Format results

Talk

Welcome and Opening Remarks
Bianca Dittrich Perimeter Institute for Theoretical Physics

Approaches to Quantum Gravity: Key Achievements and Open Issues
Hermann Nicolai MaxPlanckInstitut für Gravitationsphysik

Quantum gravity from the loop perspective
Alejandro Perez Centre de Physique Théorique

Lessons for quantum gravity from quantum information theory
Daniel Harlow Massachusetts Institute of Technology (MIT)

Understanding of QG from string theory
Herman Verlinde Princeton University

Progress in horizon thermodynamics
Aron Wall University of Cambridge

Asymptotically Safe Amplitudes from the Quantum Effective Action
Frank Saueressig Radboud Universiteit Nijmegen

The Remarkable Roundness of the Quantum Universe
Renate Loll Radboud Universiteit Nijmegen


Talk

PSI 2019/2020  Relativistic Quantum Information Part 1  Lecture 4
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2019/2020  Relativistic Quantum Information Part 1  Lecture 3
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2019/2020  Relativistic Quantum Information Part 1  Lecture 2
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2019/2020  Relativistic Quantum Information Part 1  Lecture 1
Eduardo MartinMartinez Institute for Quantum Computing (IQC)


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

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

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



Talk

Symmetries and Dualities of Abelian TQFTs
Jaume Gomis Perimeter Institute for Theoretical Physics

TBD
Leonardo Rastelli Stony Brook University

Universality at large transverse spin in defect CFTs
Madalena Lemos European Organization for Nuclear Research (CERN)

Domain Walls in SuperQCD
Francesco Benini SISSA International School for Advanced Studies

Weyl Anomaly Induced Current and Holography
RongXin Miao Sun YatSen University

Wilson line impurities, flows and entanglement entropy
Prem Kumar Swansea University

Anomalies in the Space of Coupling Constants
Nathan Seiberg Institute for Advanced Study (IAS)



Talk

Deep learning for quantum manybody physics or: Toolmaking beyond the papyrus complexity
Giuseppe Carleo ETH Zurich  Institut für Theoretische Physik

Simulating Thermal and Quantum Fluctuations in Materials and Molecules
Michele Ceriotti L'Ecole Polytechnique Federale de Lausanne (EPFL)

How to use a Gaussian Boson Sampler to learn from graphstructured data
Maria Schuld University of KwaZuluNatal

Machine learning meets quantum physics
DongLing Deng Tsinghua University


Engineering Programmable Spin Interactions in a NearConcentric Cavity
Emily Davis Stanford University

Alleviating the sign structure of quantum states
Giacomo Torlai Flatiron Institute

Navigating the quantum computing field as a high school student
Tanisha Bassan The Knowledge Society


Talk

PSI 2018/2019  Explorations in Quantum Information  Lecture 13
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2018/2019  Explorations in Quantum Information  Lecture 12
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2018/2019  Explorations in Quantum Information  Lecture 11
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2018/2019  Explorations in Quantum Information  Lecture 10
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2018/2019  Explorations in Quantum Information  Lecture 9
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2018/2019  Explorations in Quantum Information  Lecture 8
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2018/2019  Explorations in Quantum Information  Lecture 7
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

PSI 2018/2019  Explorations in Quantum Information  Lecture 6
Eduardo MartinMartinez Institute for Quantum Computing (IQC)


Talk

PSI 2018/2019  Quantum Information Review  Lecture 15
Daniel Gottesman University of Maryland, College Park

PSI 2018/2019  Quantum Information Review  Lecture 14
Daniel Gottesman University of Maryland, College Park

PSI 2018/2019  Quantum Information Review  Lecture 13
Daniel Gottesman University of Maryland, College Park

PSI 2018/2019  Quantum Information Review  Lecture 12
Daniel Gottesman University of Maryland, College Park

PSI 2018/2019  Quantum Information Review  Lecture 11
Daniel Gottesman University of Maryland, College Park

PSI 2018/2019  Quantum Information Review  Lecture 10
Daniel Gottesman University of Maryland, College Park

PSI 2018/2019  Quantum Information Review  Lecture 9
Daniel Gottesman University of Maryland, College Park

PSI 2018/2019  Quantum Information Review  Lecture 8
Daniel Gottesman University of Maryland, College Park


Talk

Welcome and Opening Remarks
Lucien Hardy Perimeter Institute for Theoretical Physics



Local quantum operations and causality
Robert Oeckl Universidad Nacional Autónoma De Mexico (UNAM)

Towards synthetic Euclidean quantum field theory
Tobias Fritz Universität Innsbruck

Almost quantum correlations violate the norestriction hypothesis
Ana Belen Sainz Gdańsk University of Technology

A deviceindependent approach to testing physical theories from finite data
YeongCherng Liang National Cheng Kung University



Talk


Quantum speedup in testing causal hypotheses
Giulio Chiribella The University of Hong Kong (HKU)

The Logic of Physical Law
Stefan Wolf Universit della Svizzera italiana


On the concepts of universality in physics and computer science
Gemma De Las Cuevas Universität Innsbruck

A nogo theorem for observerindependent facts
Časlav Brukner Vienna Center for Quantum Science and Technology


Algorithmic information theory: a critical perspective
Tom Sterkenburg LudwigMaximiliansUniversitiät München (LMU)


Talk


Compatibility of implicit and explicit observers in quantum theory and beyond
Thomas Galley Institute for Quantum Optics and Quantum Information (IQOQI)  Vienna

From observers to physics via algorithmic information theory I
Markus Müller Institute for Quantum Optics and Quantum Information (IQOQI)  Vienna

From observers to physics via algorithmic information theory II
Markus Müller Institute for Quantum Optics and Quantum Information (IQOQI)  Vienna

Motility of the internalexternal cut as a foundational principle
Robert Spekkens Perimeter Institute for Theoretical Physics

Representing transformations
Joel Wallman Institute for Quantum Computing (IQC)

Quantum theory cannot consistently describe the use of itself
Renato Renner ETH Zurich  Institut für Theoretische Physik



PSI 2019/2020  Relativistic Quantum Information Part 1
PSI 2019/2020  Relativistic Quantum Information Part 1 
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.

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 Theory (Branczyk/Dupuis)
PSI 2019/2020  Quantum Theory (Branczyk/Dupuis) 
Boundaries and Defects in Quantum Field Theory
Boundaries 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.

Machine Learning for Quantum Design
Machine learning techniques are rapidly being adopted into the field of quantum manybody physics including condensed matter theory experiment and quantum information science. The steady increase in data being produced by highlycontrolled quantum experiments brings the potential of machine learning algorithms to the forefront of scientific advancement. Particularly exciting is the prospect of using machine learning for the discovery and design of quantum materials devices and computers. In order to make progress the field must address a number of fundamental questions related to the challenges of studying manybody quantum mechanics using classical computing algorithms and hardware. The goal of this conference is to bring together experts in computational physics machine learning and quantum information to make headway on a number of related topics including: Datadrive quantum state reconstruction Machine learning strategies for quantum error correction Neuralnetwork based wavefunctions Nearterm prospects for data from quantum devices Machine learning for quantum algorithm discovery Registration for this event is now closed

PSI 2018/2019  Explorations in Quantum Information (MartinMartinez)
PSI 2018/2019  Explorations in Quantum Information (MartinMartinez) 
PSI 2018/2019  Quantum Information Review (Gottesman)
PSI 2018/2019  Quantum Information Review (Gottesman) 
Foundations of Quantum Mechanics
The foundations of quantum mechanics have been revitalized in the past few decades by three developments: (i) the influence of quantum computation and quantum information theory (ii) studies of the interplay between quantum theory and relativity particularly the analysis of indefinite causal structure and (iii) proposals to reconstruct quantum theory from basic axioms. There have also been very interesting developments in understanding and classifying no=locality and contextuality using tools from sheaf theory and cohomology as well as operator algebras and category theory. The International Congress of Mathematical Physics is a natural forum for the discussion of these topics. In the past there have been satellite workshops on topics like Operator algebras and quantum statistical mechanics which also address fundamental issues. The modern study of quantum foundations is very much influenced and informed by mathematics: sheaf theory and cohomology category theory information theory convex analysis in addition to the continuing interest in operator algebras and functional analysis. The aim of the workshop is to bring together researchers who have made substantial contribution to the recent developments. The workshop will be held at Perimeter Institute over a five day period from July 30

Algorithmic Information, Induction and Observers in Physics
Our universe is of astonishing simplicity: almost all physical observations can in principle be described by a few theories that have short mathematical descriptions. But there is a field of computer science which quantifies simplicity namely algorithmic information theory (AIT). In this workshop we will discuss emerging connections between AIT and physics some of which have recently shown up in fields like quantum information theory and thermodynamics. In particular AIT and physics share one goal: namely to predict future observations given previous data. In fact there exists a gold standard of prediction in AIT called Solomonoff induction which is also applied in artificial intelligence. This motivates us to look at a broader question: what is the role of induction in physics? For example can quantum states be understood as Bayesian states of belief? Can physics be understood as a computation in some sense? What is the role of the observer i.e. the agent that is supposed to perform the predictions? These and related topics will be discussed by a diverse group of researchers from different disciplines.

Observers in Quantum and Foil Theories
Foil theories sometimes called mathematically rigorous science fiction describe ways the world could have been were it not quantum mechanical. Our understanding of quantum theory has been deepened by contrasting it with these alternatives. So far observers in foil theories have only been modeled implicitly for example via the recorded probabilities of observing events. Even when multiagent settings are considered these agents tend to be compatible in the classical sense that they could always compare their observations. Scenarios where agents and their memories are themselves modeled as physical systems within the theory (and could in particular measure each other as in Wigner's friend experiment) have not yet been considered. In this workshop we will investigate which foil theories allow for the existence of explicit observers and whether they allow for paradoxes in multiagent settings such as those found in quantum theory. We will also investigate which interpretations of quantum theory would equally well interpret the foil theories and which interpretations are truly quantum. We will gain a deeper understanding of how this can happen by discussing appropriate definitions observers in these theories and seeing how such observers learn about their environment.