Quantum information decoupling is a fundamental primitive in quantum information theory, underlying various applications in quantum physics. In this work, we prove a novel one-shot decoupling theorem formulated in terms of quantum relative entropy distance, with the decoupling error bounded by two sandwiched Renyi conditional entropies. In the asymptotic

i.i.d. setting, this theorem is converted into achievability bound on the error exponent for quantum information decoupling,  that is, the best exponential rate under which perfect decoupling is asymptotically approached. This result  is then applied to quantum state merging and quantum channel simulation, exploiting their inherent connection to decoupling.

报告人简介：姚永胜，亚琛工业大学博士后研究员，研究方向为量子信息理论与量子资源理论，研究成果发表于 IEEE Transactions on Information Theory、Communications in Mathematical Physics 等国际学术期刊。2017年本科毕业于大连理工大学，2024年于哈尔滨工业大学获得博士学位，师从李科教授。曾获2025年钟家庆数学奖2024年、哈尔滨工业大学优秀博士学位论文奖。