Now showing items 17-36 of 91

    • Fate of the Kinetic Ising Model 

      Redner, Sidney (Georgia Institute of Technology, 2013-02-25)
      What could possibly be new in the Ising model, arguably the most-studied model of statistical physics? Plenty! Consider the Ising model initially at infinite temperature that is suddenly cooled to zero temperature and ...
    • Fractionalized Quasi-Particles in Frustrated Quantum Magnets 

      Broholm, Collin (Georgia Institute of Technology, 2013-02-18)
      I present inelastic neutron scattering data from one- two- and three-dimensional insulating magnetic materials at low temperatures that do not display a coherent resonant mode of excitation. Instead, momentum resolved ...
    • From Microstructure to Morphology: Topological Defects and Shape Evolution in Soft Matter 

      Selinger, Robin (Georgia Institute of Technology, 2017-11-06)
      Soft materials with orientational order can undergo dramatic shape transformations driven by change of temperature or other stimuli. Nematic elastomers, a form of liquid crystal polymer, have been patterned with topological ...
    • From Social Intelligence of Bacteria to Cyber-war on Cancer 

      Ben-Jacob, Eshel (Georgia Institute of Technology, 2012-11-26)
      Cancer continues to elude us. Metastasis, relapse and drug resistance are all still poorly understood and clinically insuperable. Evidently, the prevailing paradigms need to be re-examined and out-of-the-box ideas ought ...
    • Gamma Ray Bursts: The High Energy Photon Emission, and Implications for Gravitational Waves, Cosmic Rays and Neutrinos 

      Meszaros, Peter (Georgia Institute of Technology, 2011-10-05)
      Gamma-ray bursts have been detected at photon energies up to tens of GeV, and there are reasons to believe that the sources emit at least up to TeV energies, via leptonic or/and hadronic mechanisms. I review some recent ...
    • HAWC: A New Gamma-Ray Observatory to Probe Nature's Highest-Energy Accelerators 

      Westerhoff, Stefan (Georgia Institute of Technology, 2015-09-21)
      In March 2015, Mexico and the U.S. inaugurated a new high-energy gamma-ray observatory near Puebla, Mexico: the HAWC (High-Altitude Water Cherenkov) Observatory. Located at 4,100 meters altitude, HAWC is a large field-of-view ...
    • Hierarchical Self-Assembly in Liquid Crystals a Rich Menu of Basic Science and Technology from the Origin of Life to Trillion Dollar Markets 

      Clark, Noel (Georgia Institute of Technology, 2017-01-29)
      The study of liquid crystals occupies a central place in materials science, serving as a context for encountering and using a variety of exotic structural themes of molecular organization, particularly of soft matter. A ...
    • High Energy Time Domain Astronomy with Swift and Beyond 

      Hartmann, Dieter H. (Georgia Institute of Technology, 2016-10-03)
      The Swift Gamma-Ray Burst (GRB) Explorer was launched in 2004 with two objectives: 1) To precisely localize GRBs and promptly relay their positions to other observatories; and, 2) To characterize the GRB afterglow phase ...
    • Hofstadter's Butterfly in the Strongly Interacting Regime 

      Dean, Cory (Georgia Institute of Technology, 2015-03-23)
      In 1976, Douglas Hofstadter predicted that in the presence of both a strong magnetic field, and a spatially varying periodic potential, Bloch electrons confined to a 2D quantum well exhibit a self-similar fractal energy ...
    • How Do Chipper, Kobe, Serena and Rory Do It? What Physics Has to Say About Achievements in Sports 

      Can, Cüneyt (Georgia Institute of Technology, 2013-01-28)
      A great part of physics deals with motion, and the essence of sports is the human body in motion. The components of the human body that produce motion, namely the skeletal muscles and bones, and the sports equipment itself ...
    • How Materials Can Learn to Function 

      Liu, Andrea J. (Georgia Institute of Technology, 2021-03-29)
      How does learning occur? In the context of neural networks, learning occurs via optimization, where a loss function is minimized to achieve the desired result. But physical networks such as mechanical spring networks or ...
    • How Worms Wiggle 

      Samuel, Aravi (Georgia Institute of Technology, 2012-11-19)
      Directed locomotion requires coordinated motor activity throughout an animal’s body. The nematode C. elegans, with only 302 neurons, offers an opportunity to understand how locomotion is organized by an entire motor system. ...
    • Hydrodynamics and Quantum Anomalies 

      Son, Dam Thanh (Georgia Institute of Technology, 2014-09-15)
      Hydrodynamics is the theory describing collective behaviors of fluids and gases. It has a very long history and is usually considered to belong to the realm of classical physics. In recent years, it has been found that, ...
    • In Pursuit of Dark Matter: Recent Results from the SuperCDMS Experiment 

      Cooley, Jodi (Georgia Institute of Technology, 2014-10-27)
      The existence of dark matter was first postulated by Jan Oort in1932 to account for the orbital velocities of stars in the Milky Way. Since that time, astrophysicists and astronomers have produced compelling evidence ...
    • Ion and Nanodrop Injection from Taylor Cones into Gases and Liquids 

      Fernandez de la Mora, Juan (Georgia Institute of Technology, 2012-01-30)
      When sufficiently charged, the interface between a conducting liquid and an insulator (vacuum, gas, liquid) becomes unstable and forms sharp conical tips (Taylor cones) which inject liquid into the insulator. This injection ...
    • Ion Hydration and Effective Charge 

      Pincus, Philip A. (Georgia Institute of Technology, 2018-03-26)
      Ions in water are typically understood to be hydrated, i.e. the appropriate water dipolar orientations point toward the charge (which is here taken to be of spherical symmetry). Depending on the specific charge, these ...
    • Life in the Universe 

      Loeb, Abraham (Avi) (Georgia Institute of Technology, 2018-03-12)
      Is life most likely to emerge at the present cosmic time around a star like the Sun? Loeb will review the habitability throughout cosmic history from the birth of the first stars 30 million years after the Big Bang to the ...
    • Local temperature Ansatz: A novel quantum entanglement based approach for solving strongly correlated systems 

      Vaezi, Abolhassan (Georgia Institute of Technology, 2018-02-05)
      The exact solution to interacting quantum problems is, in general, an exponentially hard task due to the exponential growth of the Hilbert space with the system size. As a result, despite extensive research during the past ...
    • Loop Quantum Gravity: A Bird’s Eye View 

      Ashtekar, Abhay (Georgia Institute of Technology, 2017-11-13)
      After a brief overview of quantum gravity as a whole, Dr. Ashtekar will explain the basics of Loop Quantum Gravity and its applications to some long standing questions: the nature of the very early universe and the ultimate ...
    • Machine Learning for Partial Differential Equations 

      Brenner, Michael P. (Georgia Institute of Technology, 2020-11-16)
      When Newton's laws are applied in every point in space we arrive at a set of nonlinear partial differential equations describing the world. We often marvel at the complexity of the solutions, but we know very well that ...