Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session 1A: Graduate Student Symposium - Outstanding Answers to Outstanding QuestionsSpecial Event
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Chair: Heather Lewandowski, University of Colorado-Boulder Room: Ballroom 111 C |
Monday, June 5, 2023 8:55AM - 9:00AM |
1A.00001: Welcome and Introductions
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Monday, June 5, 2023 9:00AM - 10:15AM |
1A.00002: Seeking new physics at multi-TeV energies by searching for the electron's electric dipole moment Invited Speaker: David P DeMille Just as virtual emission and absorption of a photon--described by the famous one-loop Feynman diagram--modifies the electron's magnetic moment, virtual particles of other types can induce a nonzero electric dipole moment (EDM) of the electron. In particular, this is caused by particles mediating interactions that violate time-reversal symmetry. There is strong evidence new particles of this type must exist, in order to explain the cosmological dominance of matter over antimatter. Large accelerators such as the Large Hadron Collider have discovered no such particles, but--remarkably--searches for the EDM of the electron (and other particles) provide substantial hope for detecting them. Because the EDM induced by these particles gets smaller as the mass of the particles get larger, searching for the EDM with increasing sensitivity probes ever higher energy scales. Over the past decade, a new generation of experiments looking for the electron EDM has become so sensitive that they could detect the existence of certain new particles with mass hundreds of times greater than the Higgs boson mass--far beyond the reach of any current or planned accelerator. These cutting-edge particle physics experiments work by measuring the torque on the electron, when its EDM is subjected to the huge internal electric field of a polar molecule; each is accomplished using the methods of modern atomic and molecular physics, in a room-scale apparatus. In talk I will describe the underlying physics of electron EDM experiments, the current status of the field, and prospects for future improvements. |
Monday, June 5, 2023 10:15AM - 10:45AM |
1A.00003: Coffee Break I
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Monday, June 5, 2023 10:45AM - 12:00PM |
1A.00004: Absorb, store, and re-emit: Quantum memory via coherent light-matter interactions and collective atomic excitations Invited Speaker: Lindsay J LeBlanc Rooted in established phenomena like superradiance and electromagnetically induced transparency (EIT), the manipulation and storage of light by collective excitations among atoms has expanded beyond the realm of fundamental research and into the domain of applications as a platform for quantum memory, with near-term potential in quantum communications systems. Optical quantum memories coherently absorb, store, and re-emit light, which facilitates the transfer of (quantum) information from a photonic degree of freedom (which can be transmitted over long distances) to an atomic one (which is stationary and long-lived), and back again, sometimes on-demand. Here, we will explore the nature of the atom-light interactions that give rise to collective atomic excitations, how these collective excitations both preserve information and re-emit light, and how quantum information can be coherently transformed from photonic to atomic degrees of freedom. We will, in particular, consider the two-field Λ-configuration used to create a "spin-wave" among ground states, and look at how factors such as efficiency, noise, bandwidth, and multimode capacity can be optimized. Several flavours of atomic quantum memory will be discussed, including those with warm, cold, and ultracold atoms, using protocols including off-resonant Raman, EIT, and Autler-Townes Splitting (ATS). We will, through this exploration of quantum memories, have the opportunity to appreciate the duality of light as a tool to manipulate atomic states, and atomic states as a tool to manipulate the state of light. |
Monday, June 5, 2023 12:00PM - 12:45PM |
1A.00005: Lunch Break
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Monday, June 5, 2023 12:45PM - 2:00PM |
1A.00006: The Muon g-2 Experiment: A Precision Test of the Standard Model and Search for New Physics Invited Speaker: David M Kawall The Fermilab muon g-2 experiment recently released its first high precision measurement of the magnetic moment anomaly of the muon. Muons are like electrons, but heavier and short-lived. The magnetic moment anomaly quantifies the amount by which the g-factor of the muon differs from two, aμ=(gμ-2)/2. It's of interest because it can be predicted with impressive, sub-ppm precision through the techniques of quantum field theory. This prediction requires the careful consideration of quantum corrections that arise due the interactions of the muon with all the known fundamental particles of nature such as electrons, photons, W-bosons, etc. Comparison of experimental results with theoretical predictions then serves as a powerful test of the completeness of the Standard Model of nature. There is a long-standing discrepancy between the measured and predicted values of the muon magnetic momnent anomaly that might indicate the need for new physics. The concepts behind the Fermilab experiment and the many challenges it faces will be presented, along with the comparison with theory and future prospects. |
Monday, June 5, 2023 2:00PM - 2:30PM |
1A.00007: Coffee Break II
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Monday, June 5, 2023 2:30PM - 3:45PM |
1A.00008: Filming and viewing ultrafast motion inside molecules: What do we see and what can we learn? Invited Speaker: Philip H Bucksbaum The electrons and atoms inside molecules can rearrange rapidly during photoexcitation or collisions, moving angstroms in a few femtoseconds or less. This non-classical many-body quantum evolution is far too small and too fast to be resolved in any imaging microscope, but if we could film it, what should we expect to see? New tools based on ultrafast lasers, electron accelerators, and x-ray free-electron lasers have now begun to record this motion with increasing detail, and for a growing array of atomic and molecular systems. Here I will attempt to answer the question, "So what?" What have we learned, and how are molecular movies guiding us toward future discoveries in AMO physics? |
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