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# Video Library

Since 2002 Perimeter Institute has been recording seminars, conference talks, public outreach events such as talks from top scientists using video cameras installed in our lecture theatres.  Perimeter now has 7 formal presentation spaces for its many scientific conferences, seminars, workshops and educational outreach activities, all with advanced audio-visual technical capabilities.

Recordings of events in these areas are all available and On-Demand from this Video Library and on Perimeter Institute Recorded Seminar Archive (PIRSA)PIRSA is a permanent, free, searchable, and citable archive of recorded seminars from relevant bodies in physics. This resource has been partially modelled after Cornell University's arXiv.org.

Accessibly by anyone with internet, Perimeter aims to share the power and wonder of science with this free library.

## Unification of integrability in supersymmetric gauge theories

Lundi oct 22, 2018
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The 8-vertex model and the XYZ spin chain have been found to emerge from gauge theories in various ways, such as 4d and 2d Nekrasov-Shatashvili correspondences, the action of surface operators on the supersymmetric indices of class-Sk theories, and correlators of line operators in 4d Chern-Simons theory.  I will explain how string theory unifies these phenomena.  This is based on my work with Kevin Costello [arXiv:1810.01970].

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## Positive geometries and the amplituhedron

Lundi oct 22, 2018

Positive geometries are real semialgebraic spaces that are
equipped with a meromorphic canonical form" whose residues reflect
the boundary structure of the space.  Familiar examples include
polytopes and the positive parts of toric varieties.  A central, but
conjectural, example is the amplituhedron of Arkani-Hamed and Trnka.
In this case, the canonical form should essentially be the tree
amplitude of N=4 super Yang-Mills.

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## PSI 2018/2019 - Statistical Mechanics - Lecture 8

Lundi oct 22, 2018
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## PSI 2018/2019 - Quantum Field Theory I - Lecture 8

Lundi oct 22, 2018
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## Computational Physics - Lecture 12

Vendredi oct 19, 2018
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## PSI 2018/2019 - Statistical Mechanics - Lecture 7

Vendredi oct 19, 2018
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## PSI 2018/2019 - Quantum Field Theory I - Lecture 7

Vendredi oct 19, 2018
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## A Song of Ice and Fire --- Dynamics of Planets Hot and Cold

Jeudi oct 18, 2018
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The unexpected diversity of planetary systems has posed challenges to our classical understanding of planetary formation. For instance, Jupiter sized planets have been detected with short orbital periods of a few days in misaligned orbits with respect to the spin-axis of their host stars. I will first describe the statistical implication of detecting misaligned hot Jupiters and will suggest how dynamical interactions between an outer perturber and the inner planet, can naturally lead to the formation of such misaligned hot Jupiters.

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## PSI 2018/2019 - Statistical Mechanics - Lecture 6

Jeudi oct 18, 2018
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## Entanglement structure of current driven diffusive fermion systems

Jeudi oct 18, 2018

Applying a chemical potential bias to a conductor drives the system out of equilibrium into a current carrying non-equilibrium state.  This current flow is associated with entropy production in the leads, but it remains poorly understood under what conditions the system is driven to local equilibrium by this process.  We investigate this problem using two toy models for coherent quantum transport of diffusive fermions:  Anderson models in the conducting phase and a class of random quantum circuits acting on a chain of qubits, which exactly maps to an interacting fermion problem.

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## Next Public Lecture

### JOCELYN BELL BURNELL: UNIVERSITY OF OXFORD

Jeudi oct 25, 2018

## LECTURES ON-DEMAND

### Avery Broderick: Perimeter Institute and University of Waterloo

Speaker: Avery Broderick