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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.

Standard Model-13

Mercredi jan 21, 2015
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Haldane-like antiferromagnetic spin chain in the large anisotropy limit

Mardi jan 20, 2015
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We consider the one dimensional, periodic spin chain with $N$ sites, similar to the one studied by Haldane \cite{hal}, however in the opposite limit of very large anisotropy and small nearest neighbour, anti-ferromagnetic exchange coupling between the spins, which are of large magnitude $s$. For a chain with an even number of sites we show that actually the ground state is non degenerate and given by a superposition of the two Néel states, due to quantum spin tunnelling. With an odd number of sites, the Néel state must necessarily contain a soliton.

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Mirror Theorem between Landau-Ginzburg models

Mardi jan 20, 2015
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In this talk, I will prove the Landau-Ginzburg mirror symmetry conjecture for general quasi-homogenous singularities, i.e., the FJRW theory (LG A-model) of such polynomials is equivalent to the Saito-Givental theory (LG B-model) of the mirror polynomial. This is joint work with Weiqiang He, Rachel Webb and Yefeng Shen.

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Signals of asymmetric dark matter from galactic center pulsar implosions

Mardi jan 20, 2015
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If dark matter is asymmetric, fermionic, and self-interacting, it may form black holes in pulsars at the galactic center. In this case, a measurable maximum attainable pulsar age would track the density of the dark matter halo, with the oldest pulsars being allowed in the least dense parts of the halo. This could explain a recent observation, that there are not as many pulsars in the galactic center as expected.

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Foundations of Quantum Mechanics-13

Mardi jan 20, 2015
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Spinodal Instabilities and Super-Planckian Excursions in Natural Inflation

Mardi jan 20, 2015
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Models such as Natural Inflation that use Pseudo-Nambu-Goldstone bosons (PNGB's) as the inflaton are attractive for many reasons. However, they typically require trans-Planckian field excursions $\Delta \Phi>M_{\rm Pl}$, due to the need for an axion decay constant $f>M_{\rm Pl}$ to have both a sufficient number of e-folds {\em and} values of $n_s,\ r$ consistent with data.

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Gravitational Physics-12

Mardi jan 20, 2015
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Standard Model-12

Mardi jan 20, 2015
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Foundations of Quantum Mechanics-12

Lundi jan 19, 2015
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Foundations of Quantum Mechanics-11

Lundi jan 19, 2015
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Next Public Lecture

KENDRICK SMITH, PERIMETER INSTITUTE

Mercredi fév 04, 2015

RECENT PUBLIC LECTURE

Quantum Mechanics and Spacetime in the 21st Century

Speaker: Nima Arkani-Hamed