1. 会议地点及报告安排

地    点：黄岛泰成喜来登酒店三楼，凌云 凌月厅

日程安排：

4月22日8:00—8:20 开幕式 主持人：龙桂鲁 教授  8:20-9:20  骆顺龙 教授  9:20-10:20 费少明 教授  10:20-10:40 茶点 主持人：费少明 教授  10:40-11:40 李波 教授 主持人： 骆顺龙 教授  14:00—15:00曹怀信教授  15:00—16:00：张林 教授  16:00—16:20：茶点 主持人：闫凤利 教授  16:20—17:20：胡明亮 教授  17:20- 18:20：张廷桂 教授 4月23日 主持人：曹怀信 教授  8:00-9:00   范桁 教授  9:00-10:00  郭钰 教授  10:00-10:20 茶  点 主持人：高亭 教授 10:20-11:20 陶元红教授

2. 报告题目摘要

1. 范桁，中科院物理所

题目：超导量子计算与量子模拟

摘要：量子计算与量子信息发展迅速，竞争激烈。报告聚焦超导量子计算最新成果，介绍利用超导量子器件实现强关联量子行走，20量子比特多组分薛定谔猫态制备，量子模拟多体局域化和动力学相变，以及量子机器学习实现量子态制备和量子化学应用等，最后将展望量子计算今后几年的发展方向和潜在应用。

2. 费少明，首都师范大学

题目：量子信息处理相关研究介绍

摘要： 我们介绍近期在量子相干性的度量，量子纠缠见证，量子相干性与量子纠缠、真正多体纠缠、量子非局域性及真正多体量子非局域性之间的转换关系，量子信息掩蔽，量子测量，量子张量网络压缩感知及机器学习等相关研究工作。

3.李波，上饶师范学院

题目：Recent Progress in Quantum Information Masking

摘要：We study the problem of information masking through nonzero linear operators that distribute information encoded in single qubits to the correlations between two qubits. It is shown that a nonzero linear operator cannot mask any nonzero measure set of qubit states. We prove that the maximal maskable set of states on the Bloch sphere with respect to any masker is the ones on a spherical circle. Any states on a spherical circle on the Bloch sphere are maskable, which also proves the conjecture on maskable qubit states given by Modi et al. [Phys. Rev. Lett. 120, 230501 (2018)]. we provide explicitly operational unitary maskers for all maskable sets. As applications, different protocols for secret sharing are introduced.

4.骆顺龙，中国科学院数学与系统科学研究院

题目：Noncommutativity versus Nonclassicality

摘要：Nonclassical light states are important for both conceptual and practical reasons: they are basic ingredients in testing and exploring quantum foundations, and are crucial resources in quantum technologies. Various useful criteria have been developed to detect nonclassicality in the literature, and several meaningful measures of nonclassicality have been introduced and measured experimentally. In this talk, exploiting the noncommutativity synthesized by a non-Hermitian generalization of the Wigner-Yanase-Dyson skew information and playing with operator ordering in evaluating average photon number, we develop a novel family of criteria for detecting nonclassicality of light based on Lieb’s concavity, which is a deep and powerful result concerning interaction between quantum states and observables. We elucidate the information-theoretic as well as the physical meaning of the criteria, and illustrate their effectiveness in capturing and quantifying nonclassicality of various important light states.

5.曹怀信，陕西师范大学

题目：Mathematically proving Bell nonlocality motivated by the GHZ argument

摘要： Bell nonlocality of quantum states is an important resource in quantum information and then has various applications. It is usually detected by the violation of some Bell's inequalities and the all-versus-nothing test. In this talk, we aim to establish some mathematical methods for proving Bell nonlocality without inequalities, inspired by the work [Phys. Rev. Lett., 89, 080402 (2002)] regarding the GHZ paradox. For self-containedness, we recall the mathematical definition of Bell nonlocality proposed in [Sci. China-G, 62, 030311 (2019)] and then give some basic properties on it. Then we derive some necessary conditions for a multipartite state to be Bell local and obtain some sufficient conditions for a state to be Bell nonlocal in terms of "expectations" of local observables without invoking Bell inequalities. Unlike the standard approach to nonlocality detection based on violation of Bell inequalities, the obtained  criteria are formulated in terms of certain relations for expectation values of local observables that are constructed from the well-known GHZ paradoxes.

 6.胡明亮，西安邮电大学

题目：导引量子相干及其在量子相变研究中的应用

摘要：量子相干的定量刻画是近年来人们关注的一个热点问题。本报告将首先简要介绍基于资源理论的量子相干量化研究进展，然后引入导引量子相干和量子相干非局域优势的概念，给出两体高维量子态量子相干非局域优势的刻画方案和判定条件，并严格证明当系统维数为素数或素数的整数次幂时，所有具有量子相干非局域优势的态都是量子纠缠态。针对双量子比特态的情形，我们还将讨论量子相干非局域优势与贝尔非定域性的层级关系。最后，我们将介绍基于导引量子相干的量子相变问题研究，并指出与基于量子纠缠和量子失谐等的方法相比，该方法的优势是其有效性并不依赖于所选择的两个自旋的距离，特别是导引量子相干总是有解析解，其实验测量也相对容易。

7.张林，杭州电子科技大学

题目： Probability Density Function of Uncertainty, Uncertainty Regions of Observables and State-Independent Uncertainty Relations

摘要：The optimal state-independent lower bounds for the sum of variances or deviations of observables are of significance for the growing number of experiments that reach the uncertainty limited regime.We present a framework for computing the tight uncertainty relations of variance or deviation via determining the uncertainty regions, which are formed by the tuples of two or more of quantum observables in random quantum states induced from the uniform Haar measure on the purified states. From the analytic formulae of these uncertainty regions, we present state-independent uncertainty inequalities satisfied by the sum of variances or deviations of two, three and arbitrary many observables, from which experimentally friend entanglement detection criteria are derived for bipartite and tripartite systems.

8.郭钰，大同大学

题目：Monogamy of Quantum Discord

摘要： We explore all the trade-off relations of multipartite quantum discord proposed very recently in [Phys. Rev. Lett. 124, 110401 (2020)] and show that the multipartite quantum discord is completely monogamous provided that it does not increase under discard of subsystems. Here, a quantity of multipartite quantity, with the same spirit as established in [Phys. Rev. A. 101, 032301 (2020)], is said to be completely monogamous (i) if it does not increase under loss of subsystems and (ii) if some given combination of subsystems reach the total amount of correlation, then all other combination of subsystems that excluding the given subsystems do not contain such a correlation any more. In addition, we explore all the trade-o_ relations for the global quantum discord proposed in [Phys. Rev. A 84, 042109 (2011)] and show that the global quantum discord is not completely monogamous.

9.张廷桂，海南师范大学

题目：Quantum Nonlocality

摘要：We mainly introduce two works on quantum nonlocality, one is the monogamy relationship in the form of multiplication, and the other is the sharing ability of nonlocality under unilateral measurement.Finally, introduce a little bit of nonlocality in quantum networks.

10.陶元红，浙江科技学院

题目：Quantum Coherence, Mutually Unbiased Bases and Decoherence

摘要：Quantum coherence is an important physical resource which depicts the volatility of physical system. Mutually unbiased bases (MUBs) based on the optimal measurement is an effective tool in quantum information. As for the study of dynamics of quantum system, decoherence is a topic worthy of attention.

   We first study the properties of quantum coherence under mutually unbiased bases. We present the complementary relations and uncertainty relations of five common coherence measures under MUBs, thus giving a new supplement to this theory. As an application of complementary relations, we give a tighter upper bound of the minimum error probability for distinguishing a set of pure states by using the least square measurement. We then derive the trade-off relations between the coherence measures and different mixedness to illustrate decoherence phenomena in the study of dynamics of quantum system.