Skip to Content

Colloquia and Seminars

Our department hosts regular guest lectures, colloquia and seminars showcasing research from visiting scholars, faculty and students.

Find us in Olin 105 on Wednesdays from 4:00-5:00 p.m. during fall, winter and spring quarters.

Upcoming talks:

September 25, 2019

Exploiting Geometry and Disorder in Exotic Quantum States of Matter

Rudro R. Biswas, PhD
Assistant Professor of Physics and Astronomy
Purdue University

Abstract: 

Quantum Hall states are a prominent example of exotic topological states of matter. The signature property of QH states, namely, the quantization of Hall conductance, is well-appreciated, and independent of sample-specific details, to the extent that it is used for precise measurements of fundamental constants.

Less well understood, and at the frontier of current research, is how the geometry of these states responds to gravitational perturbations, i.e., deformations to the real space manifold they are embedded in, and what if any universal signatures characterize this response. In this talk I will discuss how remarkable new universal behaviors emerge when probing the gravitational response of quantum Hall states.

By exploiting novel aspects of the quantum geometry of charged particles in a magnetic field, I will show that these responses can be characterized not only by considering QH states in curved spaces, but equivalently, by placing them in non-uniform electric fields, thus facilitating experimental tests of these results.

I will conclude by noting how the quantum geometry can be combined with the theory of coherent states to provide an analytical route, hitherto elusive, for deriving the properties of fractional quantum Hall phases from experimentally relevant microscopic Hamiltonians.

Upcoming Talks

  • Fall 2019 Schedule

    October 5: Prof. Mingzhong Wu, Department of Physics, Colorado State University

    October 9: Dr. Vivek Amin, Electron Physics Group, National Institute of Standards and Technology (NIST)

    October 16:  Dr. Mark Steger, National Renewable Energy Laboratory (NREL)

    October 23:  Dr. Johannes Löhner-Böttcher, High Altitude Observatory, National Center for Atmospheric Research

    October 30:  Prof. Takahiro Moriyama, Division of Materials Chemistry, University of Tokyo

Past Speakers and Topics

  • Spring 2019

    June 5
    Investigating New Methods to Improve Perovskite Solar Cells
    Amani Alfaifi, Doctoral Candidate, University of Denver

    May 29
    Multi-Generational Analysis and Manipulation of Chromosomes in Polyploid Cyanobacteria
    Jeffery Cameron, Assistant Professor of Biochemistry, University of Colorado Boulder

    May 22
    Looking at Life through Randomness
    Susanta Sarkar, Assistant Professor of Physics
    Colorado School of Mines

    May 15
    Spintronics Metrology with Magnetic Oscillators
    Emilie Jué, Research Physicist
    National Institute of Standards and Technology (NIST)

    May 1
    First-Year Graduate Student Research Presentations
    Sam Bleser – Spin Transport in Crystalline Si and Ge
    Leopoldo Hernandez – Spin Transport in a- Cr2O3
    Rachel Johnson – Shedding Polarized Light on Long-Duration Gamma Ray
    David Melnick – Imaging of Dust Shells: A Status
    Matt Natale – Thermoelectric Properties of Carbon Nanotube Networks
    Charles Payne – Vortices in Polariton Condensates

    April 17
    Engineering Exchange Interactions in Complex Oxide Systems
    Yayoi Takamura, Professor and Vice Chair of Materials Science and Engineering
    University of California, Davis
    Marsico Visiting Scholar

    April 16
    Revealing the Hidden Universe with Supercomputer Simulations of Black Hole Mergers
    Manuela Campanelli, Director
    Center for Computational Relativity and Gravitation
    Rochester Institute of Technology

    April 10
    Diagnosing Light Pollution Sources: The Physics and Potential Remediation
    Robert Stencel, William Herschel Womble Astronomy Professor
    University of Denver
    Herbert Howe Lecture

    April 9
    Facilitating Thinking and Learning in and beyond the STEM Disciplines
    Chandralekha Singh, Director
    Discipline-Based Science Education Research Center, University of Pittsburgh

  • Winter 2019

    March 13
    Infrared Laser Technology: From Ultrafast Thulium Fiber Lasers to Mid-Infrared Vibrational Photothermal Imaging
    Michelle Sander, Assistant Professor of Electrical and Computer Engineering
    Boston University

    Current-Induced Magnetization Control and Spin Transport in Ferromagnetic Heterostructures
    Can Onur Avci, Senior Postdoc
    ETH Zurich

    March 6
    Optical Study of the Fermi Liquid Behavior of a Sr2RuO4
    Will Holtzman, Undergraduate Student
    University of Denver

    Computational Study of Higgs and z-Bozon Decays
    Abigail Grotelueschen, Undergraduate Student
    University of Denver

    February 27
    From the Climate on Pluto to the Weather on I-70: Problems a Physicist Can Solve
    Dr. Angela Zalucha, Data Scientist
    Panasonic Automotive

    February 20
    Next-Generation Computational Imaging and Massively-Multiplexed Metrologies
    Daniel Adams, Assistant Professor of Physics
    Colorado School of Mines

    February 19
    Coupling of Light's Orbital Angular Momentum to a Quantum Dot Ensemble (Dissertation Defense)
    Alaa Bahamran, Graduate Research Assistant
    University of Denver

    February 15
    Quantitative Aspects of Interface Remodeling During Germband Extension (Dissertation Defense)
    Tim Vanderleest, Graduate Research Assistant
    University of Denver

    February 13
    Realizing the Volt in the Quantum SI
    Anna Fox, Quantum Electromagnetics Division
    National Institute of Standards and Technology (NIST)

    February 6
    Adaptive and Nonlinear Optical Devices
    Juliet Gopinath, Associate Professor of Electrical Computer and Energy Engineering
    University of Colorado Boulder

    January 30
    Alien Worlds Transiting the Closest Stars in the Sky
    Zachory Berta-Thompson,  Assistant Professor of Astronomy and Planetary Sciences
    University of Colorado Boulder

    January 23
    Resistance Is Not Futile: Pinning Down Elusive Vortices in Superconductors
    Serena Eley, Assistant Professor of Physics
    Colorado School of Mines

    January 16
    Metamorphosis: New Views of Supernovae and Progenitors
    Jennifer Hoffman, Associate Professor of Physics and Astronomy
    University of Denver 

  • Fall 2018

    November 14
    Bringing the Microscope to the Mouse
    Emily Gibson, Assistant Professor of Bioengineering
    University of Colorado Denver

    November 7
    Analytical Methods in the Geosciences: Developing a Geochemical Model for the Highest-Grade Uranium Deposit in the World
    John DeDecker, PhD Candidate
    Colorado School of Mines

    October 31
    The Science of WFIRST: And Upcoming NASA Flagship Observatory
    Sarah Lipscy, OMPS Deputy Program Manager and Instrument Scientist
    Ball Aerospace

    October 24
    Single Flux Quantum-Based Neuromorphic Computing
    Michael Schneider, Physicist
    National Institute of Standards and Technology (NIST)

    October 17
    Highly-Relativistic Ultrashort Pulse Laser Interaction with Nanostructures: X-Ray and Neutron Generation
    Jorge Rocca, University Distinguished Professor of Electrical and Computer Engineering
    Colorado State University

    October 10
    Dinah Loerke, Associate Professor of Biophysics
    University of Denver

    September 26
    Magnetic Nanostructures for Information Storage and Processing
    Dan Read, Senior Lecturer, Condensed Matter and Photonics Group
    Cardiff University School of Physics and Astronomy

    September 19
    Shedding Light on Quantum Turbulence
    Sam Alperin, Graduate Student
    University of Denver/Cambridge University

    September 12
    Research Overview
    DU Department of Physics and Astronomy faculty