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/antimatter 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

15 talksCollection Number C19001
Talk

PSI 2018/2019  Cosmology Review  Lecture 1
Gang Xu Perimeter Institute for Theoretical Physics

PSI 2018/2019  Cosmology Review  Lecture 2
Gang Xu Perimeter Institute for Theoretical Physics

PSI 2018/2019  Cosmology Review  Lecture 3
Gang Xu Perimeter Institute for Theoretical Physics

PSI 2018/2019  Cosmology Review  Lecture 4
Gang Xu Perimeter Institute for Theoretical Physics

PSI 2018/2019  Cosmology Review  Lecture 5
Gang Xu Perimeter Institute for Theoretical Physics

PSI 2018/2019  Cosmology Review  Lecture 6
Gang Xu Perimeter Institute for Theoretical Physics

PSI 2018/2019  Cosmology Review  Lecture 7
Gang Xu Perimeter Institute for Theoretical Physics

PSI 2018/2019  Cosmology Review  Lecture 8
Gang Xu Perimeter Institute for Theoretical Physics


CHIMEFRB Collaboration Meeting
Collection Number C18035 
Wide Field Astronomy in Canada
Collection Number C18034 
Asymptotic Safety in a Dark Universe
17 talksCollection Number C18012Talk

Charting Fundamental Interactions
Francesco Sannino CP3Origins

Asymptotic safety with and without supersymmetry
Daniel Litim University of Sussex


Progress in constructing an Asymptotically safe Standard Model
Steven Abel Durham University

Cosmological nonConstant Problem
Niayesh Afshordi University of Waterloo


UVcomplete relativistic field theories and softened gravity
Alberto Salvio Scuola Normale Superiore di Pisa

Asymptotic safety of gravitymatter systems and effective universality
Manuel Reichert University of Southern Denmark


Open EFT's and Gravity as a Medium
Collection Number C18032 
PSI 2017/2018  Cosmology (Smith)
15 talksCollection Number C17053Talk

PSI 2017/2018  Cosmology  Lecture 1
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2017/2018  Cosmology  Lecture 2
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2017/2018  Cosmology  Lecture 3
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2017/2018  Cosmology  Lecture 4
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2017/2018  Cosmology  Lecture 5
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2017/2018  Cosmology  Lecture 6
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2017/2018  Cosmology  Lecture 7
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2017/2018  Cosmology  Lecture 8
Kendrick Smith Perimeter Institute for Theoretical Physics


General Relativity for Cosmology (PHYS786/AMATH875)  Achim Kempf
24 talksCollection Number C17021Talk

General Relativity for Cosmology  Lecture 1
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 2
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 3
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 4
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 5
Achim Kempf University of Waterloo

General Relativity for Cosmology  Lecture 6
Achim Kempf University of Waterloo


General Relativity for Cosmology  Lecture 8
Achim Kempf University of Waterloo


Bounce Scenarios in Cosmology
16 talksCollection Number C17024Talk

Welcome and Opening Remarks

Steffen Gielen University of Sheffield

Neil Turok University of Edinburgh


Bounce in Loop Quantum Cosmology and its Implications
Abhay Ashtekar Pennsylvania State University

Observable Consequences of a Bounce
UeLi Pen Canadian Institute for Theoretical Astrophysics (CITA)

Challenges for Bouncing Cosmologies
Robert Brandenberger McGill University  Department of Physics

Emergent bouncing cosmology from quantum gravity condensates
Edward WilsonEwing University of New Brunswick

Discussion Session 2

Angelika Fertig TotalEnergies (France)

Steffen Gielen University of Sheffield

Elizabeth Gould Arthur B. McDonald Canadian Astroparticle Physics Research Institute





PSI 2016/2017  Explorations in Cosmology (Smith)
14 talksCollection Number C17012Talk

PSI 2016/2017  Explorations in Cosmology  Lecture 1
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2016/2017  Explorations in Cosmology  Lecture 2
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2016/2017  Explorations in Cosmology  Lecture 3
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2016/2017  Explorations in Cosmology  Lecture 4
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2016/2017  Explorations in Cosmology  Lecture 5
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2016/2017  Explorations in Cosmology  Lecture 6
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2016/2017  Explorations in Cosmology  Lecture 7
Kendrick Smith Perimeter Institute for Theoretical Physics

PSI 2016/2017  Explorations in Cosmology  Lecture 8
Kendrick Smith Perimeter Institute for Theoretical Physics


PSI 2016/2017  Cosmology (Kubiznak)
15 talksCollection Number C17003Talk

PSI 2016/2017  Cosmology (Review)  Lecture 1
David Kubiznak Charles University

PSI 2016/2017  Cosmology (Review)  Lecture 2
David Kubiznak Charles University

PSI 2016/2017  Cosmology (Review)  Lecture 3
David Kubiznak Charles University

PSI 2016/2017  Cosmology (Review)  Lecture 4
David Kubiznak Charles University

PSI 2016/2017  Cosmology (Review)  Lecture 5
David Kubiznak Charles University

PSI 2016/2017  Cosmology (Review)  Lecture 6
David Kubiznak Charles University

PSI 2016/2017  Cosmology (Review)  Lecture 7
David Kubiznak Charles University

PSI 2016/2017  Cosmology (Review)  Lecture 8
David Kubiznak Charles University


Time in Cosmology
14 talksCollection Number C16016Talk

Welcome and Opening Remarks

Marina Cortes Institute for Astrophysics and Space Sciences

Lee Smolin Perimeter Institute for Theoretical Physics

Neil Turok University of Edinburgh



The origin of arrows of time II

Sean Carroll California Institute of Technology (Caltech)  Division of Physics Mathematics & Astronomy

Marina Cortes Institute for Astrophysics and Space Sciences

Tim Koslowski Technical University of Applied Sciences WürzburgSchweinfurt


The origin of arrows of time II cont.

Sean Carroll California Institute of Technology (Caltech)  Division of Physics Mathematics & Astronomy

Marina Cortes Institute for Astrophysics and Space Sciences

Tim Koslowski Technical University of Applied Sciences WürzburgSchweinfurt


Testing time asymmetry in the early universe

Brian Keating University of California, San Diego

Andrew Liddle University of Lisbon

Richard Muller University of California, Berkeley


The fate of the big bang

Abhay Ashtekar Pennsylvania State University

Neil Turok University of Edinburgh


Time as Organization – Downward Caustation, Structure and Complexity I
Barbara Drossel Technische Universität Darmstadt

Time as Organization – Downward Caustation, Structure and Complexity II

Stuart Kauffman Santa Fe Institute

George Ellis University of Cape Town



Cosmological Frontiers in Fundamental Physics 2016
21 talksCollection Number C16009Talk

Welcome and Opening Remarks
PIRSA:16060006 
Dark matter phenomenology across cosmic times
Yacine AliHaimoud Johns Hopkins University




A new probe of primordial magnetic fields at high redshift
Vera Gluscevic University of Southern California

Turbulent gravity in asymptotically AdS spacetimes
Stephen Green University of Nottingham

Black hole ringdown and quasinormal modes
Aaron Zimmerman The University of Texas at Austin


PSI 2018/2019  Cosmology Review (Xu)
15 talksCollection Number C19001PSI 2018/2019  Cosmology Review (Xu) 
CHIMEFRB Collaboration Meeting
Collection Number C18035 
Wide Field Astronomy in Canada
Collection Number C18034Canada has great ambitions in the area of widefield astronomical surveys and a strong heritage. On the eve of the Canadian Long Range Plan 2020 this workshop brings together the Canadian wide field astronomy community to discuss our strategy including possible areas of scientific and technical coordination. We will review existing and nearterm surveys on facilities including CFHT MWA CHIME Dragonfly Gaia SDSSV DESI Euclid and LSST as well as future projects like MSE and SKA1 on the ground and WFIRST and CASTOR in space. Invited talks will highlight areas of rapid expansion including time domain astrophysics and radio surveys as well as data archives and computing platforms like CADC Canfar and CIRADA that enable the exploitation of wide field and timedomain data by the community. Our activities aim to ensure that wide field and timedomain science emerge with strong support in LRP2020 and are able to attract significant funding.

Asymptotic Safety in a Dark Universe
17 talksCollection Number C18012The asymptotic safety paradigm is currently emerging as a highly promising idea for BeyondStandardModel 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 gravitymatter 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 longstanding 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 darkmattermodels. 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 1520 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 followup work that might lead into future joint projects.

Open EFT's and Gravity as a Medium
Collection Number C18032This event is meant to study the connections between quantum fields in curved spacetimes with horizons and the effective field theory methods as applied to open systems (Open EFTs). In particular the hope is to exploit the existence of tools (from areas like optics) for dealing with hierarchies of scale in open systems and adapt the to see if they can inform our understanding of controlling latetime predictions in gravitational environments. Please note that this meeting is by invitation only.

PSI 2017/2018  Cosmology (Smith)
15 talksCollection Number C17053PSI 2017/2018  Cosmology (Smith) 
General Relativity for Cosmology (PHYS786/AMATH875)  Achim Kempf
24 talksCollection Number C17021General Relativity for Cosmology (PHYS786/AMATH875)  Achim Kempf 

PSI 2016/2017  Explorations in Cosmology (Smith)
14 talksCollection Number C17012PSI 2016/2017  Explorations in Cosmology (Smith) 
PSI 2016/2017  Cosmology (Kubiznak)
15 talksCollection Number C17003PSI 2016/2017  Cosmology (Kubiznak) 

Cosmological Frontiers in Fundamental Physics 2016
21 talksCollection Number C16009Cosmological Frontiers in Fundamental Physics 2016