# Events Archive

## Donald R. Hamilton Colloquium

### Physics Colloquium: Cheng Chin

Thu, Sep 29, 2011, 4:30 pm to 6:00 pm
“Observation of Scale Invariance and Quantum Criticality of Ultracold Atoms in Optical Lattices

### Physics Colloquium: Jason Petta

Thu, Sep 22, 2011, 4:30 pm to 6:00 pm
“Strong-Arming Electron Spin Dynamics

### Elena Aprile

Thu, Apr 21, 2011, 4:30 pm to 6:00 pm

### David Weitz

Thu, Apr 14, 2011, 4:30 pm to 6:00 pm

### Saul Perlmutter

Thu, Mar 31, 2011, 4:30 pm to 6:00 pm

### Christophe Salomon

Thu, Mar 10, 2011, 4:30 pm to 6:00 pm

### Chris Herzog

Thu, Mar 3, 2011, 4:30 pm to 6:00 pm

### Jonathan Feng "WIMPS and beyond"

Thu, Feb 24, 2011, 4:30 pm to 6:00 pm
Abstract: A quarter of the Universe is composed of dark matter, but the particle identity of dark matter remains a deep mystery. I will review recent progress in resolving this puzzle, focusing on several leading classes of dark matter candidates, including WIMPs and related possibilities.

### David Stork-Ricoh Innovations "Computer vision and optics in the study of fine art"

Thu, Feb 10, 2011, 4:30 pm to 6:00 pm
New rigorous computer vision algorithms have shed light on a number of problems and controversies in the history and interpretation of fine art.

### Gavin Salam, CERN, Princeton & LPTHE Paris

Thu, Dec 2, 2010, 4:30 pm to 6:00 pm

Thu, Nov 18, 2010, 4:30 pm to 6:00 pm

Thu, Nov 11, 2010, 4:30 pm to 6:00 pm

### Aldo Antognini, Max Planck Institut fur Quantenoptik and ETH,"The proton radius puzzle"

Thu, Oct 28, 2010, 4:30 pm to 6:00 pm
At the Paul Scherrer Institute, Switzerland, we have recently measured the 2S-2P transition frequency (Lamb shift) in muonic hydrogen with 15 ppm precision by means of laser spectroscopy. From this measurement we have determined the rms charge radius of the proton.

### Marc Mezard, CNRS - Université Paris Sud-"Glassy phase transitions in hard computer science problems"

Thu, Oct 21, 2010, 4:30 pm to 6:00 pm
Given a large set of discrete variables, and some constraints between them, is there a way to choose the variables so that all constraints are satisfied?This "satisfiability" problem is one of the most fundamental complex optimization problems. It also has very concrete applications, for instance in computer chip testing or in error correcting...

### Marcelo Magnasco, Rockefeller University "Learning to be critical"

Thu, Oct 14, 2010, 4:30 pm to 6:00 pm
We hypothesize that many large-scale biological networks organize themselves to operate in a dynamical regime where extensively many (in the thermodynamic sense) degrees of freedom poise themselves'' at the edge of a dynamical instability; we further hypothesize such dynamical criticality underlies the ability of the system to propagate...

### Vladimir Falko, Lancaster University, Lancaster UK "Electronic properties of bilayer graphene, from 'high' to 'low' energies"

Thu, Oct 7, 2010, 4:30 pm to 6:00 pm
I shall describe rich physics peculiar for elctrons in bilayer graphene at various scales of excitation energies. Using tight binding model for electrons in bilayers, I'll show that electrons in bilayer graphene (BLG) are Berry phase 2pi quasiparticles, with peculiar Landau level spectrum manifested in charactersitic sequencing of quantum Hall...

### Boris Altshuler, Columbia University "Anderson localization: looking forward"

Thu, Sep 30, 2010, 4:30 pm to 6:00 pm
Localization of the eigenfunctions of quantum particles in a random potential was discovered by P.W. Anderson more than 50 years ago. In spite of its respectable maturity and rather intensive theoretical and experimental studies this field is by far not exhausted.

### Scott Tremaine, IAS "2020 Vision: the Decade Survey in Astronomy and Astrophysics"

Thu, Sep 23, 2010, 4:30 pm to 6:00 pm
Last month the National Research Council completed a massive two-year project to prioritize major projects and other activities in astronomy and astrophysics for the next decade. I will review the process and results, and how they were influenced by the scientific and political landscape and by the successes and failures of past decade surveys.