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Protecting the entanglement of two-qubit over quantum channels with memory via weak measurement and quantum measurement reversal

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Chinese physics B 2020年第11期29卷 203-211页

作者： Mei-Jiao Wang Yun-Jie Xia Yang Yang liao-Zhen Cao Qin-Wei Zhang Ying-De li Jia-Qiang Zhao Department of physics and Optoelectronic engineering Weifang UniversityWeifang 261061China college of physics and{2. Qufu Normal UniversityQufu 273165China Shandong Provincial Key Laboratory of Laser Polarization and Information Technology Qufu Normal UniversityQufu 273165China

Based on the quantum technique of the weak measurement and quantum measurement reversal(WMR),we propose a scheme to protect entanglement for an entangled two-qubit pure state from four typical quantum noise channels with memory,i.e.,the amplitude damping channel,the phase damping channel,the bit flip channel,and the depolarizing *** a given initial state |Ψ>=a |00>+d|11>,it is found that the WMR operation indeed helps to protect entanglement from the above four quantum channels with memory,and the protection effect of WMR scheme is better when the coefficient a is *** the other initial state |φ>=b|01>+c|10>,the effect of the protection scheme is the same regardless of the coefficient b and the WMR operation can protect entanglement in the amplitude damping channel with ***,the protection of entanglement in quantum noise channels without memory in contrast to the results of the channels with memory is more *** |Ψ> or |φ>,we also find that the memory parameters play a significant role in the suppression of entanglement sudden death and the initial entanglement can be drastically *** more important result is that the relationship between the concurrence,the memory parameter,the weak measurement strength,and quantum measurement reversal strength is found through calculation and *** provides a strong basis for the system to maintain maximum entanglement in the nosie channel.

关键词： quantum entanglement weak measurement and quantum measurement reversal quantum channel with memory concurrence

铝硅酸盐玻璃中基于局域过剩电荷模型的Bi近红外发光调控

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硅酸盐学报 2022年第4期50卷 902-912页

作者：李晓曼郭海曲阜师范大学物理工程学院山东曲阜273165 浙江师范大学物理与电子信息工程学院浙江金华321004

玻璃中铋离子的超宽带近红外(NIR)发光应用前景广泛,但Bi近红外中心的稳定性问题限制了其实际应用。为此,本工作以铋掺杂钇铝硅酸盐玻璃为研究对象,对可有效调控铋近红外发光行为的局域过剩电荷模型进行了补充与拓展,通过调控玻璃网络... 详细信息

玻璃中铋离子的超宽带近红外(NIR)发光应用前景广泛,但Bi近红外中心的稳定性问题限制了其实际应用。为此,本工作以铋掺杂钇铝硅酸盐玻璃为研究对象,对可有效调控铋近红外发光行为的局域过剩电荷模型进行了补充与拓展,通过调控玻璃网络中引入的网络修饰体(Y^(3+))和低于四价的可取代Si^(4+)的网络形成体(Al^(3+)),在铋离子周围建成了局域过剩负电荷场,从而有效调控了铋离子在钇铝硅酸盐玻璃中的近红外发光行为(包括其价态、吸收和发光强度与峰位);同时提出了Bi近红外中心的分布规律:Bi^(0)主要分布在Si-O-Si/Si-O-Al网络结构多元环中,而Bi^(+)主要分布在Si网络框架结构的缝隙沟道内。一方面,解决了钇铝硅酸盐玻璃,甚至其他碱金属、碱土金属(锂/钠/钾、镁/钙/锶/钡等)铝硅酸盐玻璃中铋近红外中心的稳定性问题,为铋激光玻璃的设计和后期光纤制备奠定了实验与理论基础;另一方面,也证实了局域过剩电荷模型的有效性和普适性,为其他多价态发光离子(例如Eu、Ce、Cu、Ag、Sn等)的价态稳定化和网络分布可调化提供了新思路、新方法。

关键词：局域过剩电荷模型铋近红外发光钇铝硅酸盐玻璃

Paired quasi-periodic pulsations of hard X-ray emission in a solar flare

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Science China(physics,Mechanics & Astronomy) 2023年第5期66卷 195-206页

作者： Hai-Sheng Zhao Dong li Shao-lin Xiong Yan-Qiu Zhang Yang Su Wei Chen Yi Zhao Xiao-Bo li Jia-Cong liu Wen-Xi Peng Rui Qiao Xin-Qiao li Xiang-Yang Wen li-Ming Song Shi-Jie Zheng Xin-Ying Song Xiao-Yun Zhao Yue Huang Shuang-Nan Zhang Shuo Xiao Ce Cai Zheng-Hua An Can Chen Gang Chen Wei Chen Yan-Qi Du Min Gao Ke Gong Dong-Ya Guo Zhi-Wei Guo Jian-Jian He Bin li Chao li Chao-Yang li Gang li Jian-Hui li Lu li Qing-Xin li Yan-Guo li Jing liang Xiao-Hua liang Jin-Yuan liao Xiao-Jing liu Ya-Qing liu Qi Luo Xiang Ma Bin Meng Ge Ou Dong-li Shi Jing-Yan Shi Gong-Xing Sun Xi-Lei Sun You-li Tuo Chen-Wei Wang Hui Wang Jin Wang Jin-Zhou Wang Ping Wang Wen-Shuai Wang Hong Wu Sheng-Lun Xie Yan-Bing Xu Yu-Peng Xu Wang-Chen Xue Sheng Yang Min Yao Jian-Ying Ye Qi-Bin Yi Chao-Yue Zhang Da-li Zhang Fan Zhang Fei Zhang Hong-Mei Zhang Kai Zhang Peng Zhang Xiao-Lu Zhang Zhen Zhang Guo-Ying Zhao Shi-Yi Zhao Chao Zheng Xing Zhou Yue Zhu Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China university of Chinese Academy of Sciences Beijing 100049China Department of Astronomy Beijing Normal UniversityBeijing 100875China School of Computing and Artificial Intelligence Southwest Jiaotong UniversityChengdu 611756China physics and Space Science college China West Normal UniversityNanchong 637002China Key Laboratory of Stellar and Interstellar physics and Department of physics Xiangtan UniversityXiangtan 411105China Institute of Astrophysics Central China Normal UniversityWuhan 430079China School of physics Changchun University of Science and TechnologyChangchun 130022China college of physics and{2. Qufu Normal UniversityQufu 273165China college of physics Sciences&Technology Hebei UniversityBaoding 071002China

We investigate high time resolution data obtained by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)during the flare event on 2.2. April 2. at 01:52.*** subpeaks with durations of 4-6 s have been detected in the hard X-ray precursor phase,and the key feature is that they appear in pairs and seem like double-peak *** subpeaks are rarely observed in hard X-ray band and confirmed by the microwave obtained by Nobeyama Radio Polarimeters(NoRP)and Radio Solar Telescope Network(RSTN).While an exponential function can describe the continuum component of the time profile from the precursor to part of the impulsive *** periods of quasi-periodic pulsations(QPPs)are detected to be about 7.3 and 12.8 s for the precursor and impulsive phase,respectively,with at least 95%confidence *** paired QPPs are assumed to be double-peak QPPs and then the scenario of current loop coalescence model is found to be in good agreement with our *** precursor phase can be interpreted as the oscillating coalescence of two islands,while the impulsive phase can be interpreted as more islands to coalesce one by one to form larger islands.

关键词： solar flare QPPs loop coalescence circular-ribbon flare

Remarkable surface-enhanced Raman scattering of highly crystalline monolayer Ti3C2.nanosheets

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Science China Materials 2020年第5期63卷 794-805页

作者： Yuting Ye Wencai Yi Wei liu Yun Zhou Hua Bai Junfang li Guangcheng Xi Institute of Industrial and Consumer Product Safety Chinese Academy of Inspection and QuarantineBeijing 100176China School of physics and Physical engineering Qufu Normal UniversityQufu 273165China college of Science Chinese Jiliang UniversityHangzhou 310018China

As a powerful non-destructive and label-free detection technology,surface-enhanced Raman scattering(SERS)has been widely used in environmental-pollutant detection,biological-tissue sensing,molecular fingerprint analysis and so *** from the traditional SERS substrates represented by noble metals and semiconductors,herein,we report a new highly sensitive SERS substrate material with high stability,biocompatibility,and low cost,namely nucleusfree two-dimensional electron gas(2.EG)Ti3C2.monolayer *** highly crystalline monolayer Ti3C2.nanosheets with clean surface are synthesized by an improved chemical exfoliation and microwave heating *** unique structure of nucleus-free-2.EG in Ti3C2.monolayer provides an ideal transport channel without nuclear scattering,which makes the highly crystalline monolayer Ti3C2.nanosheets achieve a Raman enhanced factor of 3.82.108 and a 10-11 level detection limit for typical environmental pollutants such as azo dyes,trichlorophenol,and bisphenol *** imaging is also realized on the surface of the Ti3C2.monolayers,which may be the first time that approximate single-molecule imaging has been achieved on a non-noblemetal SERS *** toxicological experiments show that the cytotoxicity of this material is very *** the facile synthesis,high biocompatibility,low cost and high chemical stability of carbide nanosheets,these Ti3C2.monolayer nanosheets show significant promise for the design and fabrication of flexible SERS substrates for the sensing of trace substances with ultrahigh sensitivity.

关键词： Ti3C2 nucleus-free 2. electron gas monolayer nanosheets SERS microwave heating quasi-metals

Polarization in D-shaped fiber modulated by magneto-optical dichroism of magnetic fluid

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Chinese Optics Letters 2020年第1期18卷 7-11页

作者： Rende Ma Luxue Wan Xiuhao liu Xiaoping li Junfeng Jiang Yunjie Xia Shandong Provincial Key Laboratory of Laser Polarization and Information Technology Department of PhysicsSchool of Physics and EngineeringQufu Normal UniversityQufu 273165China college of Chemistry and Chemical engineering Qufu Normal UniversityQufu 273165China college of Precision Instrument&Opto-electronics engineering Tianjin UniversityTianjin 300072China Key Laboratory of Opto-electronics Information and Technical Science Ministry of EducationTianjin UniversityTianjin 300072China

The polarization of a D-shaped fiber is modulated after immersing it in magnetic fluid(MF)and applying a magnetic *** analysis predicts that magneto-optical dichroism of MF plays a key role in light polarization *** light polarization modulation,the evanescent wave polarized parallel to the magnetic field has greater loss than its orthogonal *** polarization of a D-shaped fiber with a wide polished surface can be modulated *** concentration MF and a large magnetic field all have great ability to modulate light polarization.

关键词： fiber optics components polarization-selective devices magneto-optic systems magneto-optical materials

利用特殊函数和类比法有序化排列正负指数幂算符

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物理学报 2021年第4期70卷 80-90页

作者：王磊李洪奇徐兴磊徐世民王继锁菏泽学院物理与电子工程学院菏泽274015 曲阜师范大学物理工程学院曲阜273165

研究算符函数的有序化排列是一项重要的数理任务.本文利用特殊函数和正规乘积排序与反正规乘积排序间的互换法则法导出了幂算符(αα^+)^±n和(α^+α)^±n的正规与反正规乘积排序.进一步,利用类比法得到了算符(XP)^±n和(PX)^±n的坐标... 详细信息

研究算符函数的有序化排列是一项重要的数理任务.本文利用特殊函数和正规乘积排序与反正规乘积排序间的互换法则法导出了幂算符(αα^+)^±n和(α^+α)^±n的正规与反正规乘积排序.进一步,利用类比法得到了算符(XP)^±n和(PX)^±n的坐标-动量排序与动量-坐标排序式.最后,对新得到的这些算符结果的应用进行一些讨论.

关键词：算符的有序排列特殊函数互换法则类比法

An Analysis of Emily in“ A Rose for Emily”from the Perspective of Feminism

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海外英语 2015年第16期 142-143页

作者：孔鲁晓王莉赵建平曲阜师范大学外国语学院 college of Foreign Language of qufu normal university college of physics and{2. of qufu normal university

William Faulkner is a modern American *** is interested in what goes on beneath the surface of a story but not in tragedy *** feminist theory,this paper analyzes Emily’s living experience in his"A Rose for Emily";aim... 详细信息

关键词： William Faulkner " A Rose for Emily " Emily femini

变系数线性微分方程理论在年龄结构种群模型平衡态求解中的应用

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曲阜师范大学学报（自然科学版） 2021年第3期47卷 1-6页

作者：李盈科张真真张瑜李双喜李岩松新疆农业大学数理学院新疆维吾尔自治区乌鲁木齐市830052 西北师范大学计算机科学与工程学院甘肃省兰州市730000

尽管求解变系数的常微分方程组的柯西问题理论已经比较完善,但因柯西问题所刻画的具体问题背景的复杂性而其解法也呈多样性.针对这类问题,该文以一类具有年龄结构的种群动力学模型为例,它的平衡态的求解可转化为求变系数的线性常微分方... 详细信息

尽管求解变系数的常微分方程组的柯西问题理论已经比较完善,但因柯西问题所刻画的具体问题背景的复杂性而其解法也呈多样性.针对这类问题,该文以一类具有年龄结构的种群动力学模型为例,它的平衡态的求解可转化为求变系数的线性常微分方程组的初始值问题.利用两种不同的方法给出所求问题的解,展示了这类问题求解的灵活性.最后给出了一组数值模拟来说明解法的合理性.

关键词：年龄结构模型平衡态迭代

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差动式电感测量金属丝杨氏模量

大学物理实验 2019年第5期32卷 13-15,73页

作者：李振华马昆张泽汇李晓明曲阜师范大学物理工程学院

基于铁芯在差动式电感线圈中移动使线圈的电感值发生变化从而表征微小位移的原理设计了测量金属丝杨氏模量的新型实验装置。通过砝码给金属丝施加一定的力导致金属丝伸长,金属丝在伸长时使固定在它上面的铁芯在线圈中移动,从而使差动线... 详细信息

基于铁芯在差动式电感线圈中移动使线圈的电感值发生变化从而表征微小位移的原理设计了测量金属丝杨氏模量的新型实验装置。通过砝码给金属丝施加一定的力导致金属丝伸长,金属丝在伸长时使固定在它上面的铁芯在线圈中移动,从而使差动线圈1和差动线圈2.电感值发生变化。利用铁芯移动距离与电感变化之间的关系得到金属丝的伸长量,将金属丝的伸长量代入公式计算得到金属丝的杨氏模量。

关键词：杨氏模量差动式电感微小位移测量电感