• Monday, February 6, 2017 - 12:10pm to 1:00pm  ·  Colloquium
    Dr. Philip Ilten

    Abstract: The nature of dark matter cannot be explained by the standard model of particle physics and remains a prominent open question in physics.

    With no dark matter signals found at the LHC, interest has been renewed in treating dark matter as a hidden sector with a weak connection to the standard model. Here I will explore searching for the dark photon, a possible portal between dark matter and the standard model.

     

  • Thursday, February 2, 2017 - 4:10pm to 5:10pm  ·  Colloquium
    Dr. William East, Perimeter Institute for Theoretical Physics

    Abstract: With the groundbreaking detections of gravitational waves from merging black holes by LIGO, we have entered the era where we can actually observe the dynamics of strongly curved spacetime originally predicted by Einstein.  Going hand in hand with this, there has been a renaissance in theoretical and computational tools we use to understand and interpret the dynamics of gravity and matter in this regime.  I will describe some of the rich behavior ex

  • Monday, January 30, 2017 - 3:40pm to 4:40pm  ·  Colloquium
    Dr. Vasileios Paschalidis, Princeton University

    Abstract: The LIGO and VIRGO collaborations recently announced the first direct detections of gravitational waves (GW) corresponding to the inspiral and merger of stellar-mass black hole-black hole (BHBH) binaries in vacuum. In addition to GWs from other vacuum BHBH binaries, GWs from compact binaries involving neutron stars are also expected to be detected in the next few years. Moreover, distinct observable electromagnetic (EM) radiation may accompany these GWs.

  • Thursday, January 26, 2017 - 4:10pm to 5:10pm  ·  Colloquium
    Dr. Alexander Tchekhovskoy, UC Berkeley

    Abstract: Black holes are responsible for a wide range of astrophysical phenomena. They devour stars, emit gravitational waves, eject relativistic jets, affect star formation and galaxy evolution, and enrich the Universe with heavy elements. I will discuss how global general relativistic magnetized fluid dynamics numerical simulations allow us to use this activity to quantitatively probe strong-field gravity and constrain black hole physics in a wide range of astrophysical systems. I will finish by making connections to my future research plans.

  • Monday, January 23, 2017 - 2:30pm to 3:30pm  ·  Colloquium
    Dr. Francois Foucart, Lawrence Berkeley National Laboratory

    Abstract: Black holes and neutron stars are extraordinary astrophysical laboratories. They allow us to test the laws of gravity and nuclear physics in extreme environments which cannot be reproduced on Earth. In this talk, I will discuss efforts to model these compact objects in two classes of astrophysical systems: mergers of black hole-neutron star and neutron star-neutron star binaries, and accretion disks around supermassive black holes. The first are powerful sources of gravitational waves, and emit bright electromagnetic transients.

  • Friday, December 9, 2016 - 4:00pm  ·  Colloquium
    Prof. Oleg Tchernyshyov, The Johns Hopkins University

    Magnets host a variety of solitons: domain walls, vortices, and skyrmions, to name a few. Protected by their nontrivial topology, these solitons can be used for storing and processing information. This motivates us to build economic, yet realistic models of soliton dynamics in magnets. I will review the behavior of magnetic solitons in one, two, and three dimensions. 

  • Friday, November 4, 2016 - 4:00pm  ·  Colloquium
    Prof. Matthew White, University of Vermont

    Solution-processed semiconductor devices, including perovskite and organic photovoltaics and organic LEDs, are inherently thin-film technologies. Therefore.

  • Friday, October 28, 2016 - 4:00pm  ·  Colloquium
    Prof. Marc Lessard, University of New Hampshire

    The Sun delivers energy to Earth in the form of a magnetized plasma called the solar wind. As that plasma impacts Earth’s magnetic field, a variety of processes evolve that enable the transfer of much of that energy to our ionosphere, producing spectacular auroral displays in the process. Not surprisingly, some of the energy is also transferred to our neutral upper atmosphere (the "thermosphere”).

  • Friday, October 21, 2016 - 4:00pm to 5:00pm  ·  Colloquium
    Prof. Joe Checkelsky, Massachusetts Institute of Technology

    Abstract:  A goal of the exploration of new quantum materials is the development of solid state systems with new functionalities.  Topological Insulators are a new class of quantum materials which have recently become of great interest to the physics community- these materials have electronic states that are in some ways fundamentally more robust against disorder than conventional electronic systems.  At the forefront of research in these systems is the attempt to capitalize on this unique aspect of these materials to realize new electronic capabilities.  Here we review our

  • Friday, May 6, 2016 - 2:00pm to 3:00pm  ·  Colloquium
    • 02:00pm – 02:20pm: Nicholas Marcellino: Using Monte Carlo Simulations to Model Positron Clouds in Thunderstorms
    • 02:20pm – 02:40pm: Brendan Batty, Lisa Bouchard, Tessa Gorte, Patrick Hampson, Daniel Jellis Brent Lawson, Aaron Rago: Induction into Sigma Pi Sigma
    • 03:10pm – 03:30pm: Zain Abbas: Analyzing the Efficiency of a Mass Spectrometer for Magnetospheric Observations
    • 03:30pm – 03:50pm: Dereck Gervais: Developing and Assessing Viscosity Curriculum for Introductory Physics for the Life Science