SemCoT: Accelerating Chain-of-Thought Reasoning through Semantically-Aligned Implicit Tokens - He, Yinhan; Zheng, Wendy; Zhu, Yaochen; Zheng, Zaiyi; Su, Lin; Vasudevan, Sriram; Guo, Qi; Hong, Liangjie; Li, Jundong (Advances in Neural Information Processing Systems, 2025)