Now showing items 59-78 of 91

    • Scalable Technologies for Quantum Computing with Trapped Atomic Ions 

      Brown, Kenton R. (Georgia Institute of Technology, 2012-09-17)
      From the earliest days of the field of quantum information, trapped atomic ions have had great potential as qubits. Trapped-ion experiments have separately demonstrated the individual ingredients believed necessary for ...
    • School of Physics Annual Chair's Address 

      Laguna, Pablo (Georgia Institute of Technology, 2013-08-26)
      Pablo Laguna, newly appointed chair of the School of Physics, spoke about his view of the field, the school and his plans for faculty, students and outreach.
    • The Search for Modulated Superconductivity 

      Mueller, Erich (Georgia Institute of Technology, 2014-11-03)
      In the mid 60's, theoretical physicists came to the conclusion that a strong magnetic field could lead to a superconducting state where magnetism and superconductivity are interleaved on the nano-scale: tidal wave like ...
    • Search Levitation by Casimir forces in and out of equilibrium 

      Kardar, Mehran (Georgia Institute of Technology, 2017-11-27)
      A generalization of Earnshaw's theorem constrains the possibility of levitation by Casimir forces in equilibrium. The scattering formalism, which forms the basis of this proof, can be used to study fluctuation-induced ...
    • Seeing the Light: J. C. Bose and Table-Top Experimental Science 

      Roy, Rajarshi (Georgia Institute of Technology, 2015-09-28)
      The eye and brain work together to form our impressions of reality. Our perspectives of what is happening around us can be influenced by perceptual reference frames and feedback loops. The complexity of visual processing ...
    • Self-propelled topological defects 

      Yeomans, Julia (Georgia Institute of Technology, 2020-10-26)
      Active materials such as bacteria, molecular motors and eukaryotic cells continuously transform chemical energy taken from their surroundings to mechanical work. Dense active matter shows mesoscale turbulence, the emergence ...
    • SETI: Any Closer to a Discovery? 

      Shostak, Seth (Georgia Institute of Technology, 2018-09-24)
      Are we alone in the universe? The scientific hunt for extraterrestrial intelligence is now well into its fifth decade, and we still haven’t discovered any cosmic company. Could all this mean that finding biology beyond ...
    • Single-Atom Optical Clocks 

      Wineland, David J. (Georgia Institute of Technology, 2013-10-21)
      With the availability of spectrally pure lasers and the ability to precisely measure optical frequencies, it appears the era of optical atomic clocks has begun. At the expense of signal-to-noise ratio, in one project at ...
    • Sloppy models, differential geometry, and why science works 

      Sethna, James P. (Georgia Institute of Technology, 2020-09-28)
      Models of systems biology, climate change, ecology, complex instruments, and macroeconomics have parameters that are hard or impossible to measure directly. If we fit these unknown parameters, fiddling with them until they ...
    • Spin Electronics: Magnetic Moments and Amorphous Semiconductors 

      Hellman, Frances (Georgia Institute of Technology, 2012-09-10)
      Spin electronics in its broadest definition is the study of systems where both the charge and the spin of the electron play a role. The term was originally intended as a new technological concept, where traditionally the ...
    • Spinor Bose-Einstein Condensates and Quantum Antiferromagnetism 

      Raman, Chandra (Georgia Institute of Technology, 2011-09-21)
      Bose-Einstein condensates (BECs) have revolutionized atomic physics, a revolution which, sixteen years after their discovery, shows little sign of stopping. The attention of the quantum gases community has increasingly ...
    • Stacking atomic layers: quest for new materials and physics 

      Kim, Philip (Georgia Institute of Technology, 2020-09-14)
      Modern electronics heavily rely on the technology to confine electrons in the interface layers of semiconductors. In recent years, scientists discovered that various atomically thin van der Waals (vdW) layered materials ...
    • The Statistical Mechanics of Graphene Membranes and Ribbons 

      Nelson, David (Georgia Institute of Technology, 2015-10-12)
      Understanding deformations of macroscopic thin plates and shells has a long and rich history, culminating with the Foeppl-von Karman equations in 1904. These highly nonlinear equations are characterized by a dimensionless ...
    • Statistical mechanics of the phase transition to turbulence: zonal flows, ecological collapse and extreme value statistics 

      Goldenfeld, Nigel (Georgia Institute of Technology, 2016-04-21)
      How do fluids become turbulent as their flow velocity is increased? In recent years, careful experiments in pipes and Taylor-Couette systems have revealed that the lifetime of transient turbulent regions in a fluid appears ...
    • Structured Graphene: from Ballistic Transport to Electronics 

      de Heer, Walt A. (Georgia Institute of Technology, 2013-12-02)
      The original concept of graphene electronics focused on carbon nanotube properties. Carbon nanotubes were known to be high mobility ballistic, phase coherent conductors and quantum confinement effects produced significant ...
    • Superconductivity: There's Plenty of Cream at the Bottom 

      Hirschfeld, Peter J. (Georgia Institute of Technology, 2020-10-19)
      In 1961, Brian Pippard gave a speech at IBM called "The Cat and the Cream", in which he declared that the superconductivity field was finished, at least for "young innocents who wish to break new ground": the cream was ...
    • Surveying the Accelerating Universe with Supernovae 

      Jha, Saurabh W. (Georgia Institute of Technology, 2012-03-05)
      In 1998 two rival teams of astronomers studying exploding white dwarf stars, called type Ia supernovae, came to the surprising conclusion that the expansion of the Universe is speeding up. This discovery of "the accelerating ...
    • Synchronization in Populations of Chemical Oscillators: Quorum Sensing, Phase Clusters and Chimeras 

      Showalter, Kenneth (Georgia Institute of Technology, 2015-11-30)
      We have studied large, heterogeneous populations of discrete chemical oscillators (~100,000) to characterize two different types of density-dependent transitions to synchronized behavior, a gradual Kuramoto synchronization ...
    • Testing Gravity via Lunar Laser Ranging 

      Murphy, Tom (Georgia Institute of Technology, 2013-11-11)
      Forty years ago, Apollo astronauts placed the first of several retroreflector arrays on the moon. Laser range measurements between the earth and the moon have provided some of our best tests to date of general relativity ...
    • Thin film topological insulators: where do we stand and where are we headed? 

      Oh, Seongshik (Georgia Institute of Technology, 2016-10-17)
      About a decade ago, a little after graphene was discovered, a few theoretical physicists proposed that all solids can be grouped into different classes according to their band structure topologies: depending on which group ...