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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. 

  

 

Mardi fév 24, 2015
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The analogy between Multi-scale Entanglement Renormalization

Ansatz (MERA) and the spatial slice of three-dimensional anti-de

Sitter space (AdS3) has motivated a great interest in tensor networks

among holographers. I discuss a way to promote this analogy to a

rigorous, quantitative, and constructive relation. A key quantitative

ingredient is the way the strong subadditivity of entanglement entropy

is encoded in MERA and in a holographic spacetime. The upshot is that

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Mardi fév 24, 2015
Speaker(s): 

We introduce and systematically study an expansive class of "orbifold Higgs" theories in which the weak scale is protected by accidental symmetries arising from the orbifold reduction of continuous symmetries. The protection mechanism eliminates quadratic sensitivity of the Higgs mass to higher scales at one loop (or more) and does not involve any new states charged under the Standard Model.

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Mardi fév 24, 2015
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Mardi fév 24, 2015
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An exciting and largely unexplored frontier in observational and theoretical cosmology is to understand the properties of the universe between 400,000 years and one billion years after the big bang. Notably, the first galaxies formed in this time period, perhaps a few hundred million years after the big bang. These galaxies strongly influenced the gas in their surroundings as well as the formation of subsequent generations of galaxies. The early galaxies emitted ultraviolet light and ionized "bubbles" of hydrogen gas around them.

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Mardi fév 24, 2015
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Mardi fév 24, 2015
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Lundi fév 23, 2015
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Lundi fév 23, 2015
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As an alternative to the Holographic Renormalization procedure, we

introduce a regularization scheme for AdS gravity based on the addition

boundary terms which are a given polynomial of the extrinsic and

intrinsic curvatures (Kounterterms).

Since these terms are closely related to either topological invariants

or Chern-Simons densities in the corresponding dimension, they can be

easily generalized to other gravity theories (Einstein-Gauss-Bonnet,

Lovelock, etc.).

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Lundi fév 23, 2015
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Lundi fév 23, 2015
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