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.
In an anisotropic limit of the weakly-coupled, 2+1-dimensional non-Abelian
gauge theories are equivalent to a collection of integrable
1+1-dimensional quantum field theories. This fact makes it possible to
understand confinement near this limit. Using exact form factors, it is
possible to study the theory away from the extreme anisotropic limit. The
string tension between fundamental color sources is found. Adjoint sources
are not confined. Some ideas concerning the isotropic case and the
generalization to 3+1 dimensions will be discussed.
We give a communication problem between two players, Alice and Bob, that can be solved by Alice sending a quantum message to Bob, for which any classical interactive protocol requires exponentially more communication.
Graduate Course on Standard Model & Quantum Field Theory
Theories of physics beyond the Standard Model predict the existence of relativistic strings, either as composite objects, or as fundamental constituents of matter. If they were created in the Big Bang, they would very likely still be present in the universe today. This talk reviews the thirty year history of cosmic strings, and describes the latest work which finds intriguing hints in the Cosmic Microwave Background data that the universe is filled with string.
Graduate Course on Standard Model & Quantum Field Theory
Behavior of particles in qudit toric code, braid group, basic idea of fault tolerance with non-Abelian anyons
Toric code (definition, fault-tolerance, particle model of errors), definition of qudit toric code
To realize massive pions, I propose a variation of the holographic model of massless QCD using the D4/D8/D8bar-brane configuration proposed by Sakai and Sugimoto. The deformation breaks the chiral symmetry explicitly and I compute the mass of the pions and vector mesons. The observed value of the pion mass can be obtained. I also argue a chiral perturbation corresponding to the deformation.