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 X04: Quantum Simulation with Rydberg AtomsInvited Live
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Chair: Tom Killian, Rice University |
Friday, June 4, 2021 8:00AM - 8:30AM Live |
X04.00001: Ultrafast and ultracold quantum simulator with attosecond precision Invited Speaker: Kenji Ohmori Many-body correlations govern a variety of important quantum phenomena including the emergence of superconductivity and magnetism in condensed matter as well as chemical reactions in liquids. Understanding quantum many-body systems is thus one of the central goals of modern sciences and technologies. Here we demonstrate a new pathway towards this goal by generating a strongly correlated ultracold Rydberg gas with a broadband ultrashort laser pulse. We have applied our ultrafast coherent control with attosecond precision [1] to a strongly correlated Rydberg gas in an optical dipole trap, and have successfully observed and controlled its ultrafast many-body electron dynamics [2-4]. This new approach is now applied to an atomic BEC, Mott insulator lattice, and arbitrary array assembled with optical tweezers to develop into a pathbreaking platform for quantum simulation of strongly correlated many-body electron dynamics on the ultrafast timescale [5-7]. |
Friday, June 4, 2021 8:30AM - 9:00AM Live |
X04.00002: Emerging Two-Dimensional Gauge Theories in Rydberg Configurable Arrays Invited Speaker: Alessio Celi Solving strongly coupled gauge theories in two or three spatial dimensions is of fundamental importance in several areas of physics ranging from high-energy physics to condensed matter. On a lattice, gauge invariance and gauge-invariant plaquette interactions involve at least four-body interactions that are challenging to realize. In this talk I will show that Rydberg atoms in configurable arrays realized in current tweezer experiments are the natural platform to realize scalable simulators of the Rokhsar-Kivelson Hamiltonian—a 2D U(1) lattice gauge theory that describes quantum dimer and spin-ice dynamics. Using an electromagnetic duality, the plaquette interactions are implemented as Rabi oscillations subject to Rydberg blockade [1]. Remarkably, I will show that controlling the atom arrangement in the array is sufficient to engineer the required anisotropic interactions and the generalized blockade conditions for spins built of atom pairs. I will describe how to adiabatically prepare the resonating valence bond and crystal phases of the Rokhsar-Kivelson Hamiltonian, and probe them and their quench dynamics by on-site measurements of their quantum correlations. To conclude, I will discuss the prospects and open challenges for simulating lattice gauge theories with Rydberg atoms. |
Friday, June 4, 2021 9:00AM - 9:30AM Live |
X04.00003: Exploring complex systems dynamics with Rydberg atoms Invited Speaker: Shannon Whitlock From financial markets and neuronal activity in the brain to the way forest fires and diseases spread, the dynamics of complex systems are governed by critical events and emergent phenomena that are exceedingly difficult to understand or predict from underlying principles. We recently discovered that a gas of ultracold atoms continuously driven to strongly-interacting Rydberg states by an off-resonant laser field displays all the hallmarks of complex systems dynamics in a highly-controllable experimental system: (i) At early times we observe rapid growth of Rydberg excitations that has a striking correspondence with the spreading of diseases empirically observed in epidemics; (ii) At later times we find that the system evolves toward a self-organised critical (SOC) state, a phenomenon that has been conjectured to explain the abundance of scale-invariant systems found in nature. I will discuss how these experiments can be understood in terms of an emergent atomic network that bridges the gap between mathematical models and empirical observations. This provides the opportunity to identify general principles governing non-equilibrium dynamics and to learn how seemingly universal properties emerge from microscopic physical details. |
Friday, June 4, 2021 9:30AM - 10:00AM Live |
X04.00004: Many-body physics with arrays of individual atoms and optical dipoles Invited Speaker: Antoine Browaeys This talk will present our effort to control and use the dipole-dipole interactions between cold atoms in order to implement spin Hamiltonians useful for quantum simulation of condensed matter or quantum optics situations. We trap individual atoms in arrays of optical tweezers separated by a few micrometers. We create almost arbitrary geometries of the atomic arrays in two and three dimensions up to about 200 atoms. To make the atoms interact, we either excite them to Rydberg states or induce optical dipoles with a near-resonance laser. Using this platform, we have in particular explored quantum magnetism, topological synthetic quantum matter, and a new light-matter interface. |
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