Author(s): Kang Lan, Xiangji Cai, Zhongxiao Man, Shijie Xie, Ning Hao, Ping Zhang, and Jiyong Fu The generation of exciton valley coherence typically requires linearly polarized (LP) light as an external coherent drive, whereas circularly polarized (CP) light fails to induce coherence. Here, we develop a unified, microscopically grounded open-quantum-system framework within a five-level model i… [Phys. Rev. Lett. 137, 036202] Published Thu Jul 16, 2026