Colloquium
Junior and senior physics majors attend our biweekly colloquium series, held on Tuesday afternoons at 4:30 pm in Shanahan B460. The talks are open to all students and to the public, and are frequently attended by scientists from the other Claremont Colleges, Cal Poly Pomona, and others. The series features speakers from a broad range of institutions and fields of physics.
| March 23, 2021 | Franklin Dollar, University of California at Irvine Moore’s Law for Lawrence’s Device: Shrinking the Particle Accelerator |
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As Moore’s law continues to push forward semiconductor devices, we are now seeing commercial devices with feature sizes below 5 nanometers. Through the use of high power, short pulse lasers, a technology which warranted the 2018 Nobel Prize in Physics, an analogous revolution is set to occur in particle accelerators. These new laser driven accelerators can achieve efficient acceleration of particles … |
| March 16, 2021 | Clarice Aiello, University of California at Los Angeles From Nanotech to Living Sensors: Unraveling the Spin Physics of Biosensing at the Nanoscale |
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Substantial in vitro and physiological experimental results suggest that similar coherent spin |
| March 2, 2021 | Ken Davis, Massachusetts Institute of Technology BEC and the 2001 Nobel prize |
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In 2001 Wolfgang Ketterle won the Nobel prize in physics. The award was given for the observation of Bose Einstein condensation in a gas of sodium atoms. This experimental result was pursued with intensity for decades by experimental groups around the country and around the world. Learn what was novel about Ketterle’s approach and why it worked. Also learn about … |
| Feb. 23, 2021 | Alison M. Saunders, Lawrence Livermore National Laboratory Experiments on Materials at Extreme Conditions at High Power Laser Facilities |
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The field of High Energy Density Physics (HEDP) in an emerging field of physics that combines expertise from plasma and condensed matter physics to understand the behavior of materials at extreme conditions, such as those that exist at the center of the sun. Extreme conditions in the laboratory are generated through pressure applied statically or dynamically through shock compression. Lasers … |
| Feb. 8, 2021 | Cynthia Chiang, McGill University Illuminating the Dark Universe with Radio Observations |
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Redshifted 21-cm emission from neutral hydrogen is a powerful tool for observational cosmology research. Measurements across a wide range of radio frequencies allow us to access redshifts that encompass a vast comoving volume, spanning both cosmic dawn and the formation of large-scale structure. I will describe the HIRAX, PRIZM, and ALBATROS experiments, which aim to shed new light on the … |
| Feb. 2, 2021 | Alex Klotz, California State University, Long Beach Materials Physics with Kinetoplast DNA |
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The biological world is the source of many materials with exotic or desirable properties. Among these, DNA molecules have served as a model system to study the physics of polymers on the single-molecule level. A kinetoplast is an exotic form of DNA, found in certain tropical parasites, that consists of thousands of circular molecules topologically linked together like a sheet … |
| Jan. 26, 2021 | Casey Handmer, Jet Propulsion Laboratory Electrodynamic magnetic levitation |
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“Can we all have maglev trains? Why? Why not?” Dr. Casey Handmer from JPL will be presenting along with a Q&A session. Casey has a background in computational general relativity and gravitational waves. However, his interests are wide ranging. |
| Nov. 17, 2020 | Bonnie Buratti, Jet Propulsion Laboratory Pluto: Everything Strange and Wonderful we Learned from New Horizons. |
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| Oct. 27, 2020 | Saad Bhamla, Georgia Tech Research Institute Fast, Furious and Frugal: Soft matter principles in ultrafast organismal biophysics and low-cost science tools. |
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In this talk, I will share two stories. The first documents our journey into the world of extreme single cells that exhibit ultrafast contractions. Using the lens of soft matter physics, we will discover how these extraordinary cells leverage these rapid contractions to transmit signals over long distances in a phenomena we term ‘hydrodynamic communication’. The second explores development of … |
| March 31, 2020 | Christina Knapp, Caltech Quantum Computing with a Topological Phase of Matter |
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A central tenet of condensed matter physics is that the collective behavior of a system can be drastically different from that of its constituent parts. Topological phases of matter provide an especially dramatic example of this idea: the phase of matter cannot be identified within a local region, but is rather encoded in global properties of the system. As such, … |
| Feb. 18, 2020 | Jocelyn Read, California State University, Fullerton Learning about Neutron-rich Matter with Gravitational Waves |
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Astronomical observations of neutron stars inform our understanding of matter at the highest densities. Already, we have used gravitational-wave data from GW170817—the first signal from a neutron-star system—to constrain the equation of state of dense matter in neutron stars. More recently, the new heavy neutron-star merger GW190425 has indicated that the gravitational-wave population may include systems not previously observed as … |
| Dec. 10, 2019 | Vivien Zapf (’97), Los Alamos National Laboratory The National High Magnetic Field Lab and Magnetism influencing Ferroelectricity |
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TBA |
| Oct. 8, 2019 | Sarah Marzen, WM Keck Science Center How can we predict efficiently? |
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Organisms have to predict the future to best choose actions. How do they do it, especially given the resource constraints that govern their ability to process information? We evaluate the ability of machine learners, bio-inspired neural networks, neurons, and humans to predict and memorize, with surprising preliminary findings. |
| April 30, 2019 | Vedika Khemani, Harvard University Quantum Matter Out of Equilibrium |
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Statistical mechanics is one of the foundational pillars of modern physics. At its core is the idea of thermal equilibrium, which allows for a simple description of a many-particle system in terms of a few macroscopic, equilibrium properties like temperature or pressure. Although many of the fundamentals of quantum statistical mechanics were formulated almost a century ago, recent developments have … |
| April 23, 2019 | Alex Frañó, University of California at San Diego The “quantumness” of quantum materials explored by resonant x-ray scattering |
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We are in exciting times for synchrotron science and condensed matter physics. Modern x-ray experiments offer a powerful tool to address fundamental questions about materials. In this colloquium, I will illustrate some intriguing cases involving materials in which electronic correlations yield intertwined, ordered patterns of the spin, charge and orbital character of the wave functions. I will discuss x-ray scattering … |
