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 X02: Synthetic Topological Quantum MatterInvited Live Streamed
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Chair: Qi Zhou, Purdue University Room: Ballroom 111 A |
Friday, June 9, 2023 8:00AM - 8:30AM |
X02.00001: Strongly-correlated topological matter with quantum gases Invited Speaker: Nathan Goldman I will present recent progress on realizing and detecting topological phases with cold atoms, setting the focus on fractional quantum Hall states and chiral spin liquids. |
Friday, June 9, 2023 8:30AM - 9:00AM |
X02.00002: Simulating Lattice Gauge Theories with Ultracold Atoms Invited Speaker: Zhen-Sheng Yuan Gauge theories implement fundamental laws of physics by local symmetry constraints. For example, quantum electrodynamics and quantum chromodynamics are both based on gauge theories. However, the equations of gauge theories are usually hard to solve, forming exceptional challenges to supercomputer based numerical procedures. |
Friday, June 9, 2023 9:00AM - 9:30AM |
X02.00003: Strongly interacting fermionic atoms in a synthetic flux ladder Invited Speaker: Ana Maria Rey Understanding the behavior of strongly interacting electrons in solids under strong magnetic fields has been a paradigmatic goal of physics research. Ultracold alkaline-earth atoms (AEAs) loaded in optical lattices featuring a clean, isolated and controllable environment are emerging as powerful quantum simulators which can shed light into this challenging problem. A unique appeal of AEAs fermionic atoms featuring n internal levels is their unique Su(n) symmetric collisions. Here I will discuss our studies on dynamical behaviors of SU(n) interacting fermionic AEAs subject to an effective magnetic field. This system can be engineered by coupling the n internal levels of the atoms, which can be visualized as a synthetic spatial dimension, by appropriate laser drives. I will focus on the dense and strongly interacting regime where our studies reveal rich and interesting behaviors generated by the interplay between strong SU(n) interactions, the external magnetic flux and particle motion all observable at conditions currently accessible in state-of-the art experiments. |
Friday, June 9, 2023 9:30AM - 10:00AM |
X02.00004: Quantum Hall physics in a quantum Foucault pendulum Invited Speaker: Richard J Fletcher When charged particles are placed in a magnetic field, the single-particle energy states form discrete, highly-degenerate Landau levels. Since all states within a Landau level have the same energy, the behaviour of the system is completely determined by the interparticle interactions and strongly-correlated behaviour such as the fractional quantum Hall effect occurs. Here, we present recent experiments from MIT on the microscopy of a rapidly-rotating Bose-Einstein condensate, in which the Coriolis force felt by a massive particle in a rotating frame plays the role of the Lorentz force felt by a charged particle in a magnetic field. In a magnetic field the X and Y coordinates of a particle do not commute, leading to a Heisenberg uncertainty relation between spatial coordinates. We exploit the ability to squeeze non-commuting variables to dynamically create a Bose-Einstein condensate occupying a single Landau gauge wavefunction, and investigate its purely interaction-driven dynamics in the lowest Landau level. We reveal a spontaneous crystallization of the fluid, driven by the interplay of interactions and the magnetic field; increasing the cloud density smoothly connects this quantum behavior to a classical Kelvin-Helmholtz-type hydrodynamic instability, driven by the sheared superfluid flow profile arising from the vector potential. Finally, we project a sharp optical boundary onto our system and demonstrate controllable injection of its associated chiral edge states, quantifying their speed, excitation energy, and dependence upon wall structure. |
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