Past Events

Tuesday, March 11, 2014 - 3:30pm
Physics 298
Speaker: Jesse Thaler (MIT)
Perturbative QCD is a powerful tool for calculating the properties of jets at the LHC. However, there are many jet observables for which non-perturbative input from QCD is needed. In this talk, I present three case studies at the boundary between perturbative and non-perturbative QCD---ratio... Read More »
Thursday, February 27, 2014 - 11:45am
Physics 128
Speaker: Soumya Bera (Institut Neel, Grenoble France)
In nature real systems are coupled to a large number of macroscopic degrees of freedom which play an important role in determining their phase coherence. To understand the role of the environment it is customary to begin with a simple model of a qubit (two level system) coupled with an infinite... Read More »
Tuesday, February 25, 2014 - 3:30pm
Physics 298
Speaker: Jacob Bourjaily (Harvard)
In the past ten years, the study of scattering amplitudes in quantum field theory has led to a revolutionary reformulation of the subject. This revolution began with the discovery, in 2005, of a recursive expansion for scattering amplitudes (to leading order) in terms of planar, trivalent, two-... Read More »
Thursday, February 20, 2014 - 11:30am
Physics 128
Speaker: Leong-Chuan Kwek
To circumvent the limitations of conventional computers in tackling complex physical processes, Richard Feynman proposed nearly thirty years ago a means of using well-understood quantum systems called quantum simulators (or quantum emulators) to emulate similar, but otherwise poorly understood,... Read More »
Wednesday, February 19, 2014 - 3:30pm
Physics 128
Speaker: Robin Canup (SouthWest Research Institute)
*CANCELLED** "Giant Impact Models of Lunar Origin" - Nearly all recent work on lunar origin has focused on the giant impact theory, which proposes that the collision of a planet-sized body with the forming Earth produced a disk of debris that later accumulated into the Moon. The impact theory is... Read More »
Tuesday, February 18, 2014 - 3:30pm
Physics 298
Speaker: Xiangdong Ji (U. of Maryland)
I introduce light-cone physics as a large momentum effective field theory (LMEF). This notion allows formulating Euclidean lattice calculations of parton physics which is otherwise considered impossible.
Monday, February 17, 2014 - 3:30pm
Physics 128
Speaker: Nick Ouellette (Yale)
** Please note this event is for Monday not Wednesday. ** "Collective Dynamics of Laboratory Insect Swarms" Self-organized collective animal behavior--in swarms, flocks, schools, herds, or crowds--is ubiquitous throughout the animal kingdom. In part because it is so generic, it has engaged and... Read More »
Thursday, February 13, 2014 - 11:30am
Physics 128
Speaker: Cenke Xu (USCB)
This event has been postponed due to the winter weather. It will be rescheduled later this semester. Spin liquid states are ground states of quantum spin systems that do not spontaneously break any global symmetry. In the last decade tremendous progresses have been made in searching for spin liquid... Read More »
Tuesday, February 11, 2014 - 3:30pm
Physics 298
Speaker: Krzysztof Redlich (Wroclaw U.)
We discuss results on the Polyakov loop susceptibilities in SU(3) lattice gauge theory. The longitudinal and transverse fluctuations of the Polyakov loop, as well as, that of its absolute value will be introduced in the context of the confinement-deconfinement phase transition. We will indicate... Read More »
Friday, February 7, 2014 - 2:30pm
Physics 278
Speaker: Pi-Jung Chang (Kansas State University)
In March 2012, the Double Chooz reactor neutrino experiment published its most precise result so far: sin22¿13 = 0.109 ± 0.030(stat.) ± 0.025(syst.). The statistical significance is 99.9% away from the no-oscillation hypothesis. The systematic uncertainties from background and detection efficiency... Read More »