Quantum Charge and Spin-Polarized Pumping in a Chiral Wire with Circular Electric Field

We investigate charge and spin transport in a chiral wire driven by a circularly rotating electric field. At low frequencies, the rotating field opens a band gap, resulting in topological Thouless charge pumping that is quantized and reveal the handedness of the chain, though unpolarized in spin. At above gap frequencies, we observe a transition to circular photogalvanic behavior, suggesting non-zero spin current generation. When an additional flux threads the chain, spin-polarized topological Thouless pumping and a potential spin photogalvanic effect emerge, revealing novel pathways to spin-polarized transport in chiral systems.