Department Colloquia

In Search of Dark Matter

Speaker: 
David Morrissey (TRIUMF)
Event Date and Time: 
Thu, 2016-09-15 16:00 - 17:00
Location: 
Hennings 201
Local Contact: 
Douglas Scott
Intended Audience: 
Undergraduate

Measurements of the Universe over very large distances suggest that it contains much more matter than can be accounted by conventional forms.  Little is known about what this "dark matter" might be.  In this talk I will discuss the evidence for the dark matter hypothesis, describe some of the most promising dark matter candidates, and explain how current laboratory experiments and astronomical observations are trying to identify it.  I will also describe how tests of dark matter could provide a window on new elementary particles and forces.

The Sudbury Neutrino Observatory: Observation of Flavour Change for Solar Neutrinos

Speaker: 
A. B. McDonald, Queen’s University, Kingston, Ontario for the SNO Collaboration
Event Date and Time: 
Tue, 2016-05-31 15:00 - 17:00
Location: 
Henn 201
Local Contact: 
Scott Oser
Intended Audience: 
Graduate

 

Imaging and Analysis of Quantum Materials using Low Voltage Electron Microscopy

Speaker: 
David C. Bell, Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
Event Date and Time: 
Thu, 2016-03-17 16:00 - 17:00
Location: 
Hennings 201
Local Contact: 
Mark Halpern / Leanne Ebbs
Intended Audience: 
Public
Quantum materials are atomically layered materials such as graphene or hexagonal boron nitride (h-BN). Their properties differ strongly from those of their 3D bulk state. Depending on the composition, quantum materials may act as conductors, insulators, semiconductors or even as superconductors. Especially combinations of different quantum materials are of high interest to explore new phenomena and as the foundation for future electronic devices at the nanometer scale.

Waves, vortices and superfluids

Speaker: 
Frederic Chevy, ENS Paris and Ecole Polytechnique
Event Date and Time: 
Thu, 2016-04-21 16:00 - 17:00
Location: 
Hennings 201


In his famous lectures, R. P. Feynman highlights the deep unity of physics and the analogies existing between sometimes vastly different physical systems. In the same spirit I will demonstrate how the tools and concepts inherited from classical hydrodynamics can be used to explain the quantum world. As an example, I will show that the same phenomena govern the physics of water-walking insects and that of laser-cooled superfluid vapours.

Probing the Warped Side of our Universe with Gravitational Waves and Computer Simulations

Speaker: 
Kip Thorne, Cal. Tech.
Event Date and Time: 
Thu, 2016-04-14 16:00 - 17:00
Location: 
Hennings 201
Local Contact: 
Mark Halpern


A half century ago, John Wheeler challenged his students and colleagues to explore Geometrodynamics: the nonlinear dynamics of curved spacetime. They tried, and failed. Success eluded the relativity community until two new tools became available: computer simulations, and gravitational-wave observations. Thorne will describe what these have taught us, beginning with Choptuik’s critical collapse simulations in the 1990s, and concluding with LIGO’s recent observations of colliding black holes; and he will offer a vision for the future of Geometrodynamics.

Search for Space-Time Correlations from the Planck Scale with the Fermilab Holometer.

Speaker: 
Stephan Meyer, University of Chicago
Event Date and Time: 
Thu, 2016-04-07 16:00 - 17:00
Location: 
Hennings 201


I will describe the first results from a search for entangled exotic shear fluctuations which are postulated to exist in order to preserve holographic information bounds in a macroscopic system.  The instrument, constructed for this purpose, consists of  a pair of collocated, 39 m long, high-power Michelson interferometers operating at fundamental noise limited differential arm length sensitivity. The cross-correlated signal from the interferometers in a band from 1 to 10 MHz is used to exclude the shear-noise information bound model to 4.6 sigma significance.

TBA--cm theory

Speaker: 
Piers Coleman, Rutgers Dept. of Physics
Event Date and Time: 
Thu, 2016-03-31 16:00 - 17:00
Location: 
Hennings 201

Next Generation Quantum Computers

Speaker: 
Mark Johnson, D-wave
Event Date and Time: 
Thu, 2016-03-24 16:00 - 17:00
Location: 
Hennings 201

Biological Motors

Speaker: 
Michelle Wang, Cornell
Event Date and Time: 
Thu, 2016-03-10 16:00 - 17:00
Location: 
Hennings 201

Resolving the Solar Neutrino Problem at SNO

Speaker: 
Chris Waltham and Scott Oser, UBC Physics and Astronomy
Event Date and Time: 
Thu, 2016-03-03 16:00 - 17:00
Location: 
Hennings 201
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