Proposal for simulating quantum spin models with the Dzyaloshinskii-Moriya interaction using Rydberg atoms and the construction of asymptotic quantum many-body scar states

TL;DR

This paper presents a method to simulate quantum spin models with Dzyaloshinskii-Moriya interaction using Rydberg atoms, enabling exploration of nonergodic states and scar states not accessible in solid-state systems.

Contribution

The authors introduce a feasible experimental scheme to simulate DMI spin models with Rydberg atoms, including the construction of quantum many-body scar states and analysis of nonergodic dynamics.

Findings

Successful simulation of DMI spin models with Rydberg atoms

Identification of quantum many-body scar states in the model

Demonstration of nonergodic behavior and highly tunable DMI effects

Abstract

We have developed a method to simulate quantum spin models with the Dzyaloshinskii-Moriya interaction (DMI) using Rydberg atom quantum simulators. Our approach involves a two-photon Raman transition and a transformation to the spin-rotating frame, both of which are feasible with current experimental techniques. As a model that can be simulated in our setup but not in solid-state systems, we consider an $S=\frac{1}{2}$ spin chain with a Hamiltonian consisting of the DMI and Zeeman energy. We study the magnetization curve in the ground state of this model and quench dynamics. Further, we show the existence of quantum many-body scar states and asymptotic quantum many-body scar states. The observed nonergodicity in this model demonstrates the importance of the highly tunable DMI that can be realized by the proposed quantum simulator.