Bulletin of the American Physical Society
49th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics APS Meeting
Volume 63, Number 5
Monday–Friday, May 28–June 1 2018; Ft. Lauderdale, Florida
Session B01: Plenary Prize Session |
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Chair: Robert Jones, University of Virginia Room: Grand Ballroom A/B |
Tuesday, May 29, 2018 8:00AM - 8:30AM |
B01.00001: Davisson-Germer Prize in Atomic or Surface Physics talk: Unitary Strongly Interacting Fermi Gases Invited Speaker: John Thomas Optically-trapped, ultra-cold gases of spin 1/2-up and spin-1/2 down $^6$Li atoms model high temperature superconductors, neutron matter, and even the quark-gluon plasma that existed microseconds after the Big Bang. A bias magnetic field tunes the gas to a collisional (Feshbach) resonance, where the dilute atomic cloud becomes a strongly interacting, scale-invariant quantum fluid, known as a ``Unitary" Fermi gas. I will briefly describe our early work leading to studies of the universal thermodynamic and transport properties of unitary Fermi gases, our recent measurements of quantum viscosity, and our current experiments. [Preview Abstract] |
Tuesday, May 29, 2018 8:30AM - 9:00AM |
B01.00002: 2017 Maria Goeppert Mayer Award Talk: Quantum Nanophotonics Invited Speaker: Maiken Mikkelsen Tiny gaps between metals enables extreme field enhancements and strongly modified light-matter interactions promising for ultrafast optoelectronics, energy applications and on-chip components for quantum information processing. We use creative nanofabrication techniques at the interface between chemistry and physics to realize nanostructures with critical dimensions on the atomic- and molecular-scale (~1-10 nm), together with advanced, ultrafast optical techniques to probe the emerging phenomena. Here, I will provide an overview of our recent research demonstrating tailored light-matter interactions by leveraging ultra-small plasmonic cavities fabricated with bottom-up techniques. Examples of our demonstrations include 1,000-fold Purcell enhancements [Nature Photonics 8, 835 (2014)], ultrafast single photon sources [Nano Letters 16, 270 (2016)], tailored emission from two-dimensional semiconductor materials [Nano Letters 15, 3578 (2015), ACS Photonics 5, 552 (2018)], perfect absorbers and combinatorial plasmonic colors [Advanced Materials 27, 7897 (2015), Advanced Materials 29, 1602971 (2017)]. [Preview Abstract] |
Tuesday, May 29, 2018 9:00AM - 9:30AM |
B01.00003: Will Allis Prize for the Study of Ionized Gases talk: Solving the Boltzmann equation for electrons in weakly ionized gases Invited Speaker: Leanne Pitchford Technologies based on low-temperature plasmas (LTPs) are ubiquitous in today's society, and modeling has played an essential role in their development and optimization. LTPs are generated most simply by applying a voltage across two electrodes separated by a gas gap. Because of their light mass, the electrons are rapidly accelerated and energy is transferred to the gas in collisions. The electron ``effective temperature'' is much higher than that of the ions or the neutrals, and the electron energy distribution function (eedf) is often non-Maxwellian. Data needed for fluid models of LPTs include transport and rate coefficients which are various energy moments of the eedf. The eedf itself is determined by solving the Boltzmann equation using a complete set of electron-neutral scattering cross sections as input, the availability and quality of which are factors determining the accuracy of the solution. Additional determining factors are the assumptions used in solving the Boltzmann equation, an integro-differential equation in space, velocity, and time. A classic assumption is the ``2-term'' approximation - a 2-term Legendre expansion of the angular dependence of the velocity with respect to the applied electric field, as detailed by WP Allis in 1956 in Handbuch des Physik. This talk will briefly review the 2-term and other approximations before concluding with a description of the LXCat project, a community-wide project aimed at making quality data for modeling LTPs available on-line. [Preview Abstract] |
Tuesday, May 29, 2018 9:30AM - 10:10AM |
B01.00004: 2018 Norman F. Ramsey Prize in Atomic, Molecular and Optical Physics, and in Precision Tests of Fundamental Laws and Symmetries Recipient talk: Atomic Quantum Simulation 2.0 Invited Speaker: Peter Zoller Atomic physics provides us with the realization of engineered quantum many-body lattice models as quantum simulators. This includes Hubbard models for bosonic and fermionic cold atoms in optical lattices, and spin models with Rydberg atoms and chains of trapped ions. Among the noticeable recent experimental advances are complete quantum control, and single shot measurements in lattice systems of atoms and ions achieving single site resolution, as illustrated by the quantum gas microscope. In this talk we focus from a theory perspective on new opportunities provided by these experimental advances, which blur the the traditional line between 'quantum computing' and 'quantum simulation'. Topics of interest are measurement protocols for Renyi entropies applicable across all atomic platforms, which quantifies entanglement through 'random measurements' on single copies of a quantum system. Furthermore, these developments open the door to implementing Quantum Approximate Optimization Algorithms (QAOA) on various atomic platforms, as a quantum simulator interacting with a classical computer in a feedback loop. We illustrate this approach with finding approximate ground states for high energy models of lattice gauge theories with trapped ions and Rydberg arrays. We conclude with remarks on applying QAOA to quantum metrology, including Ramsey spectroscopy. [Preview Abstract] |
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