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. 

  

 

Thursday Feb 26, 2015
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Wednesday Feb 25, 2015
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From the general difficulty of simulating quantum systems using classical systems, and in particular the existence of an efficient quantum algorithm for factoring, it is likely that quantum computation is intrinsically more powerful than classical computation. At present, the best upper bound known for the power of quantum computation is that BQP is in AWPP, where AWPP is a classical complexity class (known to be included in PP, hence PSPACE). This work investigates limits on computational power that are imposed by simple physical, or information theoretic, principles.

 

Wednesday Feb 25, 2015
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Shape Dynamics is a theory of gravity which replaces relativity of simultaneity for spatial conformal invariance, maintaining the same degree of symmetry of General Relativity while avoiding some of its shortcomings.

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Wednesday Feb 25, 2015
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Wednesday Feb 25, 2015
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Wednesday Feb 25, 2015
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Tuesday Feb 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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Tuesday Feb 24, 2015
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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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Tuesday Feb 24, 2015
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Tuesday Feb 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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