# 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.

## Dark Insights from Light - Cosmology and the CMB

Monday Mar 07, 2005
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The cosmic microwave background (CMB) is our most direct cosmological observable, encoding critical information about the evolution and development of the universe. The Wilkinson Microwave Anisotropy Probe (WMAP) has measured the angular power spectrum of the CMB temperature and temperature-polarization power spectra with unprecedented accuracy from its first year in flight.

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## From Einstein to Quantum Information

Wednesday Mar 02, 2005
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Anton Zeilinger, a renowned physicist who successfully teleported light particles, will explain how quantum properties are used today to process and transmit information. Anton Zeilinger, Einstein, quantum information, quantum physics, entanglement, cryptography, quantum mechanics, teleportation, quantum computer

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## Enigmas in Galaxy Formation

Tuesday Mar 01, 2005
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Understanding how galaxies form is a major current goal in physical cosmology: although a basic picture is well-accepted, there are outstanding mysteries to be solved. First, what is the origin of the heavy elements seen outside of galaxies? Given that these elements are created only inside galaxies, there must be a process whereby galaxies can expel gas rather than accrete it. Second, galaxy properties are somewhat different from theory predicts, yet extremely regular -- to the extent that it has been seriously argued that modified gravity, rather than dark matter, explains them.

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## Interpretation of Quantum Theory: Lecture 15

Tuesday Mar 01, 2005
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## Geometry of Fast Moving Strings

Tuesday Mar 01, 2005
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It was conjectured that the N=4 Yang-Mills perturbation theory in the sector with large R charges corresponds to considering the classical string worldsheets in $AdS_5imes S^5$ as perturbations of the null-surfaces. We discuss this perturbation theory with a special emphasis on a hidden symmetry.

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## Eternal Inflation Multiple Universes and other Dark Matters

Monday Feb 28, 2005
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## A Unified Picture of Decoherence Control

Wednesday Feb 23, 2005
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## Particle physics in canada: present and future

Wednesday Feb 23, 2005
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## Fermions from Half-BPS Supergravity

Wednesday Feb 23, 2005
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We discuss collective coordinate quantization of the half-BPS geometries of Lin, Lunin and Maldacena (hep-th/0409174). The LLM geometries are parameterized by a single function u on a plane. We treat this function as a collective coordinate. We arrive at the collective coordinate action as well as path integral measure by considering D3 branes in an arbitrary LLM geometry. The resulting functional integral is shown, using known methods (hep-th/9309028), to be the classical limit of a functional integral for free fermions in a harmonic oscillator.

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## On charged black holes in AdS space

Tuesday Feb 22, 2005
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