# 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.

## Assessment of the particle standard model: An alternative formulation.

Monday Mar 04, 2019
Speaker(s):

An assessment of the particle standard model and an alternative formulation of
the model are presented. An ultraviolet complete particle model is constructed
for the observed particles of the standard model. The quantum field theory
associates infinite derivative entire functions with propagators and vertices, which
make perturbative quantum loops finite and maintain Poincaré invariance and
unitarity of the model. The electroweak model SU(2) X U(1) group is treated as a
broken symmetry group with non-vanishing experimentally determined boson

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## PSI 2018/2019 - Quantum Information Review - Lecture 1

Monday Mar 04, 2019
Speaker(s):

Motivations. Basic gates. Reversible computations.

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## PSI 2018/2019 - Explorations in Quantum Gravity - Lecture 1

Monday Mar 04, 2019
Speaker(s):

Introduction and overview by Bianca Dittrich on the different quantum gravity approaches.

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## PSI 2018/2019 - Strong Field Gravity - Lecture 1

Monday Mar 04, 2019
Speaker(s):
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## On one example of a chiral Lie group

Friday Mar 01, 2019
Speaker(s):

We quantize the Khesin-Zakharevich Poisson-Lie group of pseudo-differential symbols. This is a joint work with A.Linshaw

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## Fusion Hall algebra and shuffle conjectures

Friday Mar 01, 2019
Speaker(s):

The classical Hall algebra of the category of representations of one-loop quiver is isomorphic to the ring of symmetric functions, and Hall-Littlewood polynomials arise naturally as the images of objects. I will talk about a second "fusion" product on this algebra, whose structure constants are given by counting of bundles with nilpotent endomorphisms on P^1 with restrictions at 0, 1 and infinity. The two products together make up a structure closely related to the elliptic Hall algebra.

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## TBA

Friday Mar 01, 2019
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## Connecting affine Yangians with W-algebras

Thursday Feb 28, 2019
Speaker(s):

Alday-Gaiotto-Tachikawa connect instanton counts in gauge theory with conformal blocks for W-algebras. We realize this mathematically by relating q-deformed W-algebras with the affine q-Yangians that control gauge theory, thus offering an affine, q-deformed generalization of the well-known Brundan-Kleshchev construction in type A

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## COHA and AGT for Spiked Instantons

Thursday Feb 28, 2019
Speaker(s):

The well-known AGT correspondence relates $\mathcal{W}_N$-algebras and supersymmetric gauge theories on $\mathbb{C}^2$. Embedding $\mathbb{C}^2$ as a coordinate plane inside $\mathbb{C}^3$, one can associate the COHA to $\mathbb{C}^3$ and derive the corresponding $\mathcal{W}_N$ as a truncation of its Drinfeld double. Building up on Zhao's talk, I will discuss a generalization of this story, where $\mathbb{C}^2$ is replaced by a more general divisor inside $\mathbb{C}^3$ with three smooth components supported on the three coordinate planes.

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## SO(7,7) structure of the SM fermions

Thursday Feb 28, 2019
Speaker(s):

I will describe the relevant representation theory that allows to think of all components of fermions of a single generation of the Standard Model as components of a single Weyl spinor of an orthogonal group whose complexification is SO(14,C). There are then only two real forms that do not lead to fermion doubling. One of these real forms is the split signature orthogonal group SO(7,7). I will describe some exceptional phenomena that occur for the orthogonal groups in 14 dimensions, and then specifically for this real form.

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## Next Public Lecture

### CHAD HANNA: PENNSYLVANIA STATE UNIVERSITY

Wednesday Apr 03, 2019