalhousie University

Meng Guo University of Illinois UrbanaChampaign


The Cohomology of Groups (JohnsonFreyd/Guo)  Lecture 10

Meng Guo University of Illinois UrbanaChampaign

Theo JohnsonFreyd Dalhousie University


The Cohomology of Groups (JohnsonFreyd/Guo)  Lecture 9

Meng Guo University of Illinois UrbanaChampaign

Theo JohnsonFreyd Dalhousie University


The Cohomology of Groups (JohnsonFreyd/Guo)  Lecture 8

Meng Guo University of Illinois UrbanaChampaign

Theo JohnsonFreyd Dalhousie University


The Cohomology of Groups (JohnsonFreyd/Guo)  Lecture 7

Meng Guo University of Illinois UrbanaChampaign

Theo JohnsonFreyd Dalhousie University


The Cohomology of Groups (JohnsonFreyd/Guo)  Lecture 6

Meng Guo University of Illinois UrbanaChampaign

Theo JohnsonFreyd Dalhousie University


The Cohomology of Groups (JohnsonFreyd/Guo)  Lecture 5

Meng Guo University of Illinois UrbanaChampaign

Theo JohnsonFreyd Dalhousie University


The Cohomology of Groups (JohnsonFreyd/Guo)  Lecture 4

Meng Guo University of Illinois UrbanaChampaign

Theo JohnsonFreyd Dalhousie University



Talk

General Relativity for Cosmology  Lecture 24
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 23
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 22
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 21
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 20
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 19
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 18
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 17
Achim Kempf University of Waterloo


Talk

Symmetry, topology, and thermal stability
Stephen Bartlett University of Sydney

Symmetryprotected topologically ordered phases for measurementbased quantum computation
Akimasa Miyake University of New Mexico

A resource theory of nonclassicality in Bell scenarios
Robert Spekkens Perimeter Institute for Theoretical Physics

Variational Quantum Eigensolvers and contextuality
Peter Love Tufts University

Magic resource theories and classical simulation
Earl Campbell University of Sheffield

Classical algorithms for quantum mean values
David Gosset Institute for Quantum Computing (IQC)

Finegrained quantum supremacy and stabilizer rank
Tomoyuki Morimae Kyoto University

Towards local testability for quantum coding
Anthony Leverrier Centre Inria de Paris (INRIA)


Talk


Talk

PSI 2019/2020  Condensed Matter (Wang)  Lecture 16
Lauren Hayward Perimeter Institute for Theoretical Physics

PSI 2019/2020  Condensed Matter (Wang)  Lecture 15
Chong Wang Perimeter Institute for Theoretical Physics

PSI 2019/2020  Condensed Matter (Wang)  Lecture 14
Chong Wang Perimeter Institute for Theoretical Physics

PSI 2019/2020  Condensed Matter (Wang)  Lecture 13
Chong Wang Perimeter Institute for Theoretical Physics

PSI 2019/2020  Condensed Matter (Wang)  Lecture 12
Chong Wang Perimeter Institute for Theoretical Physics

PSI 2019/2020  Condensed Matter (Wang)  Lecture 11
Chong Wang Perimeter Institute for Theoretical Physics

PSI 2019/2020  Condensed Matter (Wang)  Lecture 10
Chong Wang Perimeter Institute for Theoretical Physics

PSI 2019/2020  Condensed Matter (Wang)  Lecture 9
Chong Wang Perimeter Institute for Theoretical Physics


Talk

Welcome and Opening Remarks
Bianca Dittrich Perimeter Institute for Theoretical Physics

Quantum Spacetime from Lattice Gravity à la CDT
Renate Loll Radboud Universiteit Nijmegen

How complement maps can cure divergences
Sylvie Paycha Universität Potsdam

The gravitational Wilson loop and the nonAbelian Stokes' theorem
Reiko Toriumi Okinawa Institute of Science and Technology (OIST)

The dynamics of difference
Lee Smolin Perimeter Institute for Theoretical Physics


Probing fundamental physics with gravitational waves
Cecilia Chirenti Universidade Federal do ABC

Implications of the Quantum Nature Spacetime for the Big Bang and Black Holes
Abhay Ashtekar Pennsylvania State University


Talk


Introduction to Everpresent Lambda
Rafael Sorkin Perimeter Institute for Theoretical Physics

Status of Hubble tension in Cosmology
Niayesh Afshordi University of Waterloo

Causal Set Action/Entropy
Yasaman Kouchekzadeh Yazdi Imperial College London

Observational constraints on modified gravity and dark energy
Jian Li Simon Fraser University (SFU)

Supplementary considerations on Everpresent Lambda
Rafael Sorkin Perimeter Institute for Theoretical Physics


Implementing a stochastic dark energy framework into CAMB
Levon Pogosian Simon Fraser University (SFU)


Talk

PSI 2019/2020  Statistical Mechanics (Vieira)  Lecture 14
Pedro Vieira Perimeter Institute for Theoretical Physics

PSI 2019/2020  Statistical Mechanics (Vieira)  Lecture 13
Pedro Vieira Perimeter Institute for Theoretical Physics

PSI 2019/2020  Statistical Mechanics (Vieira)  Lecture 12
Pedro Vieira Perimeter Institute for Theoretical Physics

PSI 2019/2020  Statistical Mechanics (Vieira)  Lecture 11
Pedro Vieira Perimeter Institute for Theoretical Physics

PSI 2019/2020  Statistical Mechanics (Vieira)  Lecture 10
Pedro Vieira Perimeter Institute for Theoretical Physics

PSI 2019/2020  Statistical Mechanics (Vieira)  Lecture 9
Pedro Vieira Perimeter Institute for Theoretical Physics

PSI 2019/2020  Statistical Mechanics (Vieira)  Lecture 8
Pedro Vieira Perimeter Institute for Theoretical Physics

PSI 2019/2020  Statistical Mechanics (Vieira)  Lecture 7
Pedro Vieira Perimeter Institute for Theoretical Physics


Talk


Talk

PSI 2019/2020  Relativity (Kubiznak)  Lecture 15
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 14
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 13
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 12
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 11
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 10
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 9
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 8
David Kubiznak Charles University


Talk

PSI 2019/2020  Quantum Theory (Dupuis)  Lecture 14
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2019/2020  Quantum Theory (Dupuis)  Lecture 13
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2019/2020  Quantum Theory (Dupuis)  Lecture 12
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2019/2020  Quantum Theory (Dupuis)  Lecture 11
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2019/2020  Quantum Theory (Dupuis)  Lecture 10
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2019/2020  Quantum Theory (Dupuis)  Lecture 9
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2019/2020  Quantum Theory (Dupuis)  Lecture 8
Maïté Dupuis Perimeter Institute for Theoretical Physics



Indefinite Causal Structure
There has been a surge of interest in indefinite causal structure the idea that cause and effect can no longer be sharply distinguished. Motivated both by experimentation with quantum switches and quantum gravity there can be situations in which there is no matterofthefact as to what the causal structure of spacetime is. This meeting will bring together workers in Quantum Foundations and Quantum Gravity in both theoretical experimental physics to discuss the state of the art of current research and set new directions for this emerging subdiscipline.

The Cohomology of Groups (JohnsonFreyd/Guo)
The Cohomology of Groups (JohnsonFreyd/Guo) 
General Relativity for Cosmology (Kempf)
General Relativity for Cosmology (Kempf) 
Symmetry, Phases of Matter, and Resources in Quantum Computing
Our conference covers three related subjects: quantum faulttolerance magic states and resource theories and quantum computational phases of matter. The linking elements between them are (a) on the phenomenological side the persistence of computational power under perturbations and (b) on the theory side symmetry. The latter is necessary for the working of all three. The subjects are close but not identical and we expect crossfertilization between them.Fault tolerance is an essential component of universal scalable quantum computing.However known practical methods of achieving fault tolerance are extremely resource intensive. Distillation of magic states is in the current paradigm of faulttolerance the costliest operational component by a large margin. It is therefore pertinent to improve the efficiency of such procedures study theoretical limits of efficiency and more generally to establish a resource theory of quantum state magic. During the workshop we will focus on a fundamental connection between faulttolerant protocols and symmetries.``Computational phases of matters are a surprising link between quantum computation and condensed matter physics. Namely in the presence of suitable symmetries the ground states of spin Hamiltonians have computational power within the scheme of measurementbased quantum computation and this power is uniform across physical phases. Several computationally universal phases have to date been discovered. This subject is distinct from the above but linked to them by the feature of persistence of computational power under deformations and deviations.

PSI 2019/2020  Quantum Field Theory II (David)
PSI 2019/2020  Quantum Field Theory II (David) 
PSI 2019/2020  Condensed Matter (Wang)
PSI 2019/2020  Condensed Matter (Wang) 
Emmy Noether Workshop: The Structure of Quantum Space Time
Understanding 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.

Everpresent Lambda: Theory Meets Observations
One of the biggest mysteries in cosmology and fundamental physics is the nature of dark energy that is responsible for the current acceleration of cosmic expansion. While a cosmological constant provides the simplest model of dark energy recent observational tensions amongst supernovae Ia gravitational lensing time delays and cosmic microwave background suggest the need for a more complex dynamical dark energy. One of the oldest proposals for a dynamical dark energy is Everpresent Lambda proposed by Sorkin which is inspired by the causal set model of quantum gravity. It was recently shown that this model can potentially resolve the tensions in cosmological observations. The meeting aims to bring together a small number of experts in quantum gravity causal sets and cosmology to carefully examine the models theoretical predictions and its observational tests and pave the way for what might be an(other) exciting insight from cosmology into the fundamental nature of spacetime.

PSI 2019/2020  Statistical Mechanics (Vieira)
PSI 2019/2020  Statistical Mechanics (Vieira) 
PSI 2019/2020  Quantum Field Theory (Wohns/Xu)
PSI 2019/2020  Quantum Field Theory (Wohns/Xu) 
PSI 2019/2020  Relativity (Kubiznak)
PSI 2019/2020  Relativity (Kubiznak) 
PSI 2019/2020  Quantum Theory (Branczyk/Dupuis)
PSI 2019/2020  Quantum Theory (Branczyk/Dupuis)