Format results

Talk

Welcome and Opening Remarks
Bianca Dittrich Perimeter Institute for Theoretical Physics

Quantum Spacetime from Lattice Gravity à la CDT
Renate Loll Radboud Universiteit Nijmegen

How complement maps can cure divergences
Sylvie Paycha Universität Potsdam

The gravitational Wilson loop and the nonAbelian Stokes' theorem
Reiko Toriumi Okinawa Institute of Science and Technology (OIST)

The dynamics of difference
Lee Smolin Perimeter Institute for Theoretical Physics


Probing fundamental physics with gravitational waves
Cecilia Chirenti Universidade Federal do ABC

Implications of the Quantum Nature Spacetime for the Big Bang and Black Holes
Abhay Ashtekar Pennsylvania State University


Talk

On the possible role of nilpotent internal symmetries in unification
Andras Laszlo Wigner Research Center for Physics

Rethinking the origin of neutrino masses: the role of gravity
Lena Funcke University of Bonn

Swampland Constraints on Neutrino Masses and Dark Energy
Irene Valenzuela Cornell University


Exceptional Quantum Algebra for the Standard Model of Particle Physics
Ivan Todorov Bulgarian Academy of Sciences

SO(7,7) Structure of Standard Model Fermions
Kirill Krasnov University of Nottingham

The Standard Model from A Jordan Algebra
Latham Boyle University of Edinburgh

Particle Theory from Jordan Geometry
Shane Farnsworth Max Planck Institute for Gravitational Physics  Albert Einstein Institute (AEI)


Talk

PSI 2019/2020  Relativity (Kubiznak)  Lecture 15
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 14
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 13
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 12
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 11
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 10
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 9
David Kubiznak Charles University

PSI 2019/2020  Relativity (Kubiznak)  Lecture 8
David Kubiznak Charles University


Talk

PSI 2018/2019  Strong Field Gravity  Lecture 15
William East Perimeter Institute for Theoretical Physics

PSI 2018/2019  Strong Field Gravity  Lecture 14
William East Perimeter Institute for Theoretical Physics

PSI 2018/2019  Strong Field Gravity  Lecture 13
William East Perimeter Institute for Theoretical Physics

PSI 2018/2019  Strong Field Gravity  Lecture 12
William East Perimeter Institute for Theoretical Physics

PSI 2018/2019  Strong Field Gravity  Lecture 11
William East Perimeter Institute for Theoretical Physics

PSI 2018/2019  Strong Field Gravity  Lecture 10
William East Perimeter Institute for Theoretical Physics

PSI 2018/2019  Strong Field Gravity  Lecture 9
William East Perimeter Institute for Theoretical Physics

PSI 2018/2019  Strong Field Gravity  Lecture 8
William East Perimeter Institute for Theoretical Physics


Talk

PSI 2018/2019  Explorations in Quantum Gravity  Lecture 15

Sebastian Steinhaus Friedrich Schiller University Jena

Etera Livine French National Centre for Scientific Research (CNRS)

Laurent Freidel Perimeter Institute for Theoretical Physics


PSI 2018/2019  Explorations in Quantum Gravity  Lecture 14

Wolfgang Wieland University of ErlangenNuremberg

Hal Haggard Bard College


PSI 2018/2019  Explorations in Quantum Gravity  Lecture 13
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2018/2019  Explorations in Quantum Gravity  Lecture 12
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2018/2019  Explorations in Quantum Gravity  Lecture 11
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2018/2019  Explorations in Quantum Gravity  Lecture 10
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2018/2019  Explorations in Quantum Gravity  Lecture 9
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2018/2019  Explorations in Quantum Gravity  Lecture 8
Maïté Dupuis Perimeter Institute for Theoretical Physics


Talk


Hitting the High Notes: The High Frequency Dynamics of Neutron Star Mergers
William East Perimeter Institute for Theoretical Physics

PostMerger Gravitational Wave Emission
Andreas Bauswein Max Planck Institute for Astrophysics (MPA), Garching

Searching for Ultralight Particles with Gravitational Waves
Masha Baryakhtar University of Washington

3G Detectors, Voyager
Rana Adhikari California Institute of Technology (Caltech)  Division of Physics Mathematics & Astronomy


Gravitational Wave Telescopes: Some Cosmological Considerations
Latham Boyle University of Edinburgh

Astrophysics and Cosmology with GravitationalWave Population Inference
Eric Thrane Monash University  Department of Physics


Talk

Searching for Light Bosons with Black Hole Superradiance
Savas Dimopoulos Perimeter Institute for Theoretical Physics

Superradiant instabilities and rotating black holes
Sam Dolan University of Southampton

Superradiant instabilities and rotating black holes
Avery Broderick University of Waterloo

Measuring StellarMass Black Hole Spins via Xray Spectroscopy
James Steiner Massachusetts Institute of Technology (MIT)

Superradiance Beyond the Linear Regime
Frans Pretorius Princeton University

Characterization of compact objects with present and future groundbased gravitationalwave detectors
Salvatore Vitale Massachusetts Institute of Technology (MIT)

LIGO and Virgo continuous wave searches  Overview and allsky searches
keith Riles University of Michigan–Ann Arbor

Directed and targeted searches for continuous gravitational waves
Sylvia Zhu Albert Einstein Institute


Talk

PSI 2017/2018  Quantum Gravity  Lecture 15
Laurent Freidel Perimeter Institute for Theoretical Physics

PSI 2017/2018  Quantum Gravity  Lecture 14
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2017/2018  Quantum Gravity  Lecture 13
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2017/2018  Quantum Gravity  Lecture 12
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2017/2018  Quantum Gravity  Lecture 11
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2017/2018  Quantum Gravity  Lecture 10
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2017/2018  Quantum Gravity  Lecture 9
Maïté Dupuis Perimeter Institute for Theoretical Physics

PSI 2017/2018  Quantum Gravity  Lecture 8
Maïté Dupuis Perimeter Institute for Theoretical Physics


Talk

Welcome and Opening Remarks
Neil Turok University of Edinburgh

The significance of the proper time in the quantum mechanics of the gravitational field.
Claudio Bunster Centro de Estudios Científicos (CECs)

TBA
Viatcheslav Mukhanov LudwigMaximiliansUniversitiät München (LMU)

Semiclassical evaluation of the 3D gravity path integral and quasilocal holography
Bianca Dittrich Perimeter Institute for Theoretical Physics

TBA
Emil Mottola Los Alamos National Laboratory

An asymptotically safe point of view on the gravitational path integral
Astrid Eichhorn University of Southern Denmark

The path integral for gravity and Fedosov quantization
Stefan Hollands Universität Leipzig

Surprises in the Path Integral for Gravity
Neil Turok University of Edinburgh


Emmy Noether Workshop: The Structure of Quantum Space Time
Understanding the smallscale 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.

Simplicity III
This crossdisciplinary 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.

PSI 2019/2020  Relativity (Kubiznak)
PSI 2019/2020  Relativity (Kubiznak) 
PSI 2019/2020  Classical Physics (Kubiznak)
PSI 2019/2020  Classical Physics (Kubiznak) 
Dynamics and Black Hole Imaging
With the advent of black hole imaging, we are now moving forward to black hole cinema. This workshop aims to collect the expertise across the Event Horizon Telescope Collaboration to develop, implement and apply methods to access and interpret variability in M87 and Sgr A*. The goal is to lay the foundation for the first publications based on black hole movies.

PSI 2018/2019  Strong Field Gravity (East)
PSI 2018/2019  Strong Field Gravity (East) 
PSI 2018/2019  Explorations in Quantum Gravity (Dupuis)
PSI 2018/2019  Explorations in Quantum Gravity (Dupuis) 
Path to Kilohertz GravitationalWave Astronomy
We are entering an exponentially growing phase of gravitationalwave (GW) astronomy excitingly represented by the Nobel Prize in Physics last year  only two years after the first detection. The successful multimessenger detection of binary neutron star merger in last August has triggered increasing interests to probe the neutron star postmerger gravitational radiations as they will give more decisive and informative description of the postmerger object itself and the GW/electromagnetic emission mechanism. As the postmerger GWs mainly lie in the 1kHz4kHz band it becomes necessary and important to think about possible thirdgeneration GW detectors that are primarily sensitive to the high frequency band.Â In this workshop we shall focus on possible science case and detector configuration for kHz highfrequency detectors. We will have several invited talks while leaving more time for free discussions. We hope this workshop can serve as a seed for much broader discussions in the GW astronomy community and help promote high frequency detectors as one of the development directions of thirdgeneration GW detectors.

Searching for New Particles with Black Hole Superradiance
Black hole superradiance is a fascinating process in general relativity and a unique window on ultralight particles beyond the standard model. Bosons  such as axions and dark photons  with Compton wavelengths comparable to size of astrophysical black holes grow exponentially to form large clouds spinning down the black hole in the process and produce monochromatic continuous gravitational wave radiation. In the era of gravitational wave astronomy and increasingly sensitive observations of astrophysical black holes and their properties superradiance of new light particles is a promising avenue to search for new physics in regimes inaccessible to terrestrial experiments. This workshop will bring together theorists data analysts and observers in particle physics gravitational wave astronomy strong gravity and high energy astrophysics to explore the signatures of black hole superradiance and to study the current and future possibilities of searching for new particles with black holes.

PSI 2017/2018  Quantum Gravity (Dupuis)
PSI 2017/2018  Quantum Gravity (Dupuis) 
Computational Methods for General Relativistic Magnetohydrodynamics: con2prim an
Computational Methods for General Relativistic Magnetohydrodynamics are important means of studying compact astrophysical objects such as neutron stars and corecollapse supernovae relevant e.g. to understand sources of gravitational radiation.Particular crucial elements of such methods including solving nonlinear equations to extract the microphysical state from the conserved fluxes (endearingly called con2prim) or handling realistic equations of state (EOS) that are only given approximately in a tabulated manner. The state of the art for algorithms addressing these issue leaves to be desired and significantly limits stabilityaccuracy and performance of todays calculations.This workshop aims to review the known algorithmic and computational shortcomings list requirements that an ideal solution should haveand discuss potential practical solutions.

The Path Integral for Gravity
Over the past three decades, the idea of a path integral over geometries, describing gravity in various dimensions, has become increasingly central to many areas of theoretical physics, including string and Mtheory, holography and quantum aspects of black holes and cosmology.
In each of these areas, the path integral is frequently invoked as a formal device although, as practitioners will admit, except in very special cases the basic formula remains undefined. Typically, classical saddle points are discussed, whether real or complex, but the required integrals are left unperformed.
This state of affairs is untenable because it leaves the theory on a shaky footing and hence does not permit a sound comparison of theoretical predictions with observations. The time has come to critically reassess the foundational ideas of the path integral for gravity, including its definition, evaluation and interpretation; to identify problems with
existing uses and claims based on it, and to seek improvements. The workshop will focus on the continuum theory and its semiclassical limit, with applications to cosmology, black holes and holography. In particular, the notion of a “Euclidean path integral” for a “wavefunction of the universe” will be addressed.To this effect we intend to revisit discussion of “quantum geometrodynamics” from the path integral viewpoint and to pursue various applications. The developments in this direction that took place in the late 1970's and early 1980's were not incorporated in subsequent efforts, where the emphasis shifted to using a classical background with quantum fluctuations superimposed on it, a split which although useful in particular approximations can hardly be imagined to lie at the foundation of the theory. The revival of the discussion of the foundation of the path integral for gravity is made timely, we believe, by the introduction of new global methods such as PicardLefschetz theory.
The format of the workshop will be unusual. For the first three days, the mornings will begin with a longer, introductory lecture by each of the three organisers, setting out some of the foundational issues. This will be followed by shorter lectures by the participants, tackling the same foundational questions. The morning lectures, held in the Bob room, will be open to all Perimeter residents and visitors. They will be recorded and made available for viewing on PIRSA. Afternoons will be devoted to friendly and informal discussions, with participants invited to offer short contributions which follow up or develop points raised in the mornings, within a relaxed and highly conducive environment. Participation in these afternoon discussion sessions, as well as social events associated with the workshop, will be limited to registered workshop participants. The last two days of the workshop will be an opportunity for participants to continue discussions on topics which emerge as of greatest general interest, as well as to follow up in smaller groups on technical points or new ideas.