Format results

Talk


Tutorial: Causal Inference Meets Quantum Physics
Robert Spekkens Perimeter Institute for Theoretical Physics

Counterfactual and Graphical Frameworks for Causal Modeling
Thomas Richardson University of Washington



Talk

Lecture  Quantum Theory, PHYS 605
Dan Wohns Perimeter Institute for Theoretical Physics

Lecture  Quantum Theory, PHYS 605
Bindiya Arora Perimeter Institute for Theoretical Physics

Lecture  Quantum Theory, PHYS 605
Bindiya Arora Perimeter Institute for Theoretical Physics

Lecture  Quantum Theory, PHYS 605
Bindiya Arora Perimeter Institute for Theoretical Physics

Lecture  Quantum Theory, PHYS 605
Bindiya Arora Perimeter Institute for Theoretical Physics

Lecture  Quantum Theory, PHYS 605
Bindiya Arora Perimeter Institute for Theoretical Physics

Lecture  Quantum Theory, PHYS 605
Bindiya Arora Perimeter Institute for Theoretical Physics

Lecture  Quantum Theory, PHYS 605
Bindiya Arora Perimeter Institute for Theoretical Physics


Talk


Repetition Code Revisited
Matthew Fisher University of California, Santa Barbara


Stability of mixedstate quantum phases via finite Markov length
Shengqi Sang Stanford University

The rise and fall of mixedstate entanglement: measurement, feedback, and decoherence
TsungCheng Lu (Peter) University of Maryland, College Park

Universal bound on topological gap
Liang Fu Massachusetts Institute of Technology (MIT)  Department of Physics

Mapping ground states to stringnets
Daniel Ranard Massachusetts Institute of Technology (MIT)

Sequential Quantum Circuit
Xie Chen California Institute of Technology


Talk


Values for compiled XOR nonlocal games
Connor Paddock University of Ottawa

Reliable quantum computational advantages from quantum simulation
Juani Bermejo Vega University of Granada







Talk

GPTs and the probabilistic foundations of quantum theory  Lecture
Alexander Wilce Susquehanna University

GPTs and the probabilistic foundations of quantum theory  Lecture
Alexander Wilce Susquehanna University

GPTs and the probabilistic foundations of quantum theory  Lecture
Alexander Wilce Susquehanna University

GPTs and the probabilistic foundations of quantum theory  Lecture
Alexander Wilce Susquehanna University

GPTs and the probabilistic foundations of quantum theory  Lecture
Alexander Wilce Susquehanna University

GPTs and the probabilistic foundations of quantum theory  Lecture
Alexander Wilce Susquehanna University

GPTs and the probabilistic foundations of quantum theory  Lecture
Alexander Wilce Susquehanna University


Talk

Quantum Information Lecture
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Quantum Information Lecture
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Quantum Information Lecture
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Quantum Information Lecture
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Quantum Information Lecture
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Quantum Information Lecture
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Quantum Information Lecture
Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Quantum Information Lecture
Eduardo MartinMartinez Institute for Quantum Computing (IQC)


Talk

Quantum Foundations Lecture
Lucien Hardy Perimeter Institute for Theoretical Physics

Quantum Foundations Lecture
Lucien Hardy Perimeter Institute for Theoretical Physics

Quantum Foundations Lecture
Lucien Hardy Perimeter Institute for Theoretical Physics

Quantum Foundations Lecture
Lucien Hardy Perimeter Institute for Theoretical Physics

Quantum Foundations Lecture
Lucien Hardy Perimeter Institute for Theoretical Physics

Quantum Foundations Lecture
Lucien Hardy Perimeter Institute for Theoretical Physics

Quantum Foundations Lecture
Lucien Hardy Perimeter Institute for Theoretical Physics

Quantum Foundations Lecture
Lucien Hardy Perimeter Institute for Theoretical Physics


Talk


QPV: An Overview and Reflections
Harry Buhrman Centrum Wiskunde & Informatica

PopescuRohrlich correlations imply efficient instantaneous nonlocal quantum computation
Anne Broadbent University of Ottawa
PIRSA:23090023 
Nonlocal quantum computation meets quantum gravity
Alex May Perimeter Institute

Quantum ErrorCorrection and Holographic Task
Beni Yoshida Perimeter Institute for Theoretical Physics


Protocols and Implementations of Quantum Position Verification

Eric Chitambar University of Illinois UrbanaChampaign

Paul Kwiat University of Illinois




Talk

Welcome and Opening Remarks
Elie Wolfe Perimeter Institute for Theoretical Physics

Tutorial 1
Robert Spekkens Perimeter Institute for Theoretical Physics

Graphical models: fundamentals, origins, and beyond
Steffen Lauritzen University of Copenhagen

Towards standard imsets for maximal ancestral graphs
Robin Evans University of Oxford


Correlations from joint measurements in boxworld and applications to information processing
Mirjam Weilenmann Institute for Quantum Optics and Quantum Information (IQOQI)  Vienna
PIRSA:23040107 
Observational Equivalences Between Causal Structures with Latent Variables
Marina Maciel Ansanelli Perimeter Institute for Theoretical Physics



Talk

Quantum adiabatic speedup on a class of combinatorial optimization problems

Madelyn Cain Harvard University
 Madelyn Cain


Towards an artificial Muse for new ideas in Quantum Physics
Mario Krenn Max Planck Institute for the Science of Light


SelfCorrecting Quantum ManyBody Control using Reinforcement Learning with Tensor Networks
Friederike Metz L'Ecole Polytechnique Federale de Lausanne (EPFL)

A Study of Neural Network Field Theories
Anindita Maiti Perimeter Institute for Theoretical Physics


Representing quantum states with spiking neural networks

Stefanie Czischek University of Ottawa
 Stefanie Czischek


Adaptive Quantum State Tomography with Active Learning
Hannah Lange LudwigMaximiliansUniversität München (LMU)


Talk

Introduction & Welcoming Remarks
James Shaffer Quantum Valley Ideas Laboratories

Perimeter Greeting
Paul Smith Perimeter Institute for Theoretical Physics


Indirect spinspin interactions with Rydberg molecules
Hossein Sadeghpour Harvard University



Polyatomic ultralong range Rydberg molecules
Rosario GonzalezFerez University of Granada

Observation of linewidth narrowing in EIT polarization spectroscopy involving hot Rydberg atoms with Laguerre Gaussian modes
Luis Marcassa Universidade Estadual Paulista (UNESP)


Talk

Quantum Information 2021/2022

Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Philippe Allard Guerin Royal Military College SaintJean
PIRSA:22030081 

Quantum Information 2021/2022

Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Philippe Allard Guerin Royal Military College SaintJean
PIRSA:22030080 

Quantum Information 2021/2022

Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Philippe Allard Guerin Royal Military College SaintJean
PIRSA:22030079 

Quantum Information 2021/2022

Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Philippe Allard Guerin Royal Military College SaintJean
PIRSA:22030078 

Quantum Information 2021/2022

Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Philippe Allard Guerin Royal Military College SaintJean
PIRSA:22030077 

Quantum Information 2021/2022

Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Philippe Allard Guerin Royal Military College SaintJean
PIRSA:22030076 

Quantum Information 2021/2022

Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Philippe Allard Guerin Royal Military College SaintJean
PIRSA:22030075 

Quantum Information 2021/2022

Eduardo MartinMartinez Institute for Quantum Computing (IQC)

Philippe Allard Guerin Royal Military College SaintJean
PIRSA:22030074 


Causalworlds
Understanding causality is fundamental to science and inspires wideranging applications, yet there are several distinct notions of causation. Recently, there have been important developments on the role of causality in quantum physics, relativistic physics and their interplay. These have unearthed a plethora of fascinating open questions regarding the nature of causation, emergence of spacetime structure and the limits of quantum information processing. At the same time, causal reasoning has become an important tool in machine learning and statistics, with applications ranging from big data to healthcare. This conference brings together experts from different areas of physics working on questions related to causality, as well as selected researchers who bridge the gap between fundamental research and current industrial applications. The aim of the conference is to provide a venue for crosspollination of these ideas through scientific exchange between these communities. The conference will focus on the following facets of causality:
• Quantum and classical causal inference
• Indefinite causal order and quantum reference frames
• Causality in quantum field theory and quantum gravity
• Experiments and applications of causality
:: :: ::
Important dates
Paper submission deadline: 24 May 2024 // 31 May 2024
Paper notification: 3 July 2024 Registration deadline (with application for financial assistance): 18 July 2024
Registration deadline: 28 August 2024
Conference: 1620 September 2024 Update: The submission deadline has been extended to 31st May 2024 for
papers which clearly justify their relevance for the following three
topics: 1) classical causal inference, 2) causality in relativistic physics (including quantum field theory and quantum gravity) and 3) experiments in causality. As we have received a sufficiently high number of submissions on the remaining topics (particularly indefinite causality and quantum causal models), the original deadline of 24th May still holds for submissions in this category. :: :: ::
Call for Abstracts
Prospective speakers can submit a paper for a contributed talk (in person or online) and/or a poster (in person only) via the Call for Abstracts. The Call for Abstracts is now open! Submissions for a talk will automatically be considered for a poster if not accepted for a talk.:: :: ::
Invited Speakers
Jessica Bavaresco (University of Geneva)
Cyril Branciard (CNRS, University Grenoble Alpes)
Rafael Chaves (Federal University of Rio Grande do Norte)
Giulio Chiribella (The University of Hong Kong)
Doreen Fraser (University of Waterloo)
AnneCatherine de la Hamette (IQOQI Vienna)
Ciarán Lee (Spotify)
Tein van der Lugt (University of Oxford)
Joris M. Mooij (University of Amsterdam)
Mio Murao (University of Tokyo)
Alejandro PozasKerstjens (University of Geneva)
Renato Renner (ETH Zürich)
Thomas Richardson (University of Washington)
Sally Shrapnel (The University of Queensland)
Sumati Surya (Raman Research Institute)
Rainer Verch (University of Leipzig)
:: :: ::
Programme Committee
V Vilasini (ETH Zürich & Inria, University Grenoble Alpes) (PC Chair)
Augustin Vanrietvelde (Télécom Paris) (PC Cochair)
Alastair Abbott (Inria, University Grenoble Alpes)
Časlav Brukner (IQOQI Vienna & University of Vienna)
Eric Cavalcanti (Griffith University)
Chris Fewster (University of York)
Lucien Hardy (Perimeter Institute)
Hlér Kristjánsson (Perimeter Institute & IQC & Université de Montréal)
Giulia Rubino (University of Bristol)
Nitica Sakharwade (Università degli Studi di Napoli Federico II)
Robert Spekkens (Perimeter Institute)
Jacopo Surace (Perimeter Institute)
Elie Wolfe (Perimeter Institute)
LinQing Chen (ETH Zürich & IQOQI Vienna)
Hippolyte Dourdent (ICFO Barcelona)
Tamal Guha (University of Hong Kong)
Robin Lorenz (Quantinuum, Oxford)
Maria Papageorgiou (IQOQI Vienna)
Nicola Pinzani (Université libre de Bruxelles)
MarcoTúlio Quintino (Sorbonne Université, Paris)
MarcOlivier Renou (Inria ParisSaclay & CPHT, École polytechnique)
David Schmid (ICTQT, University of Gdańsk)
John Selby (ICTQT, University of Gdańsk)
Akihito Soeda (National Institute of Informatics, Tokyo)
Matthew Wilson (University College London)
:: :: ::
Scientific Organizers
Hlér Kristjánsson (Perimeter Institute & IQC & Université de Montréal) (Chair)
V Vilasini (ETH Zürich & Inria, University Grenoble Alpes)
Robert Spekkens (Perimeter Institute)
Lucien Hardy (Perimeter Institute)
Elie Wolfe (Perimeter Institute)
Jacopo Surace (Perimeter Institute)
Marina Maciel Ansanelli (Perimeter Institute)
Yìlè Yīng (Perimeter Institute)
María Ciudad Alañón (Perimeter Institute)
Daniel Centeno Díaz (Perimeter Institute)
Khushi Gandhi (Perimeter Institute & University of Waterloo):: :: ::
Previous editions:
Causalworlds 2022: The interface between quantum and relativistic causality, foundations and practicalities
Organised at ETH Zürich in 2022. Website: https://causalworlds.ethz.ch/" 
Quantum Theory (Core), PHYS 605, September 3 – October 4, 2024
The aim of the first part is to present a brief overview of selected topics in quantum theory. Schrodinger, Heisenberg and Interaction picture is discussed and applied to study time evolution. Density matrix and Feynman path integral are introduced. The second part of the course derives the Feynman rules for scalar quantum field theory and introduces renormalization. Instructor: Bindiya Arora / Dan Wohns Students who are not part of the PSI MSc program should review enrollment and course format information here: https://perimeterinstitute.ca/graduatecourses 
Physics of Quantum Information
The dialogue between quantum information and quantum matter has fostered notable progress in both fields. Quantum information science has revolutionized our understanding of the structure of quantum manybody systems and novel forms of outofequilibrium quantum dynamics. The advances of quantum matter have provided novel paradigms and platforms for quantum information processing.
This conference aims to bring together leading experts at the intersections of quantum information and quantum matter. Key topics include: (i) quantum error correction, (ii) quantum dynamics, and (iii) quantum simulation.Organizers:
Timothy Hsieh, Perimeter Institute
Beni Yoshida, Perimeter Institute
Zhi Li, Perimeter Institute
TsungCheng Lu, Perimeter Institute
Meenu Kumari, National Research Council Canada:: :: ::

Foundations of Quantum Computational Advantage
The workshop marks the halfway point of the similarly named (FoQaCiA, pronounced "focaccia") collaboration between researchers in Canada and Europe, funded as part of a flagship partnership between NSERC and Horizon Europe.
https://www.foqacia.org/
The goal of FoQaCiA is to develop new foundational approaches to shed light on the relative computational power of quantum devices and classical computers, helping to find the "line in the sand" separating tasks admitting a quantum speedup from those that are classically simulable.
The workshop will focus on the four central interrelated themes of the project:
1. Quantum contextuality, nonclassicality, and quantum advantage
2. The complexity of classical simulation of quantum computation
3. The arithmetic of quantum circuits
4. The efficiency of faulttolerant quantum computation
Our view is that the future success of quantum computing critically depends on advances at the most fundamental level, and that largescale investments in quantum implementations will only pay off if they can draw on additional foundational insights and ideas:: :: ::
Scientific Organizers:
Rui Soares Barbosa (INL  International Iberian Nanotechnology Laboratory)
Anne Broadbent (University of Ottawa)
Ernesto Galvão (INL  International Iberian Nanotechnology Laboratory)
Rob Spekkens (Perimeter Institute)
Jon Yard (Perimeter Institute):: :: ::
FoQaCiA is funded by:

GPTs and the probabilistic foundations of quantum theory  minicourse
Classical probability theory makes the (mostly, tacit) assumption that any two random experiments can be performed jointly. This assumption seems to fail in quantum theory. A rapidly growing literature seeks to understand QM by placing it in a much broader mathematical landscape of ``generalized probabilistic theories", or GPTs, in which incompatible experiments are permitted. Among other things, this effort has led to (i) a better appreciation that many "characteristically quantum" phenomena (e.g., entanglement) are in fact generic to nonclassical probabilistic theories, (ii) a suite of reconstructions of (mostly, finitedimensional) QM from small packages of assumptions of a probabilistic or operational nature, and (iii) a clearer view of the options available for generalizing QM. This course will offer a survey of this literature, starting from scratch and concluding with a discussion of recent developments.
Mathematical prerequisites: finitedimensional linear algebra, ideally including tensor products and duality, plus some exposure to category theory (though I will briefly review this material as needed).
Scheduling note: There will be 5 lectures from March 1226, then a gap of two weeks before the final 2 lectures held April 16 & 18.
Format: Inperson only; lectures will be recorded for PIRSA but not live on Zoom.



QPV 2023: Advances in quantum position verification
Quantum position verification (QPV) schemes use the properties of quantum information and the relativistic signalling bound to verify the location of an object (sometimes called a “tag”) to distant observers in an environment that may contain wouldbe spoofers. The guarantee is based on the assumptions of the underlying security model; various theoretically and practically interesting security models have been proposed. The area is attracting increasing interest, with new theoretical developments in security analyses, emerging experimental studies of QPV systems, and recently discovered surprising and intriguing connections to topics in quantum gravity. A workshop on QPV will be held at the Perimeter Institute for Theoretical Physics.
The workshop will cover topics related to all aspects of QPV, including, but not limited to:
 Theoretical developments related to the security of QPV schemes, including development or refinement of security models, proofs of security within given models, tradeoffs between security and efficiency, and Experimental studies of QPV and theoretical work aimed at developing practical QPV schemes.
 QPV’s relationship to other cryptographic tasks and primitives.
 QPV’s relationship to holography and quantum gravity.
Territorial Land Acknowledgement
Perimeter Institute acknowledges that it is situated on the traditional territory of the Anishinaabe, Haudenosaunee, and Neutral peoples.
Perimeter Institute is located on the Haldimand Tract. After the American Revolution, the tract was granted by the British to the Six Nations of the Grand River and the Mississaugas of the Credit First Nation as compensation for their role in the war and for the loss of their traditional lands in upstate New York. Of the 950,000 acres granted to the Haudenosaunee, less than 5 percent remains Six Nations land. Only 6,100 acres remain Mississaugas of the Credit land.
We thank the Anishinaabe, Haudenosaunee, and Neutral peoples for hosting us on their land.

Causal Inference & Quantum Foundations Workshop
Recently we have seen exciting results at the intersection of quantum foundations and the statistical analysis of causal hypotheses by virtue of the centrality of latent variable models to both fields.
In this workshop we will explore how academics from both sides can move the shared frontiers forward. Towards that end, we are including extensive breakout collaboration opportunities in addition to formal presentations. In order to make concrete progress on problems pertinent to both communities, we have selected the topic of causal models with restricted cardinality of the latent variables as a special focus for this workshop.
Sponsorship for this workshop has been provided by:
Territorial Land Acknowledgement
Perimeter Institute acknowledges that it is situated on the traditional territory of the Anishinaabe, Haudenosaunee, and Neutral peoples.
Perimeter Institute is located on the Haldimand Tract. After the American Revolution, the tract was granted by the British to the Six Nations of the Grand River and the Mississaugas of the Credit First Nation as compensation for their role in the war and for the loss of their traditional lands in upstate New York. Of the 950,000 acres granted to the Haudenosaunee, less than 5 percent remains Six Nations land. Only 6,100 acres remain Mississaugas of the Credit land.
We thank the Anishinaabe, Haudenosaunee, and Neutral peoples for hosting us on their land.

New Frontiers in Machine Learning and Quantum
This workshop will bring together a group of young trendsetters working at the frontier of machine learning and quantum information. The workshop will feature two days of talks, and ample time for participants to interact and form new collaborations in the inspiring environment of the Perimeter Institute. Topics will include machine learning, quantum field theory, quantum information, and unifying theoretical concepts.
Territorial Land AcknowledgementPerimeter Institute acknowledges that it is situated on the traditional territory of the Anishinaabe, Haudenosaunee, and Neutral peoples.
Perimeter Institute is located on the Haldimand Tract. After the American Revolution, the tract was granted by the British to the Six Nations of the Grand River and the Mississaugas of the Credit First Nation as compensation for their role in the war and for the loss of their traditional lands in upstate New York. Of the 950,000 acres granted to the Haudenosaunee, less than 5 percent remains Six Nations land. Only 6,100 acres remain Mississaugas of the Credit land.
We thank the Anishinaabe, Haudenosaunee, and Neutral peoples for hosting us on their land.

Cold Atom Molecule Interactions (CATMIN)
In the first edition of the meeting, CATMIN (Cold ATom Molecule INteractions) was a new satellite meeting of ICPEAC devoted to the study of atomic and molecular systems, where longrange interactions and the extreme properties of highly excited electrons produce new physics and lead to new technologies. CATMIN's objective is to strengthen the links between cold atom physics, molecular physics, chemistry and condensed matter physics, so that new concepts and breakthroughs can emerge. Ions, atoms and molecules are naturally made quantum systems that can be controlled with light and low frequency electromagnetic fields, thus lending themselves to precision investigations and use in quantum technologies. The second CATMIN conference will be held a few days before the ICAP, which is a major conference in AMO physics, with the idea that scientists can attend both meetings. The CATMIN meeting will be a twoday conference held at the Perimeter Institute in Waterloo, ON, centered on Rydbergatom physics, cold ion physics and the interplay between these experimental platforms. Rydberg atom physics is experiencing a renaissance due to the application of the exaggerated properties of highly excited atoms for quantum information and quantum simulation. Rydberg states can even be observed in solids which is a subject of increasing interest. Cold ions, similarly, are exciting for quantum simulation and computing, becoming one of the central platforms in the race to build a quantum computer. Many exciting developments are also in progress in the area of coldmolecules. Longrange interactions open up fields of research such as the photoassociation of cold atoms to form ultracold molecules, and the excitation of Rydberg molecules demonstrating novel kinds of molecular bonding. Strong longrange interactions in all the systems permit the investigation of the fewbody and manybody regimes, including the few to manybody transition. The conference aims to share the latest developments and results in these exciting fields among the various ICAP communities as well as the broader physics and chemistry communities. Overall, the conference can forward quantum science and the application of quantum science, which furthers these fields of research by concentrating interest to attract people and resources to the field.
Sponsorship for this event has been provided by:
Perimeter Institute will make every effort to host the conference as an inperson event. However, we reserve the right to change to an online program to align with changes in regulations due to the COVID19 pandemic.
Territorial Land Acknowledgement
Perimeter Institute acknowledges that it is situated on the traditional territory of the Anishinaabe, Haudenosaunee, and Neutral peoples.
Perimeter Institute is located on the Haldimand Tract. After the American Revolution, the tract was granted by the British to the Six Nations of the Grand River and the Mississaugas of the Credit First Nation as compensation for their role in the war and for the loss of their traditional lands in upstate New York. Of the 950,000 acres granted to the Haudenosaunee, less than 5 percent remains Six Nations land. Only 6,100 acres remain Mississaugas of the Credit land.
We thank the Anishinaabe, Haudenosaunee, and Neutral peoples for hosting us on their land.

Quantum Information 2021/2022
We will review the notion of entanglement in quantum mechanics form the point of view of information theory, and how to quantify it and distinguish it from classical correlations. We will derive Bell inequalities and discuss their importance, and how quantum information protocols can use entanglement as a resource. Then we will analyze measurement theory in quantum mechanics, the notion of generalized measurements and quantum channels and their importance in the processing and transmission of information. We will introduce the notions of quantum circuits and see some of the most famous algorithms in quantum information processing, as well as in quantum cryptography. We will also talk about the notion of distances and fidelity between states from the point of view of information theory and we will end with a little introduction to the notions of relativistic quantum information.