Cosmologists at Perimeter Institute seek to help pin down the constituents and history of our universe, and the rules governing its origin and evolution. Many of the most interesting clues about physics beyond the standard model (e.g., dark matter, dark energy, the matter/anti-matter asymmetry, and the spectrum of primordial density perturbations], come from cosmological observations, and cosmological observations are often the best way to test or constrain a proposed modification of the laws of nature, since such observations can probe length scales, time scales, and energy scales that are beyond the reach of terrestrial laboratories.
Format results
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2 talks-Collection NumberC20012
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PSI 2019/2020 - Cosmology (Part 1)
8 talks-Collection NumberC20009Talk
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PSI 2019/2020 - Cosmology Part 1 - Lecture 1
York University -
PSI 2019/2020 - Cosmology Part 1 - Lecture 2
York University -
PSI 2019/2020 - Cosmology Part 1 - Lecture 3
York University -
PSI 2019/2020 - Cosmology Part 1 - Lecture 4
York University -
PSI 2019/2020 - Cosmology Part 1 - Lecture 5
York University -
PSI 2019/2020 - Cosmology Part 1 - Lecture 6
York University -
PSI 2019/2020 - Cosmology Part 1 - Lecture 7
York University -
PSI 2019/2020 - Cosmology Part 1 - Lecture 8
York University
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Emmy Noether Workshop: The Structure of Quantum Space Time
25 talks-Collection NumberC19047Talk
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Welcome and Opening Remarks
Perimeter Institute for Theoretical Physics -
Quantum Spacetime from Lattice Gravity à la CDT
Radboud Universiteit Nijmegen -
How complement maps can cure divergences
University of Potsdam -
The gravitational Wilson loop and the non-Abelian Stokes' theorem
Okinawa Institute of Science and Technology Graduate University -
The dynamics of difference
Perimeter Institute for Theoretical Physics -
Quantum reference frames for space and time
ETH Zurich -
Probing fundamental physics with gravitational waves
Universidade Federal do ABC -
Implications of the Quantum Nature Space-time for the Big Bang and Black Holes
Pennsylvania State University
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Everpresent Lambda: Theory Meets Observations
15 talks-Collection NumberC19046Talk
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Introduction to Everpresent Lambda
Perimeter Institute for Theoretical Physics -
Status of Hubble tension in Cosmology
University of Waterloo -
Causal Set Action/Entropy
Dublin Institute For Advanced Studies -
Observational constraints on modified gravity and dark energy
Simon Fraser University (SFU) -
Supplementary considerations on Everpresent Lambda
Perimeter Institute for Theoretical Physics -
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Implementing a stochastic dark energy framework into CAMB
Simon Fraser University (SFU)
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Simplicity III
17 talks-Collection NumberC19044Talk
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On the possible role of nilpotent internal symmetries in unification
Wigner Research Center for Physics -
Rethinking the origin of neutrino masses: the role of gravity
University of Bonn -
Swampland Constraints on Neutrino Masses and Dark Energy
European Organization for Nuclear Research (CERN) -
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Exceptional Quantum Algebra for the Standard Model of Particle Physics
Bulgarian Academy of Sciences -
SO(7,7) Structure of Standard Model Fermions
University of Nottingham -
The Standard Model from A Jordan Algebra
University of Edinburgh -
Particle Theory from Jordan Geometry
Max Planck Institute for Gravitational Physics - Albert Einstein Institute (AEI)
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Cosmological Frontiers in Fundamental Physics 2019
22 talks-Collection NumberC19037Talk
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CPT-Symmetric Universe
University of Edinburgh -
Brane cosmology and the self-tuning of the cosmological constant
Université Paris Cité -
New Physics in the Rayleigh-Jeans tale of the CMB and cosmic 21cm signal
University of Minnesota -
Gravitational waves in the inhomogeneous Universe
Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) -
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Discussion: Where in the Cosmos should we look for novel physics?
University of Crete -
Gravitational wave standard sirens
University of Amsterdam -
Cosmology and fundamental physics with FRBs
Canadian Institute for Theoretical Astrophysics (CITA)
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PSI 2018/2019 - Explorations in Cosmology (Smith)
13 talks-Collection NumberC19020Talk
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PSI 2018/2019 - Explorations in Cosmology - Lecture 1
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Explorations in Cosmology - Lecture 2
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Explorations in Cosmology - Lecture 3
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Explorations in Cosmology - Lecture 4
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Explorations in Cosmology - Lecture 5
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Explorations in Cosmology - Lecture 6
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Explorations in Cosmology - Lecture 7
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Explorations in Cosmology - Lecture 8
Perimeter Institute for Theoretical Physics
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PI-CITA Day 2019
6 talks-Collection NumberC19016Talk
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Angular momentum radiated by electromagnetic vs gravitational waves
Radboud Universiteit Nijmegen -
Ultralight axions and Future CMB experiments
University of Toronto -
Not extending the standard cosmological model
University of Lisbon -
The Astrophysics of Cosmic Rays
Canadian Institute for Theoretical Astrophysics (CITA) -
The existence and stability of marginally trapped surfaces
Perimeter Institute for Theoretical Physics -
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PSI 2018/2019 - Cosmology Review (Xu)
15 talks-Collection NumberC19001Talk
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PSI 2018/2019 - Cosmology Review - Lecture 1
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Cosmology Review - Lecture 2
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Cosmology Review - Lecture 3
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Cosmology Review - Lecture 4
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Cosmology Review - Lecture 5
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Cosmology Review - Lecture 6
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Cosmology Review - Lecture 7
Perimeter Institute for Theoretical Physics -
PSI 2018/2019 - Cosmology Review - Lecture 8
Perimeter Institute for Theoretical Physics
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PSI 2018/2019 - Foundations of Quantum Mechanics (Leifer)
15 talks-Collection NumberC19002Talk
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Asymptotic Safety in a Dark Universe
17 talks-Collection NumberC18012Talk
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Charting Fundamental Interactions
CP3-Origins -
Asymptotic safety with and without supersymmetry
University of Sussex -
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Progress in constructing an Asymptotically safe Standard Model
Durham University -
Cosmological non-Constant Problem
University of Waterloo -
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UV-complete relativistic field theories and softened gravity
Scuola Normale Superiore di Pisa -
Asymptotic safety of gravity-matter systems and effective universality
University of Southern Denmark
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PSI 2017/2018 - Cosmology (Smith)
15 talks-Collection NumberC17053Talk
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PSI 2017/2018 - Cosmology - Lecture 1
Perimeter Institute for Theoretical Physics -
PSI 2017/2018 - Cosmology - Lecture 2
Perimeter Institute for Theoretical Physics -
PSI 2017/2018 - Cosmology - Lecture 3
Perimeter Institute for Theoretical Physics -
PSI 2017/2018 - Cosmology - Lecture 4
Perimeter Institute for Theoretical Physics -
PSI 2017/2018 - Cosmology - Lecture 5
Perimeter Institute for Theoretical Physics -
PSI 2017/2018 - Cosmology - Lecture 6
Perimeter Institute for Theoretical Physics -
PSI 2017/2018 - Cosmology - Lecture 7
Perimeter Institute for Theoretical Physics -
PSI 2017/2018 - Cosmology - Lecture 8
Perimeter Institute for Theoretical Physics
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PSI 2019/2020 - Machine Learning for Many-Body Physics
2 talks-Collection NumberC20012PSI 2019/2020 - Machine Learning for Many-Body Physics -
PSI 2019/2020 - Cosmology (Part 1)
8 talks-Collection NumberC20009PSI 2019/2020 - Cosmology (Part 1) -
Emmy Noether Workshop: The Structure of Quantum Space Time
25 talks-Collection NumberC19047Understanding the small-scale 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.
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Everpresent Lambda: Theory Meets Observations
15 talks-Collection NumberC19046One 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.
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Simplicity III
17 talks-Collection NumberC19044This cross-disciplinary workshop gathers theorists who have been working on novel approaches to understanding the structure of the Standard Model and its link to cosmology and gravity. It follows the previous Simplicity I and II workshops at Princeton University (2014) and Fermilab (2016) and will be a small informal meeting with plenty of room for discussions.
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Cosmological Frontiers in Fundamental Physics 2019
22 talks-Collection NumberC19037The workshops focuses on novel frontiers in observational cosmology and astrophysics and how they shed light fundamental questions in understanding the universe. Registration for this workshop is now open.
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PSI 2018/2019 - Explorations in Cosmology (Smith)
13 talks-Collection NumberC19020PSI 2018/2019 - Explorations in Cosmology (Smith) -
PI-CITA Day 2019
6 talks-Collection NumberC19016This is an ongoing series of meetings held two or three times per year between researchers at Perimeter Institute and CITA. The goal of these meetings is to share new ideas and encourage interaction in PI and CITA's common fields of interest through a series of informal talks followed by discussions.
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PSI 2018/2019 - Cosmology Review (Xu)
15 talks-Collection NumberC19001PSI 2018/2019 - Cosmology Review (Xu) -
PSI 2018/2019 - Foundations of Quantum Mechanics (Leifer)
15 talks-Collection NumberC19002PSI 2018/2019 - Foundations of Quantum Mechanics (Leifer) -
Asymptotic Safety in a Dark Universe
17 talks-Collection NumberC18012The asymptotic safety paradigm is currently emerging as a highly promising idea for Beyond-Standard-Model physics with key progress in asymptotically safe quantum gravity and asymptotically safe matter models. The last years have seen not only the development of asymptotically safe gravity-matter models but also the discovery of asymptotically safe beyond Standard Model matter models that are under control in perturbation theory. New exciting avenues in (astro) particle physics are now waiting to be explored. For example although the nature of dark matter is a long-standing riddle it is a fact that experimental searches have so far not provided any direct clues but have instead come up with ever more stringent constraints on theoretically preferred regions of parameter space for dark-matter-models. Thus the key to unraveling this riddle could be a new theoretical paradigm to guide model builders. This workshop aims at exploring whether asymptotic safety can be a candidate for this new paradigm. We aim to bring together experts on phenomenological models and quantum gravity to probe both the theoretical viability and empirical signatures of asymptotically safe extensions of the standard model that include gravity. To facilitate a highly productive meeting that can trigger new collaborations each talk will be followed up by 15-20 minutes discussion time. Further each day of the workshop will feature a dedicated discussion session. Participants will be encouraged to contribute questions for the discussion both before as well as during the workshop. The last day of the workshop will conclude with a roadmap discussion during which all participants will be given the opportunity to propose concrete suggestions for follow-up work that might lead into future joint projects.
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PSI 2017/2018 - Cosmology (Smith)
15 talks-Collection NumberC17053PSI 2017/2018 - Cosmology (Smith)