Related Experiment Video
Updated: Apr 13, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
Published on: August 2, 2019
Quantum simulation. Two-dimensional superexchange-mediated magnetization dynamics in an optical lattice
R C Brown1, R Wyllie1, S B Koller1
1Joint Quantum Institute, National Institute of Standards and Technology (NIST), and University of Maryland, Gaithersburg, MD 20899, USA.
Abstract:
The interplay of magnetic exchange interactions and tunneling underlies many complex quantum phenomena observed in real materials. We study nonequilibrium magnetization dynamics in an extended two-dimensional (2D) system by loading effective spin-1/2 bosons into a spin-dependent optical lattice and use the lattice to separately control the resonance conditions for tunneling and superexchange. After preparing a nonequilibrium antiferromagnetically ordered state, we observe relaxation dynamics governed by two well-separated rates, which scale with the parameters associated with superexchange and tunneling. With tunneling off-resonantly suppressed, we observe superexchange-dominated dynamics over two orders of magnitude in magnetic coupling strength. Our experiment will serve as a benchmark for future theoretical work as the detailed dynamics of this 2D, strongly correlated, and far-from-equilibrium quantum system remain out of reach of current computational techniques.
Related Concept Videos
Atomic Nuclei: Nuclear Relaxation Processes
The de Broglie Wavelength
Atomic Nuclei: Magnetic Resonance
Atomic Nuclei: Nuclear Spin State Overview
Valence Bond Theory
¹H NMR: Interpreting Distorted and Overlapping Signals
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...

