# Events Archive

## 2014

### Particle Astrophysics Seminar: Maria Elena Monzani:SLAC "Dark Matter Searches in the Sky and Underground"

Fri, Feb 7, 2014, 2:30 pm to 3:00 pm
The existence of a source of gravitational effects beyond regular matter is well established, but its nature remains a deep mystery. In principle, Dark Matter particles could be detected either directly, via their interaction on target nuclei, or indirectly, by observing their annihilation in galaxy halos.

### High Energy Theory Seminar - Aitor Lewkowycz, Princeton University - "Exact results for the entanglement entropy and the energy radiated by a quark"

Fri, Feb 7, 2014, 1:30 pm to 2:30 pm
In this talk, I will present some results on the entanglement entropy due to the insertion of a Wilson loop in N=4 SYM and ABJM and will talk about the radiation emitted by a quark in these theories.

### Hamilton Colloquium Series - Philip W. Anderson, Princeton University: "The Discovery of the Anderson-Higgs Mechanism"

Thu, Feb 6, 2014, 4:30 pm to 6:00 pm
Landau introduced the idea of the ground state of a condensed matter system as a “vacuum” and of the elementary excitations as “quasiparticles” moving in this vacuum. He and Tisza noted that spontaneous orderings such as magnetism could be thought of as spontaneous symmetry-breaking of this vacuum, and based theories of phase transitions on this...

### Special Seminar - Symmetry Protected Topological Phases: Prediction, Construction, and Classification - Xie Chen

Thu, Feb 6, 2014, 2:00 pm to 3:00 pm
Topological insulators, with their gapless conducting edges around a gapped insulating bulk, represent a new form of matter. While their topological nature is usually attributed to free electrons filling a topological band structure, it is highly desirable to understand whether similar topological phenomena exist more generally in interacting...

### Special Seminar - Quantum simulation using cold atoms and a “brighter” future - Chen-Lung Hung, Caltech

Tue, Feb 4, 2014, 1:30 pm to 2:30 pm
Advances of quantum control in atomic and optical physics have made it possible to study intriguing phenomena originally discussed in condensed matter, nuclear, and gravitational physics. In quantum gas experiments, new insights are derived from out-of-equilibrium dynamics of novel quantum many-body phases.

### High Energy Theory Seminar - Denis Klevers, University of Pennsylvania - "F-Theory Compactifications with Multiple U(1)-Factors"

Mon, Feb 3, 2014, 2:30 pm to 3:30 pm
The construction of Abelian gauge symmetries in global F-theory compactifications has been more elusive than the well studied non-Abelian case. In this talk, I present a systematic approach to engineer Abelian gauge factors in F-theory, which are related to the Mordell-Weil group of rational points on elliptic curves.

### Particle Astrophysics Seminar: Barbara Caccianiga (Milano) & Marco Pallavicini (Genova) - "SOX - Short Baseline Oscillations with Borexino"

Wed, Jan 29, 2014, 2:00 pm to 3:00 pm
Reactor neutrino experiments and short baseline experiments at LANL and FNAL left the door open for the possibility of ~1 eV mass sterile neutrinos, mixing with the standard neutrino sector.

### High Energy Experimental Physics Seminar-Status and Prospects for Higgs Coupling Measurements -Marco Zanetti, MIT

Tue, Jan 28, 2014, 2:30 pm to 3:30 pm
A summary of results from CMS on the recently discovered Higgs boson is presented. Of particular importance are the Higgs couplings. Results to date are consistent with standard model expectations, but are limited in precision owing to a lack of statistics.

### Atomic Physics Seminar, Chenglin "Charles" Cao, "Searching for Perfect Fluids: Universal Quantum Viscosity in a Unitary Fermi Gas"

Fri, Jan 24, 2014, 12:00 pm to 1:30 pm
We measure the shear viscosity in a two-component Fermi gas of atoms, tuned to a broad s-wave Feshbach resonance. At resonance, the atoms strongly interact and exhibit universal behavior, where the equilibrium thermodynamic properties and the transport coefficients are universal functions of the density $n$ and temperature $T$.

### High Energy Theory Seminar - Josephine Suh, MIT - "Entanglement growth during thermalization via gauge/gravity duality"

Mon, Jan 20, 2014, 2:30 pm to 3:30 pm
I will present results on scaling regimes in entanglement growth during thermalization in holographic field theories. These scaling regimes are derived from the time evolution of entanglement entropy of spatial regions in a class of idealized thermalizing states in which a homogenous, isotropic density of energy is instantaneously injected into...

### Atomic Physics Seminar, Mark Limes, "$^{129}$Xe Relaxation and Rabi Oscillations"

Fri, Jan 17, 2014, 12:00 pm to 1:30 pm
Several studies in experimental and theoretical magnetic resonance are presented. The longitudinal relaxation of solid $^{129}$Xe is shown to have an unexpected structural dependence from experiments that provide previously unattainable reproducibility; first-principles theories that attempt to describe the observed data are analyzed.