发表机构
Joint Quantum Institute, Department of Physics, NIST/University of Maryland; Joint Center for Quantum Information and Computer Science, NIST/University of Maryland(量子联合研究所,物理系,美国国家标准与技术研究院/马里兰大学; 量子信息与计算科学联合中心,美国国家标准与技术研究院/马里兰大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文通过有限维构造模仿自由Haar酉行为,给出了最小输出冯·诺依曼熵非可加性的显式非随机例子,并证明同一信道对任意p也违反Rényi熵可加性。
AI 中文摘要
我们给出了最小输出冯·诺依曼熵非可加性的一个显式非随机例子。证明使用了模仿自由Haar酉行为的有限维构造。同一信道也对任意$1\le p\le\infty$的最小输出Rényi-$p$熵给出了可加性的违反。
英文摘要
We give an explicit non-random example of nonadditivity of minimum output von Neumann entropy. The proof uses a finite-dimensional construction which imitates free Haar unitary behavior. The same channel gives a violation of additivity for the minimum output Rényi-$p$ entropy for any $p\in[1,\infty]$. Additionally, given any $p_0>0$ and $\mathfrak g>0$, we extend the construction to obtain an explicit non-random channel which has entropy gap $\ge\mathfrak g$ uniformly over $p\in[p_0,\infty]$.
Comments22 pages; v2 added Theorem 1.3/Appendix B on extension to large entropy gap and p\ge p_0>0