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Fitting models to data using Markov Chain Monte Carlo
Dustin Lang Perimeter Institute for Theoretical Physics
PIRSA:23010076 -
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Topological quantum matter and quantum computing
Tsung-Cheng Lu (Peter) University of Maryland, College Park
PIRSA:23010084 -
Topological quantum matter and quantum computing
Tsung-Cheng Lu (Peter) University of Maryland, College Park
PIRSA:23010086
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Numerical Methods Lecture - 230207
Erik Schnetter Perimeter Institute for Theoretical Physics
PIRSA:23020001 -
Numerical Methods Lecture - 230202
Erik Schnetter Perimeter Institute for Theoretical Physics
PIRSA:23020000 -
Numerical Methods Lecture - 230201
Erik Schnetter Perimeter Institute for Theoretical Physics
PIRSA:23020003 -
Numerical Methods Lecture - 230131
Erik Schnetter Perimeter Institute for Theoretical Physics
PIRSA:23010008 -
Numerical Methods Lecture - 230126
Erik Schnetter Perimeter Institute for Theoretical Physics
PIRSA:23010007 -
Numerical Methods Lecture - 230124
Erik Schnetter Perimeter Institute for Theoretical Physics
PIRSA:23010006 -
Numerical Methods Lecture - 230120
Erik Schnetter Perimeter Institute for Theoretical Physics
PIRSA:23010011 -
Numerical Methods Lecture - 230119
Erik Schnetter Perimeter Institute for Theoretical Physics
PIRSA:23010005
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Mathematical Physics Lecture - 230207
Kevin Costello Perimeter Institute for Theoretical Physics
PIRSA:23020005 -
Mathematical Physics Lecture - 230202
Kevin Costello Perimeter Institute for Theoretical Physics
PIRSA:23020004 -
Mathematical Physics Lecture - 230131
Kevin Costello Perimeter Institute for Theoretical Physics
PIRSA:23010018 -
Mathematical Physics Lecture - 230127
Kevin Costello Perimeter Institute for Theoretical Physics
PIRSA:23010021 -
Mathematical Physics Lecture - 230126
Kevin Costello Perimeter Institute for Theoretical Physics
PIRSA:23010017 -
Mathematical Physics Lecture - 230124
Kevin Costello Perimeter Institute for Theoretical Physics
PIRSA:23010016 -
Mathematical Physics Lecture - 230119
Kevin Costello Perimeter Institute for Theoretical Physics
PIRSA:23010015 -
Mathematical Physics Lecture - 230118
Kevin Costello Perimeter Institute for Theoretical Physics
PIRSA:23010022
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Quantum Foundations Lecture - 230206
Lucien Hardy Perimeter Institute for Theoretical Physics
PIRSA:23020017 -
Quantum Foundations Lecture - 230203
Lucien Hardy Perimeter Institute for Theoretical Physics
PIRSA:23020016 -
Quantum Foundations Lecture - 230102
Lucien Hardy Perimeter Institute for Theoretical Physics
PIRSA:23020015 -
Quantum Foundations Lecture - 230130
Lucien Hardy Perimeter Institute for Theoretical Physics
PIRSA:23010055 -
Quantum Foundations Lecture - 230127
Lucien Hardy Perimeter Institute for Theoretical Physics
PIRSA:23010054 -
Quantum Foundations Lecture - 230125
Lucien Hardy Perimeter Institute for Theoretical Physics
PIRSA:23010053 -
Quantum Foundations Lecture - 230123
Lucien Hardy Perimeter Institute for Theoretical Physics
PIRSA:23010052 -
Quantum Foundations Lecture - 230120
Lucien Hardy Perimeter Institute for Theoretical Physics
PIRSA:23010051
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Vortex Moduli
For a long time, the vortex equations and their associated self-dual field theories have provided a class of toy models in condensed matter theory and particle physics. But more recently, vortices (or their avatars such as stable pairs, holomorphic triples/chains, and quasi-maps) have also been attracting increasing interest from the mathematical community, proceeding from their very natural symplectic-geometric interpretation. In various contexts, a prominent role has been played by the moduli spaces of these objects -- they have been investigated from viewpoints such as geometric quantization, localization of supersymmetric gauge theories, geometric group theory and enumerative geometry. On the other hand, several constructions related to the notion of duality in QFT have also relied on vortices and their extensions. Our program is aimed at discussing recent research on vortex moduli (in their different guises, addressing their topology and geometry), as well as showcasing new develo...
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Vortex Moduli
For a long time, the vortex equations and their associated self-dual field theories have provided a class of toy models in condensed matter theory and particle physics. But more recently, vortices (or their avatars such as stable pairs, holomorphic triples/chains, and quasi-maps) have also been attracting increasing interest from the mathematical community, proceeding from their very natural symplectic-geometric interpretation. In various contexts, a prominent role has been played by the moduli spaces of these objects -- they have been investigated from viewpoints such as geometric quantization, localization of supersymmetric gauge theories, geometric group theory and enumerative geometry. On the other hand, several constructions related to the notion of duality in QFT have also relied on vortices and their extensions. Our program is aimed at discussing recent research on vortex moduli (in their different guises, addressing their topology and geometry), as well as showcasing new develo...
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8th Indian Statistical Physics Community Meeting
This is an annual discussion meeting of the Indian statistical physics community attended by scientists, postdoctoral fellows and graduate students, from across the country, working in the broad area of statistical physics.This meeting will be the 8th in the series and will cover all the 8 topics covered at STATPHYS meetings, namely -General and mathematical aspectsRigorous results, exact solutions, probability theory, stochastic field theory, phase transitions and critical phenomena at equilibrium, information theory, optimization, etc.Out-of-equilibrium aspectsDriven systems, transport theory, relaxation and response dynamics, random processes, anomalous diffusion, fluctuation theorems, large deviations, out-of-equilibrium phase transitions, etc.Quantum fluids and condensed matterStrongly correlated electrons, cold atoms, graphene, mesoscopic quantum phenomena, fractional quantum Hall effect, low dimensional quantum field theory, quantum phase transitions, quantum information, entang...
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8th Indian Statistical Physics Community Meeting
This is an annual discussion meeting of the Indian statistical physics community attended by scientists, postdoctoral fellows and graduate students, from across the country, working in the broad area of statistical physics.This meeting will be the 8th in the series and will cover all the 8 topics covered at STATPHYS meetings, namely -General and mathematical aspectsRigorous results, exact solutions, probability theory, stochastic field theory, phase transitions and critical phenomena at equilibrium, information theory, optimization, etc.Out-of-equilibrium aspectsDriven systems, transport theory, relaxation and response dynamics, random processes, anomalous diffusion, fluctuation theorems, large deviations, out-of-equilibrium phase transitions, etc.Quantum fluids and condensed matterStrongly correlated electrons, cold atoms, graphene, mesoscopic quantum phenomena, fractional quantum Hall effect, low dimensional quantum field theory, quantum phase transitions, quantum information, entang...
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Symmetries Graduate School 2023
The goal of this Winter School on Symmetries is to introduce graduate students to the effectiveness of symmetry principles across subjects and energy scales.
From Noether’s celebrated theorem to the development of the standard model of particle physics, from Landau’s to Wilson’s classification of phases of matter and phase transitions, symmetries have been key to 20th century physics. But in the last decades novel and more subtle incarnations of the symmetry principle have shown us the way to unlocking new and unexpected phases of quantum matter, infrared and holographic properties of the quantum gravitational interaction, as well as to advancements in pure mathematics to mention a few.
The Graduate Winter School on Symmetries will introduce students and young researchers to a variety of applications of the symmetry principle. These will be chosen across contemporary research topics in both theoretical physics and mathematics. Our goal is to create a synergistic environment where ideas and techniques can ultimately spread across disciplines. This will be achieved through a combination of mini-courses, colloquia, and discussion sessions led in collaboration with the students themselves.
https://pirsa.org/C23008
Territorial Land AcknowledgementPerimeter Institute acknowledges that it is situated on the traditional territory of the Anishinaabe, Haudenosaunee, and Neutral peoples.
Perimeter Institute is located on the Haldimand Tract. After the American Revolution, the tract was granted by the British to the Six Nations of the Grand River and the Mississaugas of the Credit First Nation as compensation for their role in the war and for the loss of their traditional lands in upstate New York. Of the 950,000 acres granted to the Haudenosaunee, less than 5 percent remains Six Nations land. Only 6,100 acres remain Mississaugas of the Credit land.
We thank the Anishinaabe, Haudenosaunee, and Neutral peoples for hosting us on their land.
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Turbulence: Problems at the Interface of Mathematics and Physics
The interest in turbulent flow goes back many centuries, but progress has been very slow until recently, from the point of view of ab initio theory (starting from the Euler or Navier-Stokes equations). In the 20th century, innumerable applications, e.g., in aeronautics or atmospheric and oceanic circulation, have been a major driving force for progress. In the last eighty years, thanks (a) to the scaling predictions of Kolmogorov in 1941 (K41), (b) to Onsager's 1949 (Ons49) criterion for anomalous energy dissipation, and (c) to Kraichnan's discovery of the inverse energy cascade for 2D turbulence, we have had the beginnings of a theoretical understanding. Furthermore, from experiments and numerical simulations of the last forty years, it is now clear that simple K41 scale invariance is broken and that a turbulent fluid displays multifractal scaling, which has been modelled by using various ad hoc probabilistic models, so far not deduced from the hydrodynamical equations. Recently, th...
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Turbulence: Problems at the Interface of Mathematics and Physics
The interest in turbulent flow goes back many centuries, but progress has been very slow until recently, from the point of view of ab initio theory (starting from the Euler or Navier-Stokes equations). In the 20th century, innumerable applications, e.g., in aeronautics or atmospheric and oceanic circulation, have been a major driving force for progress. In the last eighty years, thanks (a) to the scaling predictions of Kolmogorov in 1941 (K41), (b) to Onsager's 1949 (Ons49) criterion for anomalous energy dissipation, and (c) to Kraichnan's discovery of the inverse energy cascade for 2D turbulence, we have had the beginnings of a theoretical understanding. Furthermore, from experiments and numerical simulations of the last forty years, it is now clear that simple K41 scale invariance is broken and that a turbulent fluid displays multifractal scaling, which has been modelled by using various ad hoc probabilistic models, so far not deduced from the hydrodynamical equations. Recently, th...
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Numerical Methods (2022/2023)
This course teaches basic numerical methods that are widely used across many fields of physics. The course is based on the Julia programming language. Topics include an introduction to Julia, linear algebra, Monte Carlo methods, differential equations, and are based on applications by researchers at Perimeter. The course will also teach principles of software engineering ensuring reproducible results. -
Mathematical Physics (2022/2023)
This course will cover the mathematical structure underlying classical gauge theory. Previous knowledge of differential geometry is not required. Topics covered in the course include: introduction to manifolds, symplectic manifolds, introduction to Lie groups and Lie algebras; deformation quantisation and geometric quantisation; the matematical structure of field theories; scalar field theory; geometric picture of Yang-Mills theory; symplectic reduction. If time permits, we may also look at the description of gauge theory in terms of principal bundles and the topological aspects of gauge theory. -
Standard Model (2022/2023)
Topics will include: Non-abelian gauge theory (aka Yang-Mills theory), the Standard Model (SM) as a particular non-abelian gauge theory (its gauge symmetry, particle content, and Lagrangian, Yukawa couplings, CKM matrix, 3 generations), spontaneous symmetry breaking: global vs local symmetries (Goldstone's Theorem vs Higgs Mechanism; mass generation for bosons and fermions), neutrino sector (including right-handed neutrinos?), effective field theory, Feynman rules (Standard Model propagators and vertices), gauge and global anomalies, strong CP problem, renormalization group (beta functions, asymptotic freedom, quark confinement, mesons, baryons, Higgs instability, hierarchy problem), unexplained puzzles in the SM, and surprising/intriguing aspects of SM structure that hint at a deeper picture. -
Gravitational Physics (2022/2023)
The main objective of this course is to discuss some advanced topics in gravitational physics and its applications to high energy physics. Necessary mathematical tools will be introduced on the way. These mathematical tools will include a review of differential geometry (tensors, forms, Lie derivative), vielbeins and Cartan’s formalism, hypersurfaces, Gauss-Codazzi formalism, and variational principles (Einstein-Hilbert action & Gibbons-Hawking term). Several topics in black hole physics including the Kerr solution, black hole astrophysics, higher-dimensional black holes, black hole thermodynamics, Euclidean action, and Hawking radiation will be covered. Additional advanced topics will include domain walls, brane world scenarios, Kaluza-Klein theory and KK black holes, Gregory-Laflamme instability, and gravitational instantons
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Quantum Foundations (2022/2023)
This course will cover the basics of Quantum Foundations under three main headings. Part I – Novel effects in Quantum Theory. A number of interesting quantum effects will be considered. (a) Interferometers: Mach-Zehnder interferometer, Elitzur-Vaidman bomb tester, (b) The quantum-Zeno effect. (c) The no cloning theorem. (d) Quantum optics (single mode). Hong-Ou-Mandel dip. Part II Conceptual and interpretational issues. (a) Axioms for quantum theory for pure states. (b) Von-Neumann measurement model. * (c) The measurement (or reality) problem. (d) EPR Einstein’s 1927 remarks, the Einstein-Podolsky-Rosen argument. (e) Bell’s theorem, nonlocality without inequalities. The Tirolson bound. (f) The Kochen-Specker theorem and related work by Spekkens (g) On the reality of the wavefunction: Epistemic versus ontic interpretations of the wavefunction and the Pusey-Barrett-Rudolph theorem proving the reality of the wave function. (h) Gleason’s theorem. (i) Interpretations. The landscape of interpretations of quantum theory (the Harrigen Spekkens classification). The de Broglie-Bohm interpretation, the many worlds interpretation, wave-function collapse models, the Copenhagen interpretation, and QBism. Part III Structural issues. (a) Reformulating quantum theory: I will look at some reformulations of quantum theory and consider the light they throw on the structure of quantum theory. These may include time symmetric quantum theory and weak measurements (Aharonov et al), quantum Bayesian networks, and the operator tensor formalism. (b) Generalised probability theories: These are more general frameworks for probabilistic theories which admit classical and quantum as special cases. (c) Reasonable principles for quantum theory: I will review some of the recent work on reconstructing quantum theory from simple principles. (d) Indefinite causal structure and indefinite causal order. Finally I will conclude by looking at (i) the close link between quantum foundations and quantum information and (ii) possible future directions in quantum gravity motivated by ideas from quantum foundations.