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 Q07: Assembled Rydberg Matter |
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Sponsoring Units: DQI Chair: Steve Rolston, University of Maryland Room: Grand D |
Thursday, May 31, 2018 8:00AM - 8:30AM |
Q07.00001: Quantum simulation with alkali and alkaline-earth Rydberg-arrays Invited Speaker: Manuel Endres Recently, cold alkali atoms in optical tweezer arrays have emerged as a versatile platform for quantum simulation. I will review these developments and give an update about ongoing experiments with alkaline-earth atoms: 1) I will introduce atom-by-atom assembly as a fast and simple method to generate defect-free atomic arrays. 2) I will review how such arrays can be used as a quantum simulator for specific types of transverse- & longitudinal-field Ising-models with 1/R^6 interaction. 3) I will outline how we are currently extending this work to Alkaline-Earth atoms using Strontium-88; particularly, I will illustrate how this direction could overcome current coherence limits and enable scalability to larger tweezer arrays. [Preview Abstract] |
Thursday, May 31, 2018 8:30AM - 9:00AM |
Q07.00002: Exploring many-body physics in tunable arrays of single Rydberg atoms Invited Speaker: Thierry Lahaye I will report on experiments in which we generate arrays of up to 70 optical tweezers arranged in arbitrary geometries in 1, 2 and 3 dimensions, each containing a single cold atom, and separated by distances of a few micrometers. This is achieved by active sorting of atoms in larger arrays that are initially loaded stochastically. By exciting the atoms to Rydberg states with principal quantum numbers in the range 50–100, we can induce strong, tunable dipolar interactions between the atoms. This system is an ideal platform for studying the many-body physics of spin Hamiltonians. By using the van der Waals interaction, we implement the quantum Ising model in a transverse field and observe the dynamics of the magnetization and of correlation functions following either a quantum quench, either quasi-adiabatic sweeps. Using the resonant dipole-dipole interaction, we observe and control the propagation of a spin excitation in a spin chain governed by the XY spin Hamiltonian. [Preview Abstract] |
Thursday, May 31, 2018 9:00AM - 9:12AM |
Q07.00003: Detailed balance of thermalization dynamics in a Rydberg quantum simulator Hyosub Kim, YeJe Park, Kyungtae Kim, H.-S. Sim, Jaewook Ahn By utilizing a $^{87}$Rb single-atom array synthesizer using dynamic phase holograms, various size ($N<25$) of defect-free zigzag chain was prepared. The chain was resonantly driven to 67S Rydberg state via two-photon transition. We fixed the interatom distance $d=4.0(2)~\mu$m and changed the zigzag angle $\theta$ from $45^{\circ}$ to $180^{\circ}$ so that strong blockade effect only influences to the (next) nearest neighbor sites. In the experiment, we observed global sudden quench dynamics of classical observables, excitation density and density-density correlation. Those observables show saturation that obeys a master equation experimentally constructed from themselves and imposing the principle of the detailed balance (will be discussed). Our experiment demonstrates the detailed balance in a thermalization dynamics that does not require coupling to baths or postulated randomness. [Preview Abstract] |
Thursday, May 31, 2018 9:12AM - 9:24AM |
Q07.00004: Fractional Quantum Hall Physics with Photons Ningyuan Jia, Nathan Schine, Alexandros Georgakopoulos, Albert Ryou, Claire Baum, Logan W. Clark, Ariel Sommer, Jonathan Simon Understanding and manipulating quantum materials is a long sought goal in both the condensed matter and cold atom communities. Rydberg polaritons have recently emerged as a good candidate for studying quantum many-body states due to their fast dynamics and convenient manipulation. Indeed, synthetic magnetic fields and nontrivial topology for photons have been realized using non-planar resonators. Moreover, Rydberg mediated interactions enable photons to collide with each other on a single quantum level. We have used these interactions to realize a polaritonic quantum dot in a single cavity mode. By manipulating the atomic state to couple with multiple cavity modes simultaneously, we explore the collisions of polaritons between modes. Finally, we discuss our latest work on combining all of these capabilities to prepare and characterize few photon Laughlin states. This work points the way to exploring topological quantum materials comprised of Rydberg polaritons. [Preview Abstract] |
Thursday, May 31, 2018 9:24AM - 9:36AM |
Q07.00005: Photonic Topological Quantum Materials Engineering Nathan Schine, Jia Ningyuan, Alexandros Georgakopoulos, Albert Ryou, Claire Baum, Logan W. Clark, Ariel Sommer, Jonathan Simon Interacting quantum materials with nontrivial topology possess a multitude of fascinating properties and behaviors, many of which have never been observed experimentally. Engineered synthetic material systems with made-to-order properties have established themselves as ideal platforms, not just to study analogue solid state materials, but moreover to explore new manifestations of the interplay between topology and interactions. We describe one such system, wherein a resonator traps photons and introduces a synthetic gauge field, while hybridization with Rydberg atoms introduces strong single photon interactions. This realizes a fractional quantum Hall hamiltonian for bosons, but with the additional ability to place the system in curved space. Additional state manipulation techniques with radio-frequency photons offer control over interaction strength and form, while strong modulated AC Stark shifts provide temporal control over particle dispersion and dynamical evolution. We present and characterize these tools separately and then describe ongoing work combining these capabilities to enable new studies of interacting topological materials. [Preview Abstract] |
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