Group seminar at MPQ and Zoom: Geometrically frustrated Rb atom arrays in Rydberg states for quantum many-body simulation

Weikun Tian, National University of Singapore
Group seminar at MPQ lecture hall and Zoom
Friday, September 22, 09:00 am (MEZ)

Abstract:

Spin-frustrated lattices are an interesting class of condensed matter systems to study, where exotic quantum phenomena such as the quantum spin liquid phase and spin glasses have been predicted to exist. With the recent development of programmable optical tweezer arrays, neutral atom arrays with long-range Rydberg interactions have become a powerful platform to simulate quantum many-body physics in these systems. In this talk we introduce our quantum simulation platform using defect-free atom arrays with up to 225 Rb atoms rearranged into triangle-based frustrated geometries
[1]. We also report our progress on high-fidelity ground state preparation via optical pumping and Rydberg state excitation through two-photon transitions. The combination of large-scale atom arrays and high-fidelity Rydberg state preparation and detection paves the way for probing quantum many-body physics in large physical systems with frustrated geometries.

[1] W Tian, et al, Phys Rev Applied 19, 034048 (2023).