We propose a method to realize tunable quantum spin models with
Dzyaloshinskii-Moriya interaction (DMI) in Rydberg atom quantum simulators. Our
scheme uses a two-photon Raman transition and transformation to the
spin-rotating frame. We investigate the quantum dynamics of the model including
only the DMI and Zeeman energy, which can be experimentally realized in our
scheme. Unlike its classical counterpart, the magnetization curve in this model
is continuous under the open boundary condition. We also show that the model
accommodates quantum many-body scars exhibiting nonergodic dynamics.Comment: 7 pages and 4 figures (main) and 13 pages, 8 figures, and 1 table
(supple