# 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.

## PSI 2018/2019 - Explorations in Quantum Gravity - Lecture 12

Tuesday Mar 19, 2019
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## PSI 2018/2019 - Strong Field Gravity - Lecture 12

Tuesday Mar 19, 2019
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## Principal Bundles in Diophantine Geometry

Monday Mar 18, 2019
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Principal bundles and their moduli have been important in various aspects of physics and geometry for many decades. It is perhaps not so well-known that a substantial portion of the original motivation for studying them came from number theory, namely the study of Diophantine equations. I will describe a bit of this history and some recent developments.

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## PSI 2018/2019 - Quantum Field Theory III - Lecture 14

Monday Mar 18, 2019
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Chiral anomaly in the Schwinger model

## Twisted 3d supersymmetric gauge theories and the enumerative geometry of quasi-maps

Monday Mar 18, 2019

I discuss a geometric interpretation of the twisted indexes of 3d (softly broken) $\cN=4$ gauge theories on $S^1 \times \Sigma$ where $\Sigma$ is a closed genus $g$ Riemann surface, mainly focussing on quivers with unitary gauge groups. The path integral localises to a moduli space of solutions to generalised vortex equations on $\Sigma$, which can be understood algebraically as quasi-maps to the Higgs branch. I demonstrate that the twisted indexes computed in previous work reproduce the virtual Euler characteristic of the moduli spaces of twisted quasi-maps.

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## PSI 2018/2019 - Quantum Information Review - Lecture 11

Monday Mar 18, 2019
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Quantum error correcting codes. 3-qubit and 9-qubit codes.

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## PSI 2018/2019 - Explorations in Quantum Gravity - Lecture 11

Monday Mar 18, 2019
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The Flatness constraint - the physical Hibert space

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## PSI 2018/2019 - Strong Field Gravity - Lecture 11

Monday Mar 18, 2019
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## Topological Holography Course - Lecture 5

Friday Mar 15, 2019
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## The Standard Model Effective Field Theory, and the Higgs

Friday Mar 15, 2019
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The discovery of a Higgs like boson at LHC in 2012 was a development of fundamental importance in particle physics.

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## Next Public Lecture

### CHAD HANNA: PENNSYLVANIA STATE UNIVERSITY

Wednesday Apr 03, 2019