Past Events

Thursday, December 7, 2017 - 11:30am
Physics 298
Speaker: Thomas Barthel (Duke University)
Quantum dimer models appear in different contexts when describing dynamics in constrained low-energy manifolds, such as for frustrated Ising models in weak transverse fields or Heisenberg magnets with quantum disordered ground states. In this talk, I address a particularly interesting case, where a... Read More »
Tuesday, December 5, 2017 - 3:30pm
Physics 298
Speaker: Alessandro Baroni (University of South Carolina)
Nuclear chiral effective field theory (xEFT) is the theoretical framework that permits the derivation of nuclear potentials and electroweak currents from the symmetries of QCD|the exact Lorentz, parity and time-reversal symmetries, and the approximate chiral symmetry. In this talk, the derivation... Read More »
Wednesday, November 29, 2017 - 3:30pm
Physics 128
Speaker: Gordon Cates (University of Virginia)
"Neutrons, Nephrology and Polarized Nuclear Imaging: MRI with a Millionfold Increase in Sensitivity" - The technique of spin-exchange optical pumping has found extensive use in both fundamental research and a variety of applications. For example, high-density polarized He-3 targets have played an... Read More »
Thursday, November 16, 2017 - 11:30am
Physics 298
Speaker: Aashish Clerk (University of Chicago)
Interest continues to grow in photonic analogues of topological electronic phases. In most cases, these systems are non-interacting, and have the same band structure and edge state structure as their fermionic counterparts. In this talk, I'll discuss recent theory work in my group showing how... Read More »
Tuesday, November 14, 2017 - 3:30pm
Raleigh, NC
Speaker: Yacine Mehtar Tani (Brookhaven National Lab)
The phenomenon of jet quenching in ultra-relativistic heavy ion collisions reveals to effect of substantial finial state interactions which cause QCD jets to lose energy to the quark-gluon plasma (QGP), mainly by induced gluon radiation. In standard analytic approaches to energy loss, jets are... Read More »
Wednesday, November 8, 2017 - 3:30pm
Physics 128
Speaker: Stephen Teitsworth (Duke Physics)
"Noise-driven dynamics in far-from-equilibrium systems" - The dynamical behavior of many far-from-equilibrium systems is crucially impacted by the interplay of noise and deterministic degrees of freedom. Examples of noise-enabled dynamics occur throughout the natural sciences including biophysical... Read More »
Tuesday, November 7, 2017 - 3:30pm
Raleigh, NC
Speaker: Dr. Matt Sievert (Theoretical Division of Los Alamos National Laboratory)
Because parton distribution functions (PDFs) are measured at finite center-of-mass energies, they must always be extrapolated to high-energy asymptotics where x goes to zero. This extrapolation is especially important for the determination of sum rules, such as the contribution to the proton spin... Read More »
Thursday, November 2, 2017 - 10:00am
Physics 298
Speaker: Ashley Jones, NASA Goddard Space Flight Center
Electron microbursts are rapid bursts of precipitation in radiation belts of the Earth that occur on the scale of ~tens of ms. Studies suggest microbursts may be able to empty the radiation belts on the time scale of a day and are associated with chorus waves. We will go over the basics of... Read More »
Thursday, October 26, 2017 - 11:30am
Physics 298
Speaker: Dmitri Khveshchenko (UNC Chapel Hill)
We discuss higher dimensional generalizations of the 0+1-dimensional Sachdev-Ye-Kitaev (SYK) model. Unlike the previous constructions where multiple SYK copies would be coupled via some spatially short-range one- and/or q-particle random hopping processes, this study focuses on the algebraically... Read More »
Wednesday, October 25, 2017 - 3:30pm
Physics 128
Speaker: Ken Brown (Georgia Tech)
"Protecting Quantum Information" - The interaction of a quantum system with its environment leads todecoherence and is the most important challenge facing the construction of a quantum computer. My research group studies two methods for reducing decoherence: quantum control and quantum... Read More »