English | Français     A A     Connect With Us

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. 

 

To Split or Not to Split

Tuesday Apr 02, 2013
Speaker(s): 
Asimina Arvanitaki
(Flash Presentation, MP4 Low Res, MP3, PDF)

Physics
is at a crossroad that leads either to Naturalness or the Multiverse. While the
confirmation of gauge coupling unification in the early 90s gave a tremendous
boost to naturalness and to low energy SUSY, the lack of evidence
for new physics beyond the standard model at the LHC points to a paucity of new
particles near the weak scale. This suggests that the weak scale is tuned and
that supersymmetry, if present at all, is realized at higher energies. This

Collection/Series: 
Particle Physics
Scientific Areas: 
Particle Physics

 

Shake, Rattle and Explode: Short GRBs and the Electromagnetic Counterparts of Gravitational Wave Sources

Tuesday Apr 02, 2013
Speaker(s): 
Edo Berger
(Flash Presentation, MP4 Low Res, MP3, PDF)

The bimodality of gamma-ray burst (GRB) durations points
to distinct progenitor classes for the long- and short-duration GRBs. While the
progenitors of long-duration GRBs are now known to be massive stars, the
progenitors of short-duration GRBs remain unidentified. In this talk I will
discuss the discovery of short GRB afterglow and their host galaxies, detailed
studies of their environments from parsec to galactic scales, and studies of
their energetics and beaming. Taken together, these observations point to the

Collection/Series: 
Strong Gravity
Scientific Areas: 
Cosmology,
Strong Gravity

 

S=1 spin liquid with fermionic excitations

Thursday Mar 28, 2013
Speaker(s): 
Maksym Serbyn
(Flash Presentation, MP4 Low Res, MP3, PDF)

In the first part of my talk I describe a search for
possible quantum spin liquid ground states for spin S=1 Heisenberg models on
the triangular lattice which was motivated by recent experiments on
Ba3NiSb2O9.  We use representation of
spin-1 via three flavors of fermionic spinon operators. The ground state where
one gapless flavor of spinons with a Fermi surface coexists with d+id
topological pairing of the two other flavors can explain available experimental
data. Despite the existence of a Fermi surface, this spin liquid state has

Collection/Series: 
Condensed Matter
Scientific Areas: 
Condensed Matter

Pages