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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. 

 

Non-perturbative problems in gauge theories: N=2 quiver QCD

Wednesday Mar 06, 2013
Speaker(s): 
Vasily Pestun
(Flash Presentation, MP4 Low Res, MP3, PDF)

Non-perturbative effects are responsible for the
essential dynamical features of the four-dimensional gauge theories such as
QCD.  The N=2 supersymmetric four-dimensional theories are an interesting
class of models in which non-perturbative computations can be carried out with
arbitrary precision using localization of the path integrals. I will explain
the new exact non-perturbative results and the relation to classical and
quantum integrable systems for a large class of N=2 supersymmetric QCD.

Collection/Series: 
Colloquium
Scientific Areas: 
Quantum Fields and Strings

 

Thermodynamical Property of Entanglement Entropy for Excited States and Holographic Local Quench

Tuesday Mar 05, 2013
Speaker(s): 
Masahiro Nozaki
(Flash Presentation, MP4 Low Res, MP3, PDF)

In this talk, we will describe our recent
work.  Recently, we focus on the thermodynamical property and time
dependence of entanglement entropy. Using holography, we found that the
entanglement entropy for a very small subsystem obeys a property which is
analogous to the first law of thermodynamics when we excite the system. In
relativistic setups, its effective temperature is proportional to the inverse
of the subsystem size. This provides a universal relationship between the

Collection/Series: 
String Seminars
Scientific Areas: 
Quantum Fields and Strings

 

The correlator of two vector and one axial current in QCD

Tuesday Mar 05, 2013
Speaker(s): 
Kirill Melnikov
(Flash Presentation, MP4 Low Res, MP3, PDF)

It is known that the correlator
of one axial and two vector currents, that receives leading contributions
through one-loop fermion triangle diagrams, is not modified by QCD radiative
corrections at two loops. It was suggested that this non-renormalization of the
VVA correlator persists in higher orders in perturbative QCD as well. To check
this assertion, I compute the three-loop QCD corrections to the
VAA-correlator using the technique of asymptotic expansions. I find that

Collection/Series: 
Particle Physics
Scientific Areas: 
Particle Physics

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