# 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.

## 13/14 PSI - Explorations in Quantum Information - Lecture 8

Wednesday Mar 26, 2014
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## Introduction to Quantum Field Theory for Cosmology - Lecture 21

Tuesday Mar 25, 2014
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## Far from equilibrium energy flow in quantum critical systems

Tuesday Mar 25, 2014
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We investigate far from equilibrium energy transport in strongly coupled quantum critical systems. Combining results from gauge-gravity duality, relativistic hydrodynamics, and quantum field theory, we argue that long-time energy transport after a local thermal quench occurs via a universal steady-state for any spatial dimensionality. This is described by a boosted thermal state. We determine the transport properties of this emergent steady state, including the average energy flow and its long-time fluctuations.

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## Naturalness and the Weak Gravity Conjecture

Tuesday Mar 25, 2014
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The weak gravity conjecture (WGC) asserts a powerful consistency condition on gauge theories coupled to quantum gravity: an Abelian, long-range force requires a state of charge q and mass m such that q > m/mPl. Failure of this condition implies the existence of stable black hole remnants and is in tension with no-hair theorems. In this paper, we argue that the WGC creates a non- perturbative obstruction to naturalness, which is the notion that dimensionless coefficients should take on O(1) values in the absence of enhanced symmetry.

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## 13/14 PSI - Explorations in String Theory - Lecture 7

Tuesday Mar 25, 2014
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## Cosmic initial conditions and the CMB

Tuesday Mar 25, 2014
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One new frontier in cosmology is the frequency spectrum of the CMB. Future instruments may be precise enough to measure deviations from the nearly-perfect blackbody, measuring a chemical potential and thus probing energy injection at extremely high redshift. I will discuss ($\mu$ and $y$-type) CMB spectral distortions from the dissipation of entropy (isocurvature)-sourced acoustic modes. I will then discuss how a high-energy phase transition could also source such distortions.

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## 13/14 PSI - Explorations in Condensed Matter - Lecture 7

Tuesday Mar 25, 2014
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## 13/14 PSI - Explorations in Quantum Information - Lecture 7

Tuesday Mar 25, 2014
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## 13/14 PSI - Explorations in String Theory - Lecture 6

Monday Mar 24, 2014
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## 13/14 PSI - Explorations in Condensed Matter - Lecture 6

Monday Mar 24, 2014
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## RECENT PUBLIC LECTURE

### The Future of Physics: Kate Lunau in Conversation With Emerging Talent at Perimeter Institute

Speaker: Kate Lunau