Colloquium

This series covers all areas of research at Perimeter Institute, as well as those outside of PI's scope.

Seminar Series Events/Videos

May 15 2019 - 2:00pm
Room #: 294
May 28 2019 - 11:00am
Room #: 294
Speaker(s):
 

 

Wednesday Apr 24, 2019
Speaker(s): 

The study of strongly  interacting quantum matter has been at the forefront of condensed matter research in the last several decades. An independent development is the discovery of topological band insulators.  In this talk I will  describe phenomena that occur at the confluence of topology and strong interactions.

Collection/Series: 
Scientific Areas: 
 

 

Wednesday Apr 17, 2019
Speaker(s): 

Over the years, many rich ideas have been exchanged between particle theory and condensed matter theory, such as particle/hole theory, superconductivity and dynamical symmetry breaking, universality and critical phenomena.

Collection/Series: 
 

 

Wednesday Apr 10, 2019
Speaker(s): 

In some of the planet's most extreme environments scientists are constructing enormous detectors to study the very rare interactions produced by neutrinos. In particular, at South Pole Station Antarctica more than a cubic kilometer of the deep glacial ice has been instrumented to construct the world's largest neutrino detector to date: the IceCube Neutrino Observatory.

Collection/Series: 
 

 

Tuesday Apr 09, 2019
Speaker(s): 

Despite intensive theoretical research for several decades, the theory of quantum gravity remains elusive. I will review the obstacles that prevent from reconciling the principles of general relativity with those of quantum mechanics. It is plausible that an eventual ultraviolet completion of general relativity will require sacrificing some of these principles. I will then focus on the class of theories where the abandoned property is local Lorentz invariance, replaced by an approximate anisotropic scaling symmetry in deep ultraviolet.

Collection/Series: 
 

 

Thursday Apr 04, 2019
Speaker(s): 

Hidden sector particles, with masses and couplings below those of the weak interactions, can resolve many of the outstanding questions of the Standard Model, including the identity of dark matter, the origin of the baryon asymmetry, and the physics of neutrino masses. Existing searches at colliders such as the Large Hadron Collider are, however, often insensitive to signals of hidden sectors. Using the well-motivated example of low-scale leptogenesis and neutrino masses, I will demonstrate connections between the cosmology of hidden sectors and their signatures in experiments.

Collection/Series: 
 

 

Wednesday Apr 03, 2019
Speaker(s): 
Collection/Series: 
 

 

Monday Apr 01, 2019
Speaker(s): 

Current progress in quantum field theory is largely driven by the conformal bootstrap program, which aims to classify the space and properties of conformal field theories using symmetries and other fundamental constraints. In the context of the AdS/CFT Correspondence, this increasingly sophisticated endeavor doubles as a probe of foundations of quantum gravity.

Collection/Series: 
 

 

Wednesday Mar 27, 2019
Speaker(s): 

3d quantum gravity is a beautiful toy-model for 4d quantum gravity: it is much simpler, it does not have local degrees of freedom, yet retains enough complexity and subtlety to provide a non-trivial example of dynamical quantum geometry and open new directions of research in physics and mathematics. I will present the Ponzano-Regge model, introduced in 1968, built from tetrahedra “quantized" as 6j-symbols from the theory of recoupling of spins.

Collection/Series: 
 

 

Wednesday Mar 20, 2019
Speaker(s): 

Strong gravitational lenses with measured time delays between the multiple images can be used to determine the Hubble-Lemaitre constant (H0) that sets the expansion rate of the Universe. An independent determination of H0 is important to ascertain the possible need of new physics beyond the standard cosmological model, given the tension in current H0 measurements. A program initiated to measure H0 to <3.5% in precision from strongly lensed quasars is in progress, and I will present the latest results and their implications. Search is underway to find new lenses in imaging surveys.

Collection/Series: 
 

 

Friday Mar 15, 2019
Speaker(s): 

The discovery of a Higgs like boson at LHC in 2012 was a development of fundamental importance in particle physics.

Collection/Series: 
Scientific Areas: 

Pages