Format results

39 talksCollection Number C18015
Talk

Low Energy Challenges for High Energy Physicists 3
16 talksCollection Number C18013Talk

Emergent Gravity From Relatively Local Hamiltonians
SungSik Lee McMaster University

Strange Metals From Local Quantum Chaos
John McGreevy University of California, San Diego
PIRSA:18060028 


Holographic Solids: Transverse Phonons and Elastic Response
Lasma Alberte International School for Advanced Studies
PIRSA:18060031 
Particle Physics Beyond Colliders
Asimina Arvanitaki Perimeter Institute for Theoretical Physics
PIRSA:18060032 



Path to Kilohertz GravitationalWave Astronomy
17 talksCollection Number C18014Talk


Hitting the High Notes: The High Frequency Dynamics of Neutron Star Mergers
William East Perimeter Institute for Theoretical Physics
PIRSA:18060045 
PostMerger Gravitational Wave Emission
Andreas Bauswein Max Planck Institute for Astrophysics (MPA), Garching
PIRSA:18060046 
Searching for Ultralight Particles with Gravitational Waves
Masha Baryakhtar University of Washington
PIRSA:18060047 
3G Detectors, Voyager
Rana Adhikari California Institute of Technology (Caltech)  Division of Physics Mathematics & Astronomy
PIRSA:18060048 
Discussion Session
PIRSA:18060049 
Gravitational Wave Telescopes: Some Cosmological Considerations
Latham Boyle University of Edinburgh
PIRSA:18060050 
Astrophysics and Cosmology with GravitationalWave Population Inference
Eric Thrane Monash University  Department of Physics
PIRSA:18060051


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 
Career Trajectories Day
2 talksCollection Number C18009Talk

Searching for New Particles with Black Hole Superradiance
11 talksCollection Number C18010Talk

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
PIRSA:18050028 
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


PINRC Meeting
11 talksCollection Number C18011Talk


Attosecond Quantum Spectroscopy Measurement
David Villeneuve National Research Council Canada (NRC)

Efficient Preparation of Nontrivial Quantum States
Timothy Hsieh Perimeter Institute for Theoretical Physics

Time And Gravity Measurement
Pierre Dube National Research Council Canada (NRC)


Canadian Astronomy Data Center: Tools and Analytics for Large Data Sets
Sebastien Fabbro National Research Council Canada (NRC)


SI Unit Fundamental Measurements

Angela Gamouras National Research Council Canada (NRC)

Barry Wood National Research Council Canada (NRC)
PIRSA:18050045 


New Directions in Conventional and Ambitwistor String Theories
1 talkCollection Number C18008Talk

Scattering Amplitudes, String Models and Gravitational Waves
Ricardo Monteiro Queen Mary University of London


Algorithmic Information, Induction and Observers in Physics
17 talksCollection Number C18007Talk


Quantum speedup in testing causal hypotheses
Giulio Chiribella The University of Hong Kong (HKU)

The Logic of Physical Law
Stefan Wolf Università della Svizzera italiana


On the concepts of universality in physics and computer science
Gemma De Las Cuevas Universität Innsbruck

A nogo theorem for observerindependent facts
Časlav Brukner Institute for Quantum Optics and Quantum Information (IQOQI)  Vienna


Algorithmic information theory: a critical perspective
Tom Sterkenburg LudwigMaximiliansUniversitiät München (LMU)


Observers in Quantum and Foil Theories
11 talksCollection Number C18006Talk

Wavefunction branches as a foundation for constructing foil theories
Jess Riedel NTT Research
PIRSA:18040082 
Compatibility of implicit and explicit observers in quantum theory and beyond
Thomas Galley Institute for Quantum Optics and Quantum Information (IQOQI)  Vienna
PIRSA:18040084 
From observers to physics via algorithmic information theory I
Markus Müller Institute for Quantum Optics and Quantum Information (IQOQI)  Vienna
PIRSA:18040078 
From observers to physics via algorithmic information theory II
Markus Müller Institute for Quantum Optics and Quantum Information (IQOQI)  Vienna
PIRSA:18040080 
Motility of the internalexternal cut as a foundational principle
Robert Spekkens Perimeter Institute for Theoretical Physics
PIRSA:18040073 

Quantum theory cannot consistently describe the use of itself
Renato Renner ETH Zurich
PIRSA:18040085 


Open Research: Rethinking Scientific Collaboration
11 talksCollection Number C18005Talk


Data Mists, Blockchain Republics, and the Moon Shot
Simon DeDeo Indiana University

Like penguins on an ice floe: The scary business of adopting open science practices
Benedikt Fecher Alexander von HumboldtStiftung

Collaborative Knowledge Ratchets and Fermat's Library

Jess Riedel NTT Research

Luis Batalha Fermat's Library
PIRSA:18030101 


What’s not to like? Open science will fail unless it takes the costs seriously
Rosie Redfield University of British Columbia




TriInstitute Summer School on Elementary Particles 2018
39 talksCollection Number C18015The 2018 TriInstitute Summer School on Elementary Particles (TRISEP) will be held July 920 2018 in Perimeter Institute for Theoretical Physics Waterloo ON, Canada. TRISEP is an international summer school organized jointly by the Perimeter Institute for Theoretical Physics, SNOLAB, and TRIUMF Canada s laboratory for particle and nuclear physics. TRISEP will feature lectures by leading experts in the field of particle physics in its broadest sense and is designed to be very interactive with ample time for questions, discussions and interaction with the speakers. The school is intended for graduate students of all levels who were already exposed to quantum field theory. For further information, please visit http:///.trisep.ca

Low Energy Challenges for High Energy Physicists 3
16 talksCollection Number C18013Throughout the history of quantum field theory there has been a rich crosspollination between high energy and condensed matter physics. From the theory of renormalization to the consequences of spontaneous symmetry breaking this interaction has been an incredibly fruitful one. In the last decade there has been a strong resurgence of interest in condensed matter systems in the high energy theoretical physics community. Taking advantage of developments in conformal field theories the conformal bootstrap gauge/gravity and other type of dualities as well as effective field theory techniques high energy theorists with all kinds of specialist backgrounds are thinking about the diverse behavior exhibited in low energy physical systems. Recent developments also employed quantum field theory ideas to improve our understanding of condensed and quantum matter systems as for example Femi liquids strange metals or the behavior of topological defects in ultra cold atom gases. For certain questions such approaches present relevant advantages with respect to more traditional techniques. Moreover in recent years the interplay between high energy and condensed matter physics found new fuel in the search for light dark matter. Indeed theoretical analyses have recently shifted the attention towards model for subGeV dark matter. The condensed matter community has played a crucial role in the design of possible new materials and detectors that could allow the observation of such particles. The aim of this workshop is to bring together likeminded high energy theorists with appropriate condensed matter theorists and experimentalists to tackle some of the most interesting problems in modern physics. The format has been designed to allow for plenty of time for open discussion and interaction between the participants. This will reinvigorate existing collaborations as well as create new fruitful ones.

Path to Kilohertz GravitationalWave Astronomy
17 talksCollection Number C18014We 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.

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.

Career Trajectories Day
2 talksCollection Number C18009What can you do with a Physics degree? Plenty although the reality is that most people being trained in physics at the undergraduate graduate or even postdoctoral levels aren't aware of the broad spectrum of opportunities available to them. The problem solving skills necessary to succeed in physics are sought after in a wide range of technology financial and industrial sectors. This day will bring together current students and postdocs in theoretical physics with former students who have found great success in a wide range of different areas from startups to big companies finance and even bestselling novels. Many of them were affiliated with Perimeter Institute and chose their career paths over opportunities in academia. Through a combination of talks and panel sessions this day will showcase the many career possibilities available to young physicists steps they can take to explore these options and how to avoid the inevitable pitfalls. Lunch will be provided and there will ample opportunities to ask questions and network.

Searching for New Particles with Black Hole Superradiance
11 talksCollection Number C18010Black 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.

PINRC Meeting
11 talksCollection Number C18011 
New Directions in Conventional and Ambitwistor String Theories
1 talkCollection Number C18008The goal of the workshop is to foster interaction between researchers working on the Smatrices of conventional strings and on ambitwistor strings. The workshop will exploit synergies between the two frameworks and identify the current key questions in the fields and areas that can benefit from collaboration. The program of the workshop will be tailored to questions and problems raised by the participants in the runup to the event. The goal is to spend most of the time on collaborative discussions in order to exchange expertise and to attempt to resolve questions during the workshop. A list of such problems can be found below and this will be extended by the participants in the runup to the meeting. To obtain ambitwistor integrands and BernCarrascoJohansson (BCJ) numerators for multiloop amplitudes and to connect with superstring worldsheet correlators. To develop fully nonlinear approaches by working on curved backgrounds both for application to AdS/CFT and to problems in perturbative gravity and gauge theory on nontrivial backgrounds. To understand the twistor and ambitwistor geometry underpinning both conventional and ambitwistor strings including the geometry of soft limits infrared structure and its links with formulations at null infinity. To explore mathematical structures behind the integrals of conventional and ambitwistor strings (positive geometries and canonical forms twisted (co)cycle etc.)

Algorithmic Information, Induction and Observers in Physics
17 talksCollection Number C18007Our universe is of astonishing simplicity: almost all physical observations can in principle be described by a few theories that have short mathematical descriptions. But there is a field of computer science which quantifies simplicity namely algorithmic information theory (AIT). In this workshop we will discuss emerging connections between AIT and physics some of which have recently shown up in fields like quantum information theory and thermodynamics. In particular AIT and physics share one goal: namely to predict future observations given previous data. In fact there exists a gold standard of prediction in AIT called Solomonoff induction which is also applied in artificial intelligence. This motivates us to look at a broader question: what is the role of induction in physics? For example can quantum states be understood as Bayesian states of belief? Can physics be understood as a computation in some sense? What is the role of the observer i.e. the agent that is supposed to perform the predictions? These and related topics will be discussed by a diverse group of researchers from different disciplines.

Observers in Quantum and Foil Theories
11 talksCollection Number C18006Foil theories sometimes called mathematically rigorous science fiction describe ways the world could have been were it not quantum mechanical. Our understanding of quantum theory has been deepened by contrasting it with these alternatives. So far observers in foil theories have only been modeled implicitly for example via the recorded probabilities of observing events. Even when multiagent settings are considered these agents tend to be compatible in the classical sense that they could always compare their observations. Scenarios where agents and their memories are themselves modeled as physical systems within the theory (and could in particular measure each other as in Wigner's friend experiment) have not yet been considered. In this workshop we will investigate which foil theories allow for the existence of explicit observers and whether they allow for paradoxes in multiagent settings such as those found in quantum theory. We will also investigate which interpretations of quantum theory would equally well interpret the foil theories and which interpretations are truly quantum. We will gain a deeper understanding of how this can happen by discussing appropriate definitions observers in these theories and seeing how such observers learn about their environment.

Open Research: Rethinking Scientific Collaboration
11 talksCollection Number C18005Scientific inquiry in the 21st century is beset with inefficiencies: a flood of papers not read theories not tested and experiments not repeated; a narrow research agenda driven by a handful of highimpact journals; a publishing industry that turns public funding into private profit; the exclusion of many scientists particularly in developing countries from cuttingedge research; and countless projects that are not completed for lack of skilled collaborators. These are all symptoms of a major communication bottleneck within the scientific community; the channels we rely on to share our ideas and findings especially peerreviewed journal articles and conference proceedings are inadequate to the scale and scope of modern science. The practice of open research doing science on a public platform that facilitates collaboration feedback and the spread of ideas addresses these concerns. Opensource science lowers barriers to entry catalyzing new discoveries. It fosters the realtime sharing of ideas across the globe favoring cooperative endeavor and complementarity of thought rather than wasteful competition. It reduces the influence of publishing monopolies enabling a new credit attribution model based on contributions made rather than references accrued. Overall it democratizes science while creating a new standard of prestige: quality of work instead of quantity of output. This workshop will bring together a diverse group of researchers from fields as diverse as physics biology computer science and sociology committed to opensource science. Together we will review the lessons learnt from various pioneering initiatives such as the Polymath project and Data for Democracy. We will discuss the opportunity to build a new tool similar to the software development platform GitHub to enable online collaborative science. We will consider the challenges associated with the adoption of such a tool by our peers and discuss ways to overcome them. Finally we will sketch a roadmap for the actual development of that tool.