Past Events

  • Topology Workshop: “Identifying Order in Complex Systems”

    David Rittenhouse Laboratory, A4

    Joel Hass, University of California - “Metrics on the Space of Shapes, and Applications to Biology”

    Vidit Nanda, University of Pennsylvania  – “A Topological Predictor of Protein Compressibility”

    Corey O'Hern, Yale University  -  “Volumes of the Basins of Attraction for Mechanically Stable Disk Packings”

    Konstantin Mischaikow, Rutgers University – “Towards a Homological Description of Nonlinear Dynamics”



  • Astro Seminar: "The Cosmic Ballet of Black Holes and Gravitational Waves"

    David Rittenhouse Laboratory, A8

    Laura Cadonati (Georgia Tech, Center for Relativistic Astrophysics)

    One hundred years after Einstein's formulation of General Relativity, Advanced LIGO has detected for the first time gravitational waves, ripples in the fabric of spacetime that are produced by cataclysmic astrophysical event. 1.3 billion years ago, two black holes inspiraled and merged, releasing a power that is 50 times that of the visible universe, in the form of gravitational waves, which reached Earth on the morning of September 14, 2015.

  • High Energy Theory: "New Frontiers in Entanglement" Pt. 2

    David Rittenhouse Laboratory, 4N12

    10:30-11am: Welcome coffee

    11am -12:30pm: Herman Verlinde (Princeton) Talk/Presentation

  • ABO Seminars: "Insights Into Hallmarks of Early Carcinogenesis Using Nanoscale-sensing Optical Microscopy"

    Donner Building 3400 Spruce Street Donner Auditorium, Basement *Pizza served at 11:45am*

    Vadim Backman (Northwestern University)

    Initiation of carcinogenesis is accompanied by alterations in tumor microenvironment, cellular metabolism and epigenetics. Understanding these early events depends on our ability to image these subtle nanoarchitectural and functional processes. The talk discusses a suit of novel in vivo and in vitro optical imaging techniques that have recently been developed to quantify intracellular and tissue morphology at the nanoscale and provide high-resolution imaging of metabolism and microangiography.

  • High Energy Theory: "New Frontiers in Entanglement" Pt.1

    David Rittenhouse Laboratory 4N12

    Thursday, April 7:

    10:30-11am: Welcome coffee

  • Condensed Matter seminar: "Designing quantum matter with superconducting nanowires"

    David Rittenhouse Laboratory, A4

    Nina Markovic, Goucher College

    Superconducting nanowires are an experimental realization of a model quantum system that features collective degrees of freedom and exhibits a host of non-equilibrium and non-local phenomena. The nature of the quantum states in nanowires is particularly sensitive to size and shape quantization, coupling with the environment and proximity effects.

  • Condensed Matter seminar: "Nano-photonic phenomena in van der Waals heterostructures"

    David Rittenhouse Laboratory, A4

    Dimitri Basov, Columbia University

    Layered van der Waals (vdW) crystals consist of individual atomic planes weakly coupled by vdW interaction, similar to graphene monolayers in bulk graphite. These materials can harbor superconductivity and ferromagnetism with high transition temperatures, emit light and exhibit topologically protected surface states. An ambitious practical goal is to exploit atomic planes of vdW crystals as building blocks of more complex artificially stacked heterostructures where each such block will deliver layer-specific attributes for the purpose of their combined functionality.

  • Astro Seminar: "Exodynamos: Magnetic Field Generation and Detectability"

    David Rittenhouse Laboratory, A4


    Planetary magnetic fields are ubiquitous in the Solar System and extrasolar planets are common in the galaxy.  However, no extrasolar planetary magnetic field (or exodynamo) has yet been directly detected. Magnetic fields offer a unique window into the internal structure and dynamics of planets, can be remotely detected by electron cyclotron emission at radio wavelengths, and are commonly assumed to be important for surface habitability.

  • Condensed Matter seminar: "Braiding Light"

    David Rittenhouse Laboratory, A4

    Claudio Chamon, Boston University

    Many topological phenomena first proposed and observed in the context of electrons in solids have recently found counterparts in optical and acoustic systems. In this talk I will discuss non-Abelian Berry phases that can accumulate when coherent states of light are injected into “topological guided modes” in specially-fabricated photonic waveguide arrays. These modes are photonic analogues of topological zero modes  in electronic systems.

  • Astro Seminar: "Beyond Pluto: The Hunt for Planet X"

    David Rittenhouse Laboratory, A4

    Scott Sheppard (Carnegie Institution for Science)

    The Kuiper Belt, which has Pluto as the largest member, is a region of comet like objects just beyond Neptune.  This belt of objects has an outer edge, which we are now only able to explore in detail.  For the past few years we have been performing the largest and deepest survey ever obtained to search for distant solar system objects.