Bulletin of the American Physical Society
2018 Annual Meeting of the APS Four Corners Section
Volume 63, Number 16
Friday–Saturday, October 12–13, 2018; University of Utah, Salt Lake City, Utah
Session F01: Plenary II |
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Chair: Susan Rempe, Sandia National Lab Room: Aline Wilmot Skaggs Biology Building 220 |
Friday, October 12, 2018 3:15PM - 3:51PM |
F01.00001: New Dimensions in Ultrafast Spectroscopy Reveal Ancient Secrets of Photosynthesis Invited Speaker: David Jonas In photosynthesis, antenna proteins harvest light and efficiently transfer the electronic excitation energy to reaction center proteins that initiate chemical transformations. The standard Forster framework for understanding electronic energy transfer is based on the adiabatic approximation of slow vibrations and fast electronic motions. Femtosecond two-dimensional spectra of many antenna proteins exhibit quantum beats with signatures indicative of nonadiabatic vibrational-electronic coupling. The longest lived beats originate from a nonadiabatic enhancement of Raman pathways for excitation of delocalized vibrations on the electronic ground state. These vibrations characterize the initial coupling between excited states and reveal nested funnels in which the adiabatic approximation fails spectacularly over entire vibrational coordinate spaces. The nonadiabatic dynamics in nested funnels is efficient at low vibrational energies and does not require the high vibrational velocities usually associated with breakdown of the adiabatic approximation. Nested funnel design principles will be discussed. |
Friday, October 12, 2018 3:51PM - 4:27PM |
F01.00002: Diamond Magnetic Microscopy Invited Speaker: Victor Acosta The nitrogen-vacancy color center in diamond is an attractive candidate for solid-state quantum sensing and imaging. I will discuss ongoing experiments in our labs at the University of New Mexico that use diamond quantum sensing to explore nanoscale magnetic phenomena in biological systems. These include microfluidic nuclear magnetic resonance spectroscopy [1] and magnetic microscopy of malarial hemozoin nanocrystals [2]. |
Friday, October 12, 2018 4:27PM - 5:03PM |
F01.00003: New Frontiers in Fundamental Black Hole Physics Invited Speaker: Maria J. Rodriguez In addition to not letting anything escape from inside, some black holes produce striking shadows and spectacular jets. The latest discoveries on black holes in the Universe have prompted great advances in the theoretical description of the phenomena produced by these mysterious objects. In this talk, I will review the challenges associated with deciphering these fundamental aspects of black holes and report on the progress made in solving some of these queries. |
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