# Video Library

Since 2002 Perimeter Institute has been recording seminars, conference talks, and public outreach events 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 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.

## Quantum Field Theory for Cosmology (AMATH872/PHYS785) - Lecture 14

Tuesday Feb 27, 2018
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## Projective symmetry of partons in the Kitaev honeycomb model

Tuesday Feb 27, 2018
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Low-energy states of quantum spin liquids are thought to involve partons living in a gauge-field background. We study the spectrum of Majorana fermions of the Kitaev honeycomb model on spherical clusters. The gauge field endows the partons with half-integer orbital angular momenta. As a consequence, the multiplicities do not reflect the point-group symmetries of the cluster, but rather its projective symmetries, operations combining physical and gauge transformations. The projective symmetry group of the ground state is the double cover of the point group.

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## Modular Berry Connection

Tuesday Feb 27, 2018
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States of a CFT's subregions are consistent with a given global state. For a holographic CFT, this amounts to different entanglement wedges being patches of the same geometry. What relations between them make this possible?

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## PSI 2017/2018 - Beyond Standard Model - lecture 3

Tuesday Feb 27, 2018
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Dimension five and six SM operators.

## PSI 2017/2018 - Quantum Information - Lecture 6

Tuesday Feb 27, 2018
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Oracle model, Deutsch-Josza algorithm

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## Quantum Black Holes in the Sky: from Quantum Gravity to Astrophysics and Cosmology

Tuesday Feb 27, 2018
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In classical General Relativity (GR), an observer falling into an astrophysical black hole (BH) is not expected to experience anything dramatic as she crosses the event horizon. However, tentative resolutions to problems in quantum gravity, such as the cosmological constant problem or the black hole information paradox, invoke significant departures from classicality in the vicinity of the horizon. I outline theoretical and phenomenological arguments for these departures.

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## PSI 2017/2018 - String Theory - Lecture 6

Tuesday Feb 27, 2018
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Ghosts in string theory - BRST-symmetric path integral for a bosonic string.

## PSI 2017/2018 - Beyond Standard Model - Lecture 2

Tuesday Feb 27, 2018
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Effective field theory. Special properties of the SM.

## The wonderful compactication and the universal centralizer

Monday Feb 26, 2018
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Let $G$be a complex semisimple algebraic group of adjoint type and $\overline{G}$ the wonderful compacti

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## PSI 2017/2018 - Quantum Information - Lecture 5

Monday Feb 26, 2018
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Complexity theory, Church-Turing thesis

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## Next Public Lecture

### INGRID WALDRON, DALHOUSIE UNIVERSITY

Tuesday Apr 24, 2018

## RECENT PUBLIC LECTURE

### Rob Moore: Stanford Institute for Materials and Energy Sciences

Speaker: Rob Moore