Format results
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Gravitational-wave observations of compact binary mergers
Patricia Schmidt - University of Birmingham
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The Noether Theorems: Then and Now
Karen Uhlenbeck - The University of Texas at Austin
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Astrophysical Lessons from LIGO-Virgo's Black Holes
Maya Fishbach - University of Toronto
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The Black Hole Information Paradox in the Age of Holographic Entanglement Entropy
Netta Engelhardt - Massachusetts Institute of Technology (MIT)
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Anomaly-free special Weyl symmetry and particle physics
Mikhail Shaposhnikov - L'Ecole Polytechnique Federale de Lausanne (EPFL)
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Learning Symbolic Equations with Deep Learning
Shirley Ho - Flatiron Institute
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The Theory, Practice, and Sociology of Physical Cosmology
James Peebles - Princeton University
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The Story of Anyons
Steve Simon - University of Oxford - Rudolf Peierls Centre for Theoretical Physics
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Quantum many-body topology of crystals and quasicrystals
Dominic Else - Perimeter Institute for Theoretical Physics
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Intellectual Property
Paul Smith - Perimeter Institute for Theoretical Physics , Michael Henry
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Gravitational-wave observations of compact binary mergers
Patricia Schmidt - University of Birmingham
The first direct detection of gravitational waves from merging black holes in 2015 has opened up new avenues to studying gravity in the strong-field regime, inferring the mass and spin distributions of astrophysical black holes and probing the nature of ultra-dense nuclear matter in the interior of… -
The Noether Theorems: Then and Now
Karen Uhlenbeck - The University of Texas at Austin
The 1918 Noether theorems were a product of the general search for energy and momentum conservation in Einstein’s newly formulated theory of general relativity. Although widely referred to as the connection between symmetry and conservation laws, the theorems themselves are often not understood… -
Astrophysical Lessons from LIGO-Virgo's Black Holes
Maya Fishbach - University of Toronto
LIGO and Virgo have observed over 80 gravitational-wave sources to date, including mergers between black holes, neutron stars, and mixed neutron star- black holes. The origin of these merging neutron stars and black holes -- the most extreme objects in our Universe -- remains a mystery, with… -
The Black Hole Information Paradox in the Age of Holographic Entanglement Entropy
Netta Engelhardt - Massachusetts Institute of Technology (MIT)
The black hole information paradox — whether information escapes an evaporating black hole or not — remains one of the greatest unsolved mysteries of theoretical physics. The apparent conflict between validity of semiclassical gravity at low energies and unitarity of quantum mechanics has long been… -
Anomaly-free special Weyl symmetry and particle physics
Mikhail Shaposhnikov - L'Ecole Polytechnique Federale de Lausanne (EPFL)
What is the global symmetry of Nature? In the absence of gravity, the most obvious answer to this question is given by special relativity and is associated with the Poincare transformations. As was noted a long time ago, the free Maxwell equations have a wider symmetry group - the 15 parameters… -
Learning Symbolic Equations with Deep Learning
Shirley Ho - Flatiron Institute
We develop a general approach to "interpret" what a network has learned by introducing strong inductive biases. In particular, we focus on Graph Neural Networks. The technique works as follows: we first encourage sparse latent representations when we train a GNN in a supervised setting, then we… -
The Theory, Practice, and Sociology of Physical Cosmology
James Peebles - Princeton University
Sociologists have interesting things to say about the practice of natural science. I will discuss the sociological phenomenon of multiples in scientific discoveries, with examples drawn from how the ΛCDM cosmology grew, and examples of possible multiple discoveries to come from issues arising in our… -
The Story of Anyons
Steve Simon - University of Oxford - Rudolf Peierls Centre for Theoretical Physics
I will review the history of anyons, particles that are neither bosons nor fermions, starting with their theoretical proposal all the way to their definitive experimental observation over 40 years later. I will further discuss why the more general idea of non-abelian anyons is of intense interest… -
Quantum many-body topology of crystals and quasicrystals
Dominic Else - Perimeter Institute for Theoretical Physics
When an interacting quantum many-body system is cooled down to its ground state, there can be discrete "topological invariants" that characterize the properties of such ground states. This leads to the concept of "topological phases of matter" distinguished by these topological invariants… -
Intellectual Property
Paul Smith - Perimeter Institute for Theoretical Physics , Michael Henry
Understanding IP ownership and ensuring that commercialization of research provides broad societal and economic benefit both in Canada and abroad is extremely important. Perimeter Institute is also acutely aware that entrepreneurial oriented faculty and graduate students want to engage in commercial… -
Life is What?
Sara Walker - Arizona State University
Currently, no general theory exists that explains what life is. While many definitions for life do exist, these are primarily descriptive, not predictive, and they have so far proved insufficient to explain the origins of life, or to provide rigorous constraints on what properties we might expect… -
Failure of the split property in gravity and the information paradox
In an ordinary quantum field theory, the "split property" implies that the state of the system can be specified independently on a bounded subregion of a Cauchy slice and its complement. This property does not hold for theories of gravity, where observables near the boundary of the Cauchy slice…