![]()
更多精彩视频登陆网站
www.koushare.com
课程直播二维码
此次讲座由中科院大学卡弗里理论科学研究所主办，授权蔻享学术进行网络直播与录播。广大科研工作者可以关注“蔻享学术”公众号，通过“视频”»“学术直播间”栏目免费观看。
主题：Emergent classicality in general multipartite states and channels
主讲人：祁晓亮
单位：Stanford University
In a quantum measurement process, classical information about the measured system spreads throughout the environment. Meanwhile, quantum information about the system becomes inaccessible to local observers. Here we prove a result about quantum channels indicating that an aspect of this phenomenon is completely general. We show that for any evolution of the system and environment, for everywhere in the environment excluding an O(1)-sized region we call the "quantum Markov blanket," any locally accessible information about the system must be approximately classical, i.e. obtainable from some fixed measurement. The result strengthens the earlier result of Brand~ao et al. in which the excluded region was allowed to grow with total environment size. It may also be seen as a new consequence of the principles of nocloning or monogamy of entanglement. Our proof offers a constructive optimization procedure for determining the "quantum Markov blanket" region, as well as the effective measurement induced by the evolution. Alternatively, under channel-state duality, our result characterizes the marginals of multipartite states.
![]()
祁晓亮，16岁考入清华大学基础科学班。2003年本科毕业后，师从清华大学高等研究中心翁征宇教授攻读博士学位，毕业后到美国斯坦福大学物理系张守晟教授处做博士后研究。2009年，任教斯坦福大学物理系。他的主要研究方向为凝聚态物理中的拓扑现象、量子纠缠和全息对偶问题，在量子自旋霍尔效应、拓扑绝缘体及相关领域作出一系列原创性工作。已在Science、Nature Physics、PRL等刊物上发表多篇论文。
为满足更多科研工作者的需求，蔻享平台开通了各科研领域的微信交流群。进群请添加微信18256943123（备注您的科研方向）小编拉您入群哟！蔻享网站www.koushare.com已开通自主上传功能，期待您的分享！
欢迎大家提供各类学术会议或学术报告信息，以便广大科研人员参与交流学习。