Ground-state chiral excitation via periodic modulation

Abstract

In this study we engineer the $z$ component of the Dzyaloshinskii-Moriya interaction mediated by photons to emulate ground-state chiral excitation based on three-level atoms driven by quantum and classical fields. We employ adiabatic elimination techniques to derive an effective Dzyaloshinskii-Moriya interaction Hamiltonian of two-level systems in the ground-state manifold, which can ensure the desired dynamics is achieved through the implementation of periodic modulation. Meanwhile, three-state and multistate chiral excitation can be obtained by choosing appropriate driving frequencies and phases. The numerical simulation results clearly indicate that our proposal can generate the comparatively perfect three-state chiral excitation and relatively reliable multistate chiral excitation. Moreover, the influence of unfavorable factors on the chiral current is discussed in detail, and the potential experimental feasibility further shows that our results provide possibilities for quantum state transfer and future quantum networks.