Past Department Colloquia

Thu, 2016-04-14 16:00 - 17:00
Kip Thorne, Cal. Tech.


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.

Thu, 2016-04-07 16:00 - 17:00
Stephan Meyer, University of Chicago


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.

Thu, 2016-03-31 16:00 - 17:00
Piers Coleman, Rutgers Dept. of Physics
Thu, 2016-03-24 16:00 - 17:00
Mark Johnson, D-wave
Thu, 2016-03-17 16:00 - 17:00
David C. Bell, Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
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.
Thu, 2016-03-10 16:00 - 17:00
Michelle Wang, Cornell
Thu, 2016-03-03 16:00 - 17:00
Chris Waltham and Scott Oser, UBC Physics and Astronomy
Thu, 2016-02-25 16:00 - 17:00
Graduate Students

Thu, 2016-02-11 16:00 - 17:00
Abigail Vieregg, Chicago KICP
Thu, 2016-02-04 16:00 - 17:00
Edward Graves, Stanford Departments of Radiation Oncology and Radiology
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