讲座题目：Sequential scheme for locally discriminating bipartite unitary operations

讲座人：李绿周

讲座时间：10:30-11:30

讲座日期：2018年3月29日

地点：长安校区 图书馆西附楼小会议室

主办单位：yL23411永利官网登录 计算智能团队

讲座内容：Distinguishability of unitary operations is fundamental in quantum computation and information.For example,the Duetsch-Jozsa algirithm is essentially to distinguish two set of unitary operations (Oracle operators).Local distinguishability of bipartite unitary operations has recently received much attention. A nontrivial and interesting question concerning this subject is whether there is a sequential scheme for locally discriminating between two  bipartite unitary operations, because a sequential scheme usually represents the most economic strategy for discrimination. An affirmative answer to this question was given  in our previous work, however with two limitations: (i) the  unitary operations  to be discriminated were limited to act on $d\otimes d$, i.e., a two-qudit system, and (ii) the inverses of the unitary operations  were assumed to be  accessible, although this assumption may be unrealizable in experiment. Thus, recently we have improved the result by removing the two limitations. Specifically, we show that any two  bipartite unitary operations acting on $d_A\otimes d_B$ can be locally discriminated by a sequential scheme, without using the inverses of the unitary operations. Therefore, this work enhances  the applicability and feasibility of the sequential scheme for locally discriminating unitary operations. In this talk, we will discuss the above results in detail.

讲座人简介：李绿周，中山大学数据科学与计算机学院教授，博士生导师。2009年6月毕业于中山大学计算机系，获博士学位，其后留校任教，2012年到悉尼科技大学进行合作研究。从事量子计算理论研究，过去十余年主要从计算科学的角度出发，围绕“量子计算相对于经典计算有何优势与本质不同”这一中心问题展开研究，目前的主要研究兴趣为量子算法。已在Journal of Computer and System Sciences, Information and Computation, Theoretical Computer Science, IEEE transaction on Fuzzy Systems, Physical Review A 等国际知名学术期刊发表论文近50篇，SCI收录近40篇。曾获得2009年度中国计算机学会优秀博士学位论文奖，2012年度中山大学青年教师授课大赛一等奖。