Bulletin of the American Physical Society
51st Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 65, Number 4
Monday–Friday, June 1–5, 2020; Portland, Oregon
Session D01: Jin Thesis Prize SessionInvited Live
|
Hide Abstracts |
Chair: Susanne Yelin, Harvard University Room: Portland 253-254 |
Tuesday, June 2, 2020 2:00PM - 2:30PM Live |
D01.00001: FINALIST: Atom interferometry in an optical cavity Invited Speaker: Matthew Jaffe Matter wave interferometry has become a powerful technique for precision measurement, despite limitations stemming from the precision and uniformity of atom-laser interactions. Optical resonators offer a route to precise control of the spatial structure of a laser beam. Combining these two concepts, we have built the first atom interferometer inside of an optical cavity. In this talk, I will present a series of measurements and experimental techniques enabled by this new tool. The pristine intra-cavity optical wavefronts allow for unprecedented matter wave manipulations, including trapped interferometers of up to 20 seconds duration. The cavity interferometer has enabled us to study interactions between cesium atoms and an in-vacuum source mass. We measured the atoms' gravitational attraction to the source mass, making it the smallest source body ever probed gravitationally with an atom interferometer. Searching for additional forces due to screened fields, we tightened constraints on certain dark energy models by several orders of magnitude. Finally, we measured a novel force mediated by blackbody radiation for the first time. These results demonstrate the feasibility and utility of bringing a cavity to atom interferometry. Exploiting advantages of the cavity promises more capabilities and exciting science, such as a measurement of the gravitational Aharonov-Bohm effect. [Preview Abstract] |
Tuesday, June 2, 2020 2:30PM - 3:00PM Live |
D01.00002: FINALIST: Dynamics of Strongly Interacting Quantum Many-Body Systems in Diamond Invited Speaker: Soonwon Choi Recent advances in our ability to coherently manipulate many-body, quantum systems have enabled the exploration of dynamical phenomena in previously inaccessible regimes. In this talk, I will describe a number of investigations based on high-density ensembles of nitrogen-vacancy (NV) color centers in diamond. In our sample, the NVs are sufficiently dense such that dipolar interactions between their electronic spins dominate the system's dynamics. This naturally leads to the realization of a strongly interacting, disordered spin ensemble, which we utilize to explore a variety of exotic non-equilibrium quantum phenomena. In particular, I will describe our studies of both critically slow spin dynamics and our observation of discrete time crystalline order. Finally, I will present a new framework for controlling the dynamics of a generic spin ensemble using only global control fields; this framework allows one to quickly identify when a given many-body system can be used as a versatile analog simulator. [Preview Abstract] |
Tuesday, June 2, 2020 3:00PM - 3:30PM Live |
D01.00003: FINALIST: Quantum Hall Physics with Photons Invited Speaker: Nathan Schine Can quantum materials be made of light? This exciting possibility requires two primary ingredients, photons that behave like massive particles and strong interactions between those photons. We describe our realization of these ingredients and our initial explorations of the resulting system. First, we develop a synthetic magnetic field for harmonically trapped photons and observe the formation of a Landau level. This enables investigation into three distinct topological characteristics of a photonic integer quantum Hall system. Next, we turn photons into strongly-interacting cavity Rydberg polaritons, quasiparticles which inherit their motional dynamics from the optical cavity and gain strong interactions from Rydberg excitations of a cold Rubidium gas. Granting these polaritons access to a degenerate Landau level of cavity states allows them to move, collide, and order themselves into topologically nontrivial material states. Observations of strong correlations in both real space and angular momentum space certify the creation and detection of a photonic Laughlin state, a ground state of a fractional quantum Hall system. Developing synthetic quantum materials out of light provides fundamentally new experimental capabilities and opportunities and here establishes quantum many-body optics as a direct route towards breakthroughs in understanding topological order and strongly correlated materials. [Preview Abstract] |
Tuesday, June 2, 2020 3:30PM - 4:00PM Live |
D01.00004: Deborah Jin Award for Outstanding Doctoral Thesis Research in Atomic, Molecular, or Optical Physics Recipient: Quantum Simulation of the Hubbard Model Invited Speaker: Christie Chiu "Take an ensemble of spin-1/2 fermions and place them in the lowest band of a square lattice. Allow them to tunnel between neighboring sites and interact if they sit on the same site." The Hubbard model is so simple that it can be defined in an abstract, yet it contains incredibly rich quantum many-body physics intricately tied to high-temperature superconductivity, one of the biggest puzzles in condensed matter. In this talk, I will discuss recent work developing quantum gas microscopy of fermionic atoms in an optical lattice for quantum simulation of the Hubbard model. The starting point is a two-dimensional antiferromagnet of approximately 80 sites; from here, we pursue two directions. First, we examine a new quantum state engineering technique to prepare states of lower temperature through dynamic control over the parameters of the Hubbard Hamiltonian. Second, we investigate the interplay between hole motion and spin order through doping the antiferromagnet, and explore the potential for new pattern-based microscopic observables in evaluating candidate microscopic theories. Our findings reveal numerous areas for exploration, including the development of more advanced quantum state engineering protocols and characterizing the dynamics of a hole placed in an antiferromagnet. [Preview Abstract] |
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