Past Events

Thursday, January 17, 2019 - 11:30am
Physics 298
Speaker: Jason Petta (Princeton University)
The bulk conduction band of Si has six equivalent valleys. Strain in Si/SiGe heterostructures partially lifts the six-fold valley degeneracy by raising the energy of the four in-plane valleys. It is known that large electric fields can lift the degeneracy of the remaining two low-lying valleys.... Read More »
Wednesday, January 16, 2019 - 3:30pm
Physics 130
Speaker: Nicolas Brunel (Duke Neurobiology and Duke Physics)
"Storing and retrieving memories in models of neuronal networks" Memories are thought to be stored in brain networks thanks to modifications of synaptic connectivity between neurons. Mathematical models of synaptic plasticity (sometimes called `synaptic plasticity rules' or `learning rules')... Read More »
Wednesday, January 16, 2019 - 12:00pm
Fitzpatrick Center Schiciano Auditorium Side A, room 1464
Speaker: Eva Zurek, The State University of New York at Buffalo
The pressure variable opens the door towards the synthesis of materials with unique properties, e.g. superconductivity, hydrogen storage media, high-energy density and superhard materials. Under pressure elements that would not normally combine may form stable compounds or they may mix in novel... Read More »
Tuesday, January 15, 2019 - 3:30pm
Physics 298
Speaker: Derek Teaney (Stony Brook University)
First, I review hydrodynamic fluctuations and why theyare important to the search for the QCD critical point. I discusshow stochastic hydrodynamics leads (though loops) to longtime tails which appear to the 1.5 order in the gradient expansion.Subsequently, I use this knowledge to discuss... Read More »
Wednesday, January 9, 2019 - 3:30pm
Physics 130
Speaker: Norbert Scherer (University of Chicago)
"Symmetry, Forces and Torques in the Dynamics and Excitations of Optical Matter" Optical matter, collections of material particles that are bound together with light (electromagnetic fields), is readily formed in focused beams of light. Scattering between the constituent particle elements lead to... Read More »
Monday, December 17, 2018 - 3:00pm
Physics 278
Speaker: Mike Kirby, Fermilab
MicroBooNE is a neutrino experiment utilizing a Liquid Argon TimeProjection Chamber (LArTPC) with an active volume of 87 ton located ata baseline of 470 m in the Fermilab Booster Neutrino Beam(BNB). Beginning operations in October 2015, the MicroBooNE detectorhas recorded events from a BNB exposure... Read More »
Friday, December 14, 2018 - 6:00pm
Duke Teaching Observatory
Observe the sky through modern 10" telescopes, guidedby Duke physicists. Everyone welcome. Weather dependent, check web page for weather updates.
Thursday, December 6, 2018 - 11:30am
Physics 298
Speaker: Luiz Henrique Bugatti Guessi (Universidade de Sao Paulo, Duke)
Bound states in the continuum (BICs) are states with localized wave-functions even though lying in the continuum. Here, we explore theoretically the emergence of BICs in a system comprising two identical quantum dots side-coupled to a quantum wire. The dots are symmetrically coupled to the site at... Read More »
Tuesday, December 4, 2018 - 3:30pm
Physics 298
Speaker: Natalia Tenorio Maia (University of Pittsburgh)
n order to detect and study the data encoded in a gravitational wave signal, it is necessary not only an extreme accurate experimental apparatus, but also an accurate theoretical description of the dynamics of the source and the radiation emitted by it. The inspiral stage of a binary system of... Read More »
Tuesday, December 4, 2018 - 1:30pm
Physics 298
Speaker: Dave Morrison
The detailed study of degenerations of K3 surfaces as complex manifoldsgoes back more than forty years and is fairly complete. Much less isknown about the analogous problem in differential geometry of findingGromov--Hausdorff limits for sequences of Ricci-flat metrics on the K3manifold. I will... Read More »