Physics and Astronomy Colloquium

All future


Thursday, November 23rd 2017
3:35 pm:
Speaker: There will be no colloquium this week due to Thanksgiving

Thursday, November 30th 2017
3:35 pm:
Speaker: Philip Kim, Harvard University
Subject: Unusual quasiparticle correlation in graphene
Fall 2017 Van Vleck Lecturer

Interactions between particles in quantum many-body systems can lead to a collective behavior. In a condensed matter system consisting of weakly interacting particles, a propagating particle interacting with its surroundings can be viewed as a ‘dressed’ quasiparticle with renormalized mass and other dynamic properties. The lack of screening enables strong Coulomb interactions between charged particles, leading to new collective dynamics. In this talk, I will discuss three examples concerning strongly interacting quasiparticles in graphene. In the first example, it will be shown that the thermally populated electrons and holes to realize Dirac fluid, where a huge violation of Wiedemann-Franz law is observed. The second example is realizing magnetoexcitons to correlated the quasiparticles in quantized Landau levels to form magnetoexcitons, which can condense into Bose-Einstein condensation. Finally, we will also discuss another way of correlated quasi-particles in graphene using superconducting proximity effect. Here, we employ the crossed Andreev reflection across thin type II superconducting electrodes to correlated spatially separated quasiparticles. Under strong magnetic fields, the quantum Hall edge states can carry these quasiparticles.


Thursday, December 7th 2017
3:35 pm:
Speaker: Mark Bowick, KITP Santa Barbara
Subject: Fragile Objects: The Hard Science of Soft Matter

The natural and synthetic world has an extremely rich variety of states of matter. Many of these are fragile structures that are both flexible and complex and they range from atomic in scale to the very large. I will present four vignettes from the world of fragile objects (soft matter) that illustrate their counter-intuitive behavior and the intellectual challenge they present. I will demonstrate how the concept “state of matter” is often not as simple as one might think and show how fluctuations can lead to rather surprising behavior.

Faculty Host: Boris Shklovskii

Thursday, January 25th 2018
Speaker: TBD
Subject: TBD

Thursday, February 1st 2018
Speaker: TBD
Subject: TBD

Thursday, February 8th 2018
Speaker: Cristian Batista (Tennessee)
Subject: TBD
Faculty Host: Natalia Perkins

Thursday, February 15th 2018
08:00 am:
Speaker: TBD
Subject: TBD

Thursday, February 22nd 2018
Speaker: Erez Berg (University of Chicago)
Subject: TBD
Faculty Host: Paul Crowell

Thursday, March 1st 2018
Speaker: Joint Colloquium with Earth Sciences (Nier Lecture)
Subject: Exoplanets

Thursday, March 8th 2018
Speaker: TBD
Subject: TBD

Thursday, March 15th 2018
Subject: There will be no colloquium this week due to Spring Break

Thursday, March 22nd 2018
Speaker: Pablo Jarillo-Herrero (MIT)
Subject: TBD
Faculty Host: Paul Crowell

Thursday, March 29th 2018
Speaker: TBD
Subject: TBD

Thursday, April 5th 2018
Speaker: TBD
Subject: TBD

Thursday, April 12th 2018
Speaker: TBD
Subject: TBD

Thursday, April 19th 2018
Speaker: Ali Yazdani (Princeton University)
Subject: TBD
Faculty Host: Paul Crowell

Thursday, April 26th 2018
Speaker: TBD
Subject: TBD

Thursday, May 3rd 2018
Speaker: TBD
Subject: TBD

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