Shuntaro Sumita, Kyoto University
Topological Gapless Points in Superconductors: from the viewpoint of symmetry
Topology in quantum physics has attracted much attention in recent condensed matter physics. One famous example is the topological insulator, which has a finite gap in its energy spectrum.

Dr. Vincent Smith, Honorary Research Fellow; University of Bristol (UK)
CERN: An In-Depth Look

CERN (near Geneva, Switzerland) was founded in 1954 by 12 European countries and now has 22 “member states.” I have been fortunate to have worked on experiments there since 1976, when the new Super Proton Synchrotron was commissioned. Since the late 1990’s, I have been a member of the Compact Muon Solenoid collaboration, one of the big experiments on CERN's Large Hadron Collider. I worked initially on the development, installation and commissioning of the Electromagnetic Calorimeter, a system of over 75,000 crystals of Lead Tungstate (PbWO_4) to measure the energy and direction of high energy gamma rays, electrons and positrons from collisions in the center of the detector.

As the University is currently on Spring Break, there is no colloquium scheduled for Friday, March 22.

There is no Physics colloquium currently scheduled for this date.

Aaron Viets, PhD Candidate, University of Wisconsin-Milwaukee

Optimizing Advanced LIGO's Scientific Output with Fast, Accurate, Clean Calibration

Fast, accurate calibration of Advanced LIGO data is an essential part of gravitational-wave astronomy, necessary for prompt electromagnetic follow-up of gravitational-wave events and reliable estimation of source parameters.

Victor Muñoz, University of California-Merced

Lessons About Biomolecular Rate Theory from Ultrafast Kinetics and Single-Molecule Spectroscopy of Fast-Folding Proteins

Natural proteins fold and unfold with rates that define their biological properties and vary vastly from protein to protein. Understanding how these rates are determined is essential to decipher the mechanisms of protein folding, but is also a convenient system to explore the fundamental aspects of biomolecular rate theory. Protein (un)folding rates are described as diffusion on a free energy surface obtained by projecting the protein-solvent hyper-dimensional phase space (or folding energy landscape) onto one or few order parameters that capture the reaction’s progress.