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Talk
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Lecture - Quantum Gravity, PHYS 644
Aldo Riello Perimeter Institute for Theoretical Physics
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Lecture - Quantum Gravity, PHYS 644
Aldo Riello Perimeter Institute for Theoretical Physics
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Lecture - Quantum Gravity, PHYS 644
Aldo Riello Perimeter Institute for Theoretical Physics
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Lecture - Quantum Gravity, PHYS 644
Aldo Riello Perimeter Institute for Theoretical Physics
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Lecture - Quantum Gravity, PHYS 644
Aldo Riello Perimeter Institute for Theoretical Physics
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Lecture - Quantum Gravity, PHYS 644
Aldo Riello Perimeter Institute for Theoretical Physics
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Lecture - Quantum Gravity, PHYS 644
Aldo Riello Perimeter Institute for Theoretical Physics
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Lecture - Quantum Gravity, PHYS 644
Aldo Riello Perimeter Institute for Theoretical Physics
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Talk
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Lecture - Causal Inference, PHYS 777
Robert Spekkens Perimeter Institute for Theoretical Physics
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Lecture - Causal Inference, PHYS 777
Robert Spekkens Perimeter Institute for Theoretical Physics
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Lecture - Causal Inference, PHYS 777
Robert Spekkens Perimeter Institute for Theoretical Physics
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Lecture - Causal Inference, PHYS 777
Robert Spekkens Perimeter Institute for Theoretical Physics
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Lecture - Causal Inference, PHYS 777
Robert Spekkens Perimeter Institute for Theoretical Physics
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Lecture - Causal Inference, PHYS 777
Robert Spekkens Perimeter Institute for Theoretical Physics
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Lecture - Causal Inference, PHYS 777
Robert Spekkens Perimeter Institute for Theoretical Physics
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Lecture - Causal Inference, PHYS 777
Robert Spekkens Perimeter Institute for Theoretical Physics
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Talk
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Snap, Crackle and Pop
Roger Blandford Roger Blandford
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Black Hole Jet Sheath as a Candidate for the Comptonizing Corona
Navin Sridhar Stanford University
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Workshop Talk
Luciano Combi Perimeter Institute for Theoretical Physics
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Rethinking The Black Hole Corona as an Extended, Multizone Outflow
Lia Hankla University of Maryland, College Park
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Quantifying flux rope characteristics in relativistic 3D reconnection simulations
Jesse Vos Katholieke Universiteit Leuven
PIRSA:25030133
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Talk
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Relativistic spacetimes surrounded by matter: mimicking astrophysical setups
Vitor CardosoICTS:31328 -
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Talk
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Quantum Spacetime: from Speculation to Numbers
Renate Loll Radboud Universiteit Nijmegen
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Quantum Gravity through the lens of Effective Field Theory
Alessia Platania University of Copenhagen
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Planck-scale violations of relativistic symmetries in astrophysics and in quantum systems
Giulia Gubitosi University of Naples Federico II
PIRSA:25030057 -
Quantum Dynamics of Causal Sets: Results and Challenges
Sumati Surya Raman Research Institute
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Ensembles of open quantum systems as a tool for quantum spacetime
Sarah Shandera Pennsylvania State University
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Exploring the expanding Universe with the Dark Energy Survey
Jessica Muir University of Cincinnati
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Gravitational waves as a window on gravity
Jocelyn Read California State University, Fullerton
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Quantum Gravity in the era of Gravitational-Wave astronomy
Mairi Sakellariadou King's College London
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Talk
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How Might We Improve a Community Function Though Community Selection? (Lecture 3)
Wenying ShouICTS:31062 -
Multistability in Microbial Communities Explained by the Stable Marriage Problem
Akshit GoyalICTS:31022 -
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A Survey is All You Need: Deriving Quantitative models from Open-ended Responses
Sayantari GhoshICTS:31061 -
Guaranteed cost equilibrium strategies for the control of networked multi-agent systems
Puduru Viswanadha ReddyICTS:31059
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Quantum Gravity (Elective), PHYS 644, February 24 - March 28, 2025
The main goal of this course is to show in which ways General Relativity (GR) is similar, and especially in which ways it is different, from other gauge theories. The largest component of the course is dedicated to studying the specific symmetry structure of GR and how it intimately relates to its dynamics. To do so, we will introduce a host of concepts and techniques, broadly (and loosely) known under the name of “Covariant Phase Space Method”. This provides a different perspective on GR’s physics, a perspective in which phase space, rather than spacetime, is front and center. Along the way we will take a few detours: we will explore (parts of) the historical debate on whether gravity should be quantized at all, discuss how to think of time evolution when there is no absolute time, and go through Wald’s proposal of black hole entropy as a Noether charge. The intended outcome of the course is to provide a new perspective on GR which, hopefully, will inform you on why it is much harder to quantize than other theories – especially from a non-perturbative perspective. In this sense the course always keeps an eye on Quantum Gravity, even though there will be very little “quantum” in it. It is also a course that does not hinge on any specific approach to the quantization of gravity. Also, it is worth noting that the covariant phase space techniques are broadly used in the current literature on the black hole information paradox, soft symmetries, and holography, and is therefore a useful tool to learn if you are interested in any of these topics. Instructor: Aldo Riello Students who are not part of the PSI MSc program should review enrollment and course format information here: https://perimeterinstitute.ca/graduate-courses -
Causal Inference (Elective), PHYS 777, March 31 - May 2, 2025
Can the effectiveness of a medical treatment be determined without the expense of a randomized controlled trial? Can the impact of a new policy be disentangled from other factors that happen to vary at the same time? Questions such as these are the purview of the field of causal inference, a general-purpose science of cause and effect, applicable in domains ranging from epidemiology to economics. Researchers in this field seek in particular to find techniques for extracting causal conclusions from statistical data. Meanwhile, one of the most significant results in the foundations of quantum theory—Bell’s theorem—can also be understood as an attempt to disentangle correlation and causation. Recently, it has been recognized that Bell’s result is an early foray into the field of causal inference and that the insights derived from almost 60 years of research on his theorem can supplement and improve upon state-of-the-art causal inference techniques. In the other direction, the conceptual framework developed by causal inference researchers provides a fruitful new perspective on what could possibly count as a satisfactory causal explanation of the quantum correlations observed in Bell experiments. Efforts to elaborate upon these connections have led to an exciting flow of techniques and insights across the disciplinary divide. This course will explore what is happening at the intersection of these two fields. Instructor: Robert Spekkens/Bindiya Arora Students who are not part of the PSI MSc program should review enrollment and course format information here: https://perimeterinstitute.ca/graduate-courses -
Magnetic Fields Around Compact Objects Workshop
In the vicinity of neutron stars and black holes, where spacetime is strongly curved, magnetic fields can power many of the violent phenomena that we observe across the entire electromagnetic spectrum, from accretion and jet launching, to magnetar flares and pulsar emission. In the last decades, our theoretical understanding of the role of magnetic fields in these extreme environments has greatly improved through numerical simulations of magnetohydrodynamical fluids and charged kinetic particles; however, many open and important questions remain. Our observational capabilities and computational resources will keep growing dramatically in the next few years, allowing us to explore high-energy astrophysics in unprecedented regimes. Improving our knowledge of how magnetic fields, matter, and gravity interact with each other is a crucial piece in the new era of multimessenger astrophysics.This workshop will gather experts from a wide range of disciplines within physics and astrophysics to present state-of-the-art advances in theoretical models of magnetic fields and high-energy plasma in different contexts, from neutron star mergers to supermassive black holes, and from micro scales to macro scales.This workshop is sponsored in part by the Canadian Institute for Theoretical Astrophysics (CITA).
Scientific Organizers:
Luciano Combi (Perimeter Institute & U of Guelph)
Sean Ressler (CITA)
Bart Ripperda (CITA)
Luis Lehner (Perimeter Institute)
Will East (Perimeter Institute)
Gibwa Musoke (CITA)
Chris Thompson (CITA)
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Beyond the Horizon: Testing the black hole paradigm
We are living in an exciting era of great discoveries in the field of gravitational physics. The detection of gravitational waves by the LIGO-VIRGO-KAGRA (LVK) collaboration starting from 2016 has already led to an enormous interest in various aspects of the physics of compact objects. The recent observations of the shadows of the galactic centers for M87 and Milky Way, by the Event Horizon Telescope (EHT), have further resulted into diverse research programs on the nature of compact objects. The primary emphasis of these observations is to test the theory of general relativity at the strong-field regime and to understand the nature of the astrophysical compact objects. Several recent developments led to the extensive use of various new mathematical and computational techniques to probe the physics associated with these compact objects. The primary motivation of the school would be to learn from leading researchers about several crucial aspects of the physics of compact objects. The p...
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Beyond the Horizon: Testing the black hole paradigm
We are living in an exciting era of great discoveries in the field of gravitational physics. The detection of gravitational waves by the LIGO-VIRGO-KAGRA (LVK) collaboration starting from 2016 has already led to an enormous interest in various aspects of the physics of compact objects. The recent observations of the shadows of the galactic centers for M87 and Milky Way, by the Event Horizon Telescope (EHT), have further resulted into diverse research programs on the nature of compact objects. The primary emphasis of these observations is to test the theory of general relativity at the strong-field regime and to understand the nature of the astrophysical compact objects. Several recent developments led to the extensive use of various new mathematical and computational techniques to probe the physics associated with these compact objects. The primary motivation of the school would be to learn from leading researchers about several crucial aspects of the physics of compact objects. The p...
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String Theory Bootcamp
Short course offered as preparation for AdS/CFT. Taught by Gang Xu. No credit. Optional. -
Emmy Noether Workshop: Quantum Space Time
Constructing a theory of quantum gravity, and with it a notion of quantum spacetime is one of the biggest challenges faced by modern theoretical physics. This workshop will bring together researchers from a wide range of viewpoints and give them an opportunity to exchange ideas and gain new insights.
The workshop is supported by the Simons Foundation.
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Workshop Speakers
Marcela Carena (Perimeter Institute)
Astrid Eichhorn (Universität Heidelberg)
Netta Englehardt (MIT)
Johanna Erdmenger (University of Würzburg)
Gulia Gubitosi (University of Naples Federico II)
Renate Loll (Radboud University)
Jessica Muir (Perimeter Institute)
A.W. Peet (University of Toronto)
Alessia Platania (University of Copenhagen)
Jocelyn Read (California State University, Fullerton)
Kasia Rejzner (York University)
Mairi Sakellariadou (King's College London)
Sarah Shandera (Pennsylvania State University)
Sumati Surya (Raman Research Institute)
Karen Yeats (University of Waterloo):: :: ::
Scientific Organizers
Bianca Dittrich (Perimeter Institute)
Sabrina Pasterski (Perimeter Institute)
Céline Zwikel (Perimeter Institute)
Sruthi Narayanan (Perimeter Institute) -
Decisions, Games, and Evolution
Cooperation is seen across all biological scales ranging from cells to societies. In organisms like bacteria, the decision-making process is genetically hardwired but higher animals endowed with cognitive abilities have to make choices that can affect not only their own survival but also that of their group.Uncovering the organizing principles that lead to evolution of cooperation is an issue of fundamental importance that transcends disciplinary boundaries. Insights can be obtained from studying biological communities, through mathematical and agent-based modeling, cognitive science, social network dynamics and behavioral economics. Such investigations can also lead to the understanding of other intriguing evolutionary phenomena like opinion dynamics, evolution of fairness and spiteful behaviour. Evolutionary Game Theory provides a powerful framework for addressing such questions in the context of both biological and cultural evolution. In this program, we will therefore be addressin...
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Decisions, Games, and Evolution
Cooperation is seen across all biological scales ranging from cells to societies. In organisms like bacteria, the decision-making process is genetically hardwired but higher animals endowed with cognitive abilities have to make choices that can affect not only their own survival but also that of their group.Uncovering the organizing principles that lead to evolution of cooperation is an issue of fundamental importance that transcends disciplinary boundaries. Insights can be obtained from studying biological communities, through mathematical and agent-based modeling, cognitive science, social network dynamics and behavioral economics. Such investigations can also lead to the understanding of other intriguing evolutionary phenomena like opinion dynamics, evolution of fairness and spiteful behaviour. Evolutionary Game Theory provides a powerful framework for addressing such questions in the context of both biological and cultural evolution. In this program, we will therefore be addressin...
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ICTS Open Day Festival 2025
Celebrate Science Day 2025 with ICTS!ICTS is opening its doors to the public for an exciting Science Festival! Join us on campus to explore groundbreaking research, interact with our brilliant minds, and experience science like never before. Students and faculties from ICTS will showcase their fascinating research works before you. Each research group from ICTS will explain their area of research to you. We also have select exhibits from public participants.Don’t miss this golden opportunity—come, explore, and ignite your curiosity!Supported by Arista Networks India Pvt. Ltd.
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ICTS Open Day Festival 2025
Celebrate Science Day 2025 with ICTS!ICTS is opening its doors to the public for an exciting Science Festival! Join us on campus to explore groundbreaking research, interact with our brilliant minds, and experience science like never before. Students and faculties from ICTS will showcase their fascinating research works before you. Each research group from ICTS will explain their area of research to you. We also have select exhibits from public participants.Don’t miss this golden opportunity—come, explore, and ignite your curiosity!Supported by Arista Networks India Pvt. Ltd.