Bulletin of the American Physical Society
Four Corners Section 2022 Meeting
Volume 67, Number 14
Friday–Saturday, October 14–15, 2022; Albuquerque, New Mexico
Session N01: Plenary III |
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Chair: Pearl Sandick, University of Utah Room: UNM PAIS 1100 |
Saturday, October 15, 2022 3:15PM - 3:45PM |
N01.00001: Circumventing the Diffraction Limit to Observe Nanoscale Protein Interactions Invited Speaker: Keith Lidke Due to the near transparency of cells, optical imaging is well suited for studying live or intact cells. Tagging cellular components with fluorophores dramatically extends these capabilities by providing molecular specificity and improved contrast. However, the light microscope is limited by diffraction to ~ 300 nm, whereas many important events for cell function and signaling involve interactions of proteins that occur at the ~ 10 nm scale. I will discuss methods for circumventing the diffraction limit using single molecule fluorescence imaging and quantitative analyses to extract biologically meaningful information from noisy images. The concepts of (super)resolution, classical and quantum limits of estimation, and Bayesian inference will form the backdrop of the discussion |
Saturday, October 15, 2022 3:45PM - 4:15PM |
N01.00002: Precision measurement and control of atomic hydrogen Invited Speaker: Dylan C Yost Because of atomic hydrogen's simplicity, its energy levels can be precisely described by theory. This has made hydrogen an important atom in the development of quantum mechanics and quantum electrodynamics (QED). At present, assuming the QED calculations for hydrogen are correct, one can use hydrogen spectroscopy to determine the Rydberg constant and the proton-charge radius. A discrepancy of these constants determined through different transitions, or in different species, can indicate new physics. Unfortunately, spectroscopy of hydrogen is often limited by the temperature of the atomic sample, and laser cooling is very challenging since the wavelength of the radiation required is well into the vacuum ultraviolet (121.57 nm). In this talk, I will present new results where we load a metastable hydrogen beam into a moving optical lattice, which we then decelerate to control the motion of the atoms. This technique offers a robust means to slow atomic hydrogen with visible lasers, which could provide a platform for increased precision. In addition, I will discuss our measurement of the hydrogen 2S-8D two-photon transition performed in our group, which produces tension within the global dataset of precision hydrogen spectroscopy measurements. |
Saturday, October 15, 2022 4:15PM - 4:45PM |
N01.00003: Black Holes, the invisible secrets of our Universe Invited Speaker: Maria J Rodriguez Invisible to our eyes, secretly hiding in Universe are black holes. Now, unprecedented advances in black hole imaging and gravitational wave detections are allowing us physicists to cast the regions near black holes. Scientists in disparate fields are simultaneously looking at these data and attempting to account for the black hole's mysterious imprints. Which are these black holes imprints? How do we model them? What is the future of scientific discovery in black hole physics? These are some of the questions I will address during this talk. |
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N01.00004: Plenary III Zoom Link https://unm.zoom.us/j/95183203656?pwd=aWQybklrRGNpaEFmVUZOSDRWeDdlQT09 |
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