Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session A01: DAMOP Prize SessionInvited Live Plenary Prize/Award
|
Hide Abstracts |
Chair: Jun Ye, University of Colorado, Boulder |
Tuesday, June 1, 2021 8:00AM - 8:25AM Live |
A01.00001: Davisson-Germer Prize in Atomic or Surface Physics: Exploring the Atomic and Electronic Landscape of Low-Dimensional Materials Invited Speaker: Michael F Crommie When materials are probed at the smallest length scales their quantum mechanical properties become highly apparent. The scanning tunneling microscope (STM) provides an ideal tool for visualizing this behavior down to the atomic scale. I will discuss how cryogenic scanning tunneling microscopy techniques can be used to both probe the local electronic properties of materials as well as to modify them via atomic manipulation. This enables, for example, precise electron confinement structures (quantum corrals) to be constructed from individual atoms, thus providing a means to directly visualize the effects of electronic quantum interference at the nanoscale. Integration of these techniques with atomically-thin 2D materials such as graphene provides a completely new window into low-dimensional electronic behavior. I will describe how characterization of graphene via cryogenic STM has enabled ultra-relativistic behavior such as atomic collapse and Dirac fermion quantum confinement to be directly imaged in gated graphene devices. By reducing the dimensionality of graphene into 1D strips (i.e., graphene nanoribbons (GNRs)) it is possible to flexibly alter graphene’s electronic structure even further, ranging from tunable semiconducting behavior all the way to robust metallicity. I will discuss how GNRs having different atomically-precise structures can be fabricated using “bottom-up” synthesis techniques involving molecular self-assembly and then interrogated via STM. Such measurements have enabled the topological properties of GNRs to be directly visualized, thus providing a powerful new strategy for engineering the electronic properties of low-dimensional materials. |
Tuesday, June 1, 2021 8:25AM - 8:50AM Live |
A01.00002: Herbert P. Broida Prize: Laser Cooling of Polyatomic Molecules Invited Speaker: John M Doyle The tremendous scientific opportunities presented by ultracold molecules have driven rapid progress in both the assembly of diatomic molecules from ultracold atoms and the direct cooling of diatomic and polyatomic molecules. Diatomic species have been magneto-optically trapped and sub-Doppler cooled and their collisions have been studied in several experimental systems, including magnetic traps and merged optical tweezers. The pioneering work that led to advances in direct cooling began with Stark deceleration, buffer-gas cooling and loading of traps, buffer-gas beam sources, mechanical slowing, and a variety of electromagnetic trapping and cooling mechanisms. As the field of cold and ultracold molecules has grown, polyatomic molecules have attracted new focus as potential novel quantum resources that have distinct advantages (and challenges) compared to both atoms and diatomic molecules. For example, all polyatomic molecules have long-lived states arising from nuclear motion with angular momentum about the internuclear axis. These states exhibit linear, Debye-level Stark shifts at very low applied electric fields and offer distinct Stark-shifted level structures that are absent in laser-coolable diatomic molecules. These and other features in polyatomic molecules can be applied to quantum simulation and to searches for both dark matter and other particle physics beyond the Standard Model, potentially at the 1 PeV scale. Generic classes of polyatomic molecules have been identified as amenable to laser cooling into the ultracold (~1 μK) regime. One class is that of metal oxide radicals, which includes linear, symmetric top, and asymmetric top species. In this talk, I will discuss some of the past experiments that brought us to this point, and the challenges and scientific opportunities with the laser cooling of polyatomic molecules. Results on SrOH, YbOH, CaOH and CaOCH3 will be discussed, as well as preliminary work on more complex species. |
Tuesday, June 1, 2021 8:50AM - 9:15AM Live |
A01.00003: I.I. Rabi Prize in Atomic, Molecular, and Optical Physics: Choreographing Quantum Spin Dynamics with Light Invited Speaker: Monika H Schleier-Smith The power of quantum information lies in its capacity to be non-local, encoded in correlations among entangled particles. Yet our ability to produce, understand, and exploit such correlations is hampered by the fact that the interactions between particles are ordinarily local. I will report on experiments in which we use light to engineer non-local interactions among cold atoms, harnessing an optical resonator as a conduit for photons to convey information between distant atoms. We attain arbitrary control over the distance-dependence of spin-spin couplings in an array of atomic ensembles by programming the frequency spectrum of a drive field. We harness this programmability to access interaction graphs conducive to frustration and to explore quantum spin dynamics in exotic geometries and topologies. More broadly, advances in optical control of interactions open new opportunities in areas ranging from quantum technologies to fundamental physics. I will touch on prospects in quantum-enhanced sensing, combinatorial optimization, and simulating toy models of quantum gravity. |
Tuesday, June 1, 2021 9:15AM - 9:40AM Live |
A01.00004: Norman F. Ramsey Prize in Atomic, Molecular and Optical Physics, and in Precision Tests of Fundamental Laws and Symmetries: From zero-field magnetic resonance to gamma rays Invited Speaker: Dmitry Budker Atomic, molecular, and optical physics continues the tradition of Norman F. Ramsey to push the limits of technology, contribute to other disciplines, and seek answers to fundamental questions. We will illustrate this with examples based on the recent collaborative work, including development of zero- to ultralow-field nuclear magnetic resonance, remote measurements of magnetic fields, and searches for dark matter. Finally, we will mention a proposal to use high-energy accelerators (such as the LHC at CERN) as "ion traps" for fundamental physics and a bright sources of tunable narrow-band gamma rays. |
Tuesday, June 1, 2021 9:40AM - 10:05AM Live |
A01.00005: Francis M. Pipkin Award: State-of-the-Art Optical Clocks and the Search for New Physics Invited Speaker: Andrew D Ludlow Atomic clocks based on electronic transitions in the optical domain are now capable of measuring time |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700