报告题目：Coherence conversion of Gaussian states

报告时间：2022年3月15日（周二）下午3: 00

腾讯会议 ID: 4375-582-990

报告摘要：The coherence resource theory studies the operational value and efficiency which can be broadly formulated as the question: when can one coherent state be converted into another under incoherent operations. We answer this question completely for one-mode continuous-variable systems by characterizing conversion of coherent Gaussian states under incoherent Gaussian operations in terms of their first and second moments. The no-go theorem of purification of coherent Gaussian states is also built. The structure of incoherent Gaussian operation of two-mode continuous-variable systems is discussed further and is applied to coherent conversion for pure Gaussian states with standard second moments. As concrete applications, we obtain some peculiarities of a Gaussian system: (1) There does not exist a maximal coherent Gaussian state which can generate all coherent Gaussian states; (2) The conversion between pure Gaussian states is reversible; (3) The amount of coherence of input pure state and output pure state are equal.

报告人简介：杜拴平，厦门大学数学科学学院教授。主要从事算子理论、量子信息领域研究，尤其在量子相干资源理论及算子代数上映射结构刻画方面取得了一系列研究成果，在Physical Review A、Quantum Information & Computation、Annals of Physics 等SCI核心期刊发表高水平论文30余篇，其中高被引论文1篇。已结题一项国家自然科学基金面上项目以及多项国自然及省部级科研项目。担任多个SCI期刊（来自于Elsevier、Springer、Taylor and Francis Group、IOP）的审稿人。获2009年山西省自然科学二等奖一项（第三完成人）、2019年福建省自然科学三等奖一项（第一完成人）。

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