Derivative-Free Guidance in Continuous and Discrete Diffusion Models with Soft Value-based Decoding - Li, Xiner; Zhao, Yulai; Wang, Chenyu; Scalia, Gabriele; Eraslan, Gokcen; Nair, Surag; Biancalani, Tommaso; Ji, Shuiwang; Regev, Aviv; Levine, Sergey; Uehara, Masatoshi (Advances in Neural Information Processing Systems, 2025)