## 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.
 Oct. 12, 2021 Kaveh Pezeshki, Rebecca Chan, and Noah Haig and Harry Sanchez (MIT/Lincoln Labs Clinic), Harvey Mudd College Senior Theses Talks #2 Please join us on Tuesday, 10/12/21 at 4:30pm as three HMC physics majors talk about their senior theses. Kaveh Pezeshki: "Charge Density Waves in GdTe3 Thin Films"Rebecca Chan: "Theoretical Study of Quantum Spin Liquid Candidate Na2BaCo(PO4)2"Noah Haig and Harry Sanchez, MIT/Lincoln Labs Clinic: " Drones with Software Defined Radio" https://hmc-edu.zoom.us/j/95095907033?pwd=SFlLVmNIakZEOS95anMyWFFzcnNFdz09 Oct. 5, 2021 Georgia Newman, Chloe Taylor, and Rafael Porto, Harvey Mudd College Senior Theses Talks Please join us on Tuesday, 10/5/21 at 4:30pm as three HMC physics majors talk about their senior theses.   Georgia Newman: “Anisotropic Magnetoresistance of Single Crystal FeRh Thin Films” Chloe Taylor: “Large Interlayer Exchange Coupling and Perpendicular Magnetic Anisotropy in Ir-based Synthetic Antiferromagnets”Rafael Porto: “Dark Matter and Freeze-in Leptogenesis” Sept. 28, 2021 Prof. Brian Shuve, Harvey Mudd College How (Not) to Give a Talk Join us as Prof. Shuve leads our discussion on how to give effective talks and what to avoid to prevent 'losing' your audience. This meeting will be virtual, so please use the zoom link below. https://hmc-edu.zoom.us/j/95095907033?pwd=SFlLVmNIakZEOS95anMyWFFzcnNFdz09 Sept. 21, 2021 Wylie Rosenthal '12, Carla Becker '18, Colin Adams '19, and Rachel Barcklay '20, Harvey Mudd College Alumni Career Session Four HMC alumni will discuss their career paths after leaving HMC. This is your chance to pick their brains and ask them questions about getting a job and what life after college is like. This meeting will be virtual, so please use the zoom link below. https://hmc-edu.zoom.us/j/91887995671?pwd=b0hMTEkxWk5oTTUwVUlXWnA2cDFsQT09 Sept. 14, 2021 Various HMC Physics Faculty, Harvey Mudd College Fellowships and Scholarships 101 This colloquium will be about fellowships and scholarships as they apply to graduate school and post-baccalaureate programs. We will also be presenting the Bell, Rojansky, Townsend, and Physics Community Awards. This meeting will be virtual, so please use the zoom link below. https://hmc-edu.zoom.us/j/94410726749?pwd=VFBpcWQ0R29KN09lcDlyTHc4djZ0dz09   (image from flaticon.com) Sept. 7, 2021 Various HMC Physics Faculty, Harvey Mudd College Graduate School 101 This colloquium will be an informational meeting about graduate school, so bring your burning questions in! Various HMC Physics Faculty will talk about graduate programs and options. The application process will also be discussed. This will be virtual, so please use the zoom link below.   https://hmc-edu.zoom.us/j/92600018400?pwd=YkNsQjh6b1g3VGZlQVh3WktNQTFJQT09 April 27, 2021 Trieu Mai, National Renewable Energy Laboratory 100% Renewable Electricity for the U.S.: Is it possible? Would it be enough? A key pillar to decarbonizing the energy system is to clean up the electricity system primarily through renewable resources like wind and solar. Numerous studies have examined the impact of greater deployment of these technologies and new ambitions call for renewable energy to provide 100% of U.S. electricity generation—for example, President Biden calls for 100% clean energy by 2035. Over … April 13, 2021 Dave Stegman, Scripps Institution of Oceanography A Brief History of Earth’s Magnetic Field The initial condition of the Earth, following a moon-forming impact, was likely to be a completely molten state, and estimates of the melting curve for lower mantle compositions indicate that the magma ocean would solidify from the middle out, trapping about 1000 km of molten mantle between the core and overlying solid mantle, referred … April 6, 2021 Michael T. Montgomery, Naval Postgraduate School The Dynamics of Tropical Cyclogenesis and Intensification To forecast tropical cyclones, or to determine possible changes in their climatology as a result of global warming, we need a conceptual model of how tropical cyclones work. How do tropical cyclones form, intensity, and decay? Why do these storms sometimes intensify rapidly, surprising tropical forecasters in charge of protecting life and property for communities affected by these life-threatening … March 30, 2021 Srividya Iyer-Biswas, Purdue University How Life Shapes Time There has been a longstanding quest for uncovering the quantitative laws governing the stochastic growth and division of individual cells. While great strides have been made in unravelling and modeling the details of the gene regulatory networks which dictate growth and division for different organisms, there is a regrettable paucity of quantitative physical laws derived from the complementary “top down” … March 23, 2021 Franklin Dollar, University of California at Irvine Moore’s Law for Lawrence’s Device: Shrinking the Particle Accelerator 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 Substantial in vitro and physiological experimental results suggest that similar coherent spinphysics might underlie phenomena as varied as the biosensing of magnetic fields in animalnavigation and the magnetosensitivity of metabolic reactions related to oxidative stress incells. If this is correct, organisms might behave, for a short time, as “living quantum sensors”and might be studied and controlled … March 2, 2021 Ken Davis, Massachusetts Institute of Technology BEC and the 2001 Nobel prize 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 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 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 …