含Dzyaloshinski-Moriya相互作用的三量子位HeisenbergXX链的热纠缠
作者:
谢利军;张登玉;唐世清;詹孝贵;陈银花;...
期刊:
量子光学学报 ,2010年16(2):93-100 ISSN:1007-6654
作者机构:
衡阳师范学院物理与电子信息科学系,湖南,衡阳,421008;湘潭大学材料与光电物理学院,湖南,湘潭,421001;[詹孝贵; 陈银花; 高峰; 张登玉; 游开明] 衡阳师范学院物理与电子信息科学系, 湖南 衡阳 ;[唐世清; 谢利军] 衡阳师范学院物理与电子信息科学系, 湖南 衡阳 <&wdkj&> 湘潭大学材料与光电物理学院, 湖南 湘潭
关键词:
热纠缠;量子隐形传态;保真度;磁场;Dzyaloshinski-Moriya相互作用
摘要:
研究了外加磁场下具有Dzyaloshinski-Moriya (DM)各向异性反对称相互作用的三量子位Heisenberg XX链的对热纠缠以及在热平衡下用该链作为信道来传输未知的量子态. 详细地给出了磁场、DM相互作用及温度对热纠缠和平均传输保真度的影响. 结果表明:磁场和DM相互作用可以有效地调控对热纠缠;在温度较低情况下,关闭磁场和DM相互作用,顺铁磁链可以很好地用来做隐形传态的信道;纠缠不能完全反映平均传输保真度,相同的纠缠可以导致不同的平均传输保真度
语种:
中文
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优化算法在宽带匹配网络中的应用
作者:
杨利容;高峰;周芸
期刊:
衡阳师范学院学报 ,2010年31(03):36-39 ISSN:1673-0313
作者机构:
衡阳师范学院,物理与电子信息科学系,湖南,衡阳,421008;辽宁师范大学,物理与电子技术学院,辽宁,大连,116029;[高峰; 杨利容] 衡阳师范学院;[周芸] 辽宁师范大学
关键词:
优化;宽带匹配网络;共轭梯度法
摘要:
利用优化算法研究了宽带匹配网络,从设计过程可以看出,设计原理简单,使用方便,调试更灵活。其不仅能为所有的网络匹配问题(如天线的匹配、幅度均衡器等)的研究提供理论借鉴,而且能对宽带匹配网络的应用提供实践指导。
语种:
中文
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Controlled Telecloning and Teleflipping for One-Qubit Pure States
作者:
Zhan Xiao-Gui* ;Zhang Deng-Yu;Gao Feng;Li Yan-Ling;Zeng Hao-Sheng
期刊:
理论物理 ,2009年51(6):1023-1026 ISSN:0253-6102
通讯作者:
Zhan Xiao-Gui
作者机构:
[Zhang Deng-Yu; Gao Feng; Zhan Xiao-Gui] Hengyang Normal Univ, Dept Phys, Hengyang 421008, Peoples R China.;[Zeng Hao-Sheng; Li Yan-Ling] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China.
通讯机构:
[Zhan Xiao-Gui] H;Hengyang Normal Univ, Dept Phys, Hengyang 421008, Peoples R China.
关键词:
controlled telecloning;controlled teleflipping;agent
摘要:
We propose a scheme for realizing controlled 1 2 telecloning and 1 1 teleflipping for one-qubit pure states via a quantum network including N agents. The quantum operations used in the information-transmission process are just only one Bell-state measurement, and a series of single-qubit operation. It is shown that the fidelities of the controlled telecloning and teleflipping are independent of the initial states and reach their optimal values of 5/6 and 2/3 respectively on the condition that all the agents collaborate. If any one agent does not cooperate, the fidelities become state-dependent and are always smaller than the corresponding optimal values. The average fidelities are equal to the balanced value 1/2, which implies that on average the state incepted by any one of the receivers is a fully mixed state. Thus no information leaks out to any dishonest receivers. The security of telecloning and teleflipping have been increased greatly. © 2009 Chinese Physical Society and IOP Publishing Ltd.
语种:
英文
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二能级原子与双模腔场拉曼相互作用下的量子相干性
作者:
高峰;肖德涛;张登玉;周熠
期刊:
激光杂志 ,2009年30(4):25-27 ISSN:0253-2743
作者机构:
[高峰] 衡阳师范学院物理与电子信息科学系,湖南,衡阳,421008;[高峰] 南华大学核科学技术学院,湖南,衡阳,421001;[肖德涛] 南华大学;[张登玉; 周熠] 衡阳师范学院
关键词:
二能级原子;双模腔场;拉曼相互作用;密度矩阵;退相干
摘要:
针对二能级原子与双模腔场拉曼相互作用模型,求解了二能级原子体系密度矩阵微分方程,进而研究分析了系统的退相干特性.结果表明:二能级原子的量子相干性与其初始状态、双模腔场的频率、腔内的平均光子数等因素有关,当平均光子数远远大于1时,退相干现象特别明显.
语种:
中文
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低频电磁辐射与脑神经细胞微管的相互作用
作者:
高峰;肖德涛;张登玉;周熠
期刊:
原子核物理评论 ,2009年26(4):343-347 ISSN:1007-4627
作者机构:
[高峰; 周熠] 南华大学核科学技术学院,湖南衡阳,421001;[高峰; 周熠] 衡阳师范学院物理与电子信息科学系,湖南衡阳,421008;[肖德涛] 南华大学;[张登玉] 衡阳师范学院
会议名称:
第十届全国固体核径迹学术会议
会议时间:
2009-08-01
会议地点:
中国陕西西安
关键词:
电磁辐射;神经细胞;非热效应;信息位
摘要:
研究了低频电磁辐射场与脑神经系统的相互作用规律及其机理.电磁辐射为非电离低频电磁场,将脑神经细胞骨架微管(MT)中的两态物理系统进行量子化,用密度矩阵描述脑神经系统中信息位的状态,建立并求解脑神经系统中信息位的动力学方程.结果表明:当非电离低频电磁辐射射向大脑时,脑神经系统中信息位的密度矩阵非对角元在任意时刻都不为零,能够保持较好的量子相干性,脑神经系统的功能不会受到破坏.
语种:
中文
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Realization of Three-Qubit Controlled-Phase Gate Operation with Atoms in Cavity QED System
作者:
Tang Shi-Qing* ;Zhang Deng-Yu;Xie Li-Jun;Zhan Xiao-Gui;Gao Feng
期刊:
中国物理快报:英文版 ,2009年26(2):43-45 ISSN:0256-307X
通讯作者:
Tang Shi-Qing
作者机构:
[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhan Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Henyang 421008, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
通讯机构:
[Tang Shi-Qing] H;Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Henyang 421008, Peoples R China.
关键词:
No English Keywords
摘要:
We propose a scheme for realization of three-qubit controlled-phase gate via passing two three-level atoms through a high-Q optical cavity in a cavity QED system. In the presented protocol, the two stable ground states of the atoms act as the two controlling qubits and the zero- and one-photon Fock states of the cavity-field form the target qubit, and no auxiliary state or any measurement is required. The numerical simulation shows that the gate fidelities remain at a high level under the influence of the atomic spontaneous emission, the decay of the cavity mode and deviation of the coupling strength. The experimental feasibility of our proposal is also discussed.
语种:
英文
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Tripartite States Bell-Nonlocality Sudden Death under Stochastic Dephasing
作者:
Zhang Deng-Yu* ;Xie Li-Jun;Tang Shi-Qing;Zhan Xiao-Gui;Gao Feng
期刊:
中国物理快报:英文版 ,2009年26(8):080301- ISSN:0256-307X
通讯作者:
Zhang Deng-Yu
作者机构:
[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhan Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
通讯机构:
[Zhang Deng-Yu] H;Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词:
No English Keyword
摘要:
We demonstrate that the multipartite Bell-inequality violations can be fully destroyed in a unite time in three-qubit systems under decoherence induced by stochastic dephasing. It is significant that the study of tripartite systems can show fundamental characteristics which do not exist in bipartite systems. © 2009 Chinese Physical Society and IOP Publishing Ltd.
语种:
英文
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热辐射场中两个耦合的二能级原子量子态的纠缠
作者:
张登玉;谢利军;唐世清;詹孝贵;高峰
期刊:
量子光学学报 ,2009年15(3):244-247 ISSN:1007-6654
作者机构:
衡阳师范学院物理与电子信息科学系,湖南,衡阳,421008;湘潭大学材料与光电物理学院,湖南,湘潭,411105;[高峰; 唐世清; 谢利军; 张登玉; 詹孝贵] 衡阳师范学院
关键词:
纠缠;热辐射场;两能级原子;共生纠缠度
摘要:
两个偶极耦合的二能级原子置于热辐射场中,原子用泡利算符描述,环境用无穷的谐振子热库描述,运用密度矩阵方法,得到两能级原子密度矩阵元演化规律。针对三种不同的初始状态,利用共生纠缠度分析置于热辐射场中原子量子态的纠缠。结果表明:当两个原子初始处于不同量子叠加态时,原子的纠缠呈现出明显的差异。
语种:
中文
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四能级原子与双模腔QED作用实现Fredkin门功能(英文)
作者:
张登玉;唐世清;谢利军;詹孝贵;陈银花;...
期刊:
衡阳师范学院学报 ,2009年30(06):25-27 ISSN:1673-0313
作者机构:
衡阳师范学院物理与电子信息科学系,湖南,衡阳,421008
关键词:
量子计算;Fredkin门;腔QED
摘要:
通过四能级原子与双模腔QED系统的谐振作用,提出实现三量子位Fredkin门功能的方案,其中原子量子态作为控制位,两个腔模量子态作为目标位.对方案的实验可行性进行讨论.
语种:
英文
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在双模腔QED系统中用原子-腔共振相互作用实现三量子比特Toffoli门
作者:
唐世清;张登玉;高峰;谢利军;詹孝贵
期刊:
量子电子学报 ,2009年26(5):548-554 ISSN:1007-5461
作者机构:
[唐世清; 张登玉; 高峰; 谢利军; 詹孝贵] 衡阳师范学院物理与电子信息科学系;湘潭大学材料与光电物理学院
关键词:
量子信息;三量子比特Toffoli门;腔QED;保真度
摘要:
提出了一种在腔QED系统中用一个五能级原子通过原子-腔共振相互作用实现三量子比特Toffoli 门的方案.在该方案中,两个量子化的腔模充当控制比特,而原子的两个低能态构成目标比特.数值结果表明,当同时考虑原子高能态的自发辐射和腔模的衰减对量子门保真度的影响时,腔场的衰减是主要的噪声来源.讨论了原子一光场耦合常数的偏差对三量子比特Toffoli门保真度的影响以及方案在实验上的可行性.
语种:
中文
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Remote Information Concentration via a Four-Particle Cluster State
作者:
Chen Yin-Hua* ;Zhang Deng-Yu;Gao Feng;Zhan Xiao-Gui
期刊:
中国物理快报:英文版 ,2009年26(9):21-24 ISSN:0256-307X
通讯作者:
Chen Yin-Hua
作者机构:
[Zhang Deng-Yu; Chen Yin-Hua; Gao Feng; Zhan Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
通讯机构:
[Chen Yin-Hua] H;Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词:
No English Keyword
摘要:
We propose a protocol of remote information concentration achieved by a four-particle cluster state. To achieve the task, Bell state measurement and unitary operation are needed. The result shows a peculiar phenomenon that the remote information concentration is not always successful but with certain probability. © 2009 Chinese Physical Society and IOP Publishing Ltd.
语种:
英文
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Realization of Toffoli gate operation using four-level atoms in cavity QED system
作者:
Tang Shi-Qing* ;Zhang Deng-Yu;Xie Li-Jun;Zhan Xiao-Gui;Gao Feng
期刊:
中国物理B ,2009年18(1):56-61 ISSN:1674-1056
通讯作者:
Tang Shi-Qing
作者机构:
[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhan Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
通讯机构:
[Tang Shi-Qing] X;Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
关键词:
Toffoli gate;four-level atom;cavity QED;fidelity
摘要:
This paper proposes a scheme for realization of a three-qubit Toffoli gate operation using three four-level atoms by a selective atom-field interaction in a cavity quantum electrodynamics system. In the proposed protocol, the quantum information is encoded on the stable ground states of atoms, and atomic spontaneous emission is negligible as the large atom-cavity detuning effectively suppresses the spontaneous decay of the atoms. The influence of the dissipation on fidelity and success probability of the three-qubit Toffoli gate is also discussed. The scheme can also be applied to realize an N-qubit Toffoli gate and the interaction time required does not rise with increasing the number of qubits. © 2009 Chin. Phys. Soc. and IOP Publishing Ltd.
语种:
英文
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Thermal entanglement and teleportation in a three-qubit Heisenberg XXZ model with Dzyaloshinski-Moriya anisotropic antisymmetric interaction
作者:
Xie Li-Jun* ;Zhang Deng-Yu;Tang Shi-Qing;Zhan Xiao-Gui;Gao Feng
期刊:
中国物理B ,2009年18(8):3203-3207 ISSN:1674-1056
通讯作者:
Xie Li-Jun
作者机构:
[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhan Xiao-Gui] Henyang Normal Univ, Dept Phys & Elect Informat Sci, Henyang 421008, Peoples R China.
通讯机构:
[Xie Li-Jun] X;Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
关键词:
quantum teleportation;concurrence;fidelity;Bell inequality violation
摘要:
This paper investigates the thermal pairwise entanglement of a three-qubit Heisenberg XXZ chain in the presence of the Dzyaloshinski-Moriya (DM) anisotropic antisymmetric interaction and quantum teleportation when using the Heisenberg chain as a channel. The entanglement dependences on the DM interaction and temperature are given in detail. It obtains the relation between the concurrence and average fidelity, and shows that the same concurrence can lead different average fidelities. Moreover, it finds the thermally entangled states which do not violate the Bell inequalities, and can still be used for quantum teleportation. © 2009 Chin. Phys. Soc. and IOP Publishing Ltd.
语种:
英文
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深入研究基础教育现状在改革中加强物理学专业建设
作者:
高峰;游开明;张登玉
期刊:
衡阳师范学院学报 ,2009年30(03):149-152 ISSN:1673-0313
作者机构:
衡阳师范学院,物理与电子信息科学系,湖南,衡阳,421008;[高峰; 游开明; 张登玉] 衡阳师范学院
关键词:
物理学;教师教育;课程体系改革
摘要:
我国现行的物理教师教育课程存在着基础课程相对薄弱、教育类课程比例偏低、实践课程明显不足、学科课程有待精化等问题.为了调整和优化我国物理教师教育课程,着力汲取并借鉴国内外认知科学、教育科学和教育技术研究的新思想、新方法与新成果,本文根据我国的具体情况,分析了物理教师教育存在的主要问题,提出了物理教师教育课程体系改革的初步设想.
语种:
中文
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高等师范院校物理学专业课程体系改革研究
作者:
高峰
期刊:
高等理科教育 ,2009年(6):16-19 ISSN:1000-4076
作者机构:
衡阳师范学院,物理与电子信息科学系,湖南,衡阳,421008;[高峰] 衡阳师范学院
关键词:
师范;物理学;课程体系;改革
摘要:
文章根据我国基础教育第八次课程改革的主要精神,分析了物理教师教育存在的主要问题,并论述了我们多年来在物理学专业课程体系方面的改革研究和实践体会及设想。
语种:
中文
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Selective Atom-Cavity Interaction Scheme for Quantum Controlled-NOT Gate Using Four-Level Atoms in Cavity QED System
作者:
Tang Shi-Qing* ;Zhang Deng-Yu;Xie Li-Jun;Zhan Xiao-Gui;Gao Feng
期刊:
理论物理 ,2009年51(2):247-251 ISSN:0253-6102
通讯作者:
Tang Shi-Qing
作者机构:
[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhan Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
通讯机构:
[Tang Shi-Qing] X;Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
关键词:
Cavity QED;Controlled-NOT gate;Fidelity;Four-level atom
摘要:
We propose a scheme for realization a quantum Controlled-NOT gate operation using two four-level atoms through a selective atom-cavity interaction in cavity quantum electrodynamics system. In our protocol, the quantum information is encoded on the stable ground states of the two atoms. During the interaction between atoms and single-mode vacuum cavity-field, the atomic spontaneous emission is negligible as the large atom-cavity detuning effectively suppresses the spontaneous decay of the atoms. The influences of the dissipation and the deviation of interaction time on fidelity and corresponding success probability of the quantum Controlled-NOT gate and the experimental feasibility of our proposal are also discussed. © 2009 Chinese Physical Society and IOP Publishing Ltd.
语种:
英文
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Effects of Anisotropy on Entanglement in a Two-Qubit Heisenberg XYZ Chain with Intrinsic Decoherence
作者:
Xie Li-Jun* ;Zhang Deng-Yu;Tang Shi-Qing;Zhang Xiao-Gui;Gao Feng
期刊:
理论物理 ,2009年51(4):659-663 ISSN:0253-6102
通讯作者:
Xie Li-Jun
作者机构:
[Tang Shi-Qing; Xie Li-Jun; Zhang Deng-Yu; Gao Feng; Zhang Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.;[Tang Shi-Qing; Xie Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
通讯机构:
[Xie Li-Jun] H;Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词:
anisotropy;concurrence;intrinsic decoherence;Heisenberg chain
摘要:
Taking the intrinsic decoherence effect into account, the entanglement of a two-qubit anisotropic Heisenberg XYZ chain in the presence of the Dzyaloshinski-Moriya (DM) anisotropic antisymetric interaction is investigated in this paper. Concurrence, the measurement of entanglement, is calculated. Compared with the anisotropic in XY plane, the DM interaction is another kind of anisotropic antisymmetric exchange interaction. It is shown that the intrinsic decoherence obviously suppresses the time evolution of the entanglement. The DM interaction only acts on the time evolution of the entanglement when the initial state is |ψ(0) cosα|01 + α|10 and weakens the degree of entanglement. The anisotropic in XY plane merely impacts on the time evolution of the entanglement when the system is initially in a state |ψ(0) cosα|00 +α|11. The sufficiently weak anisotropic in XY plane can effectively enhance the degree of entanglement. © 2009 Chinese Physical Society and IOP Publishing Ltd.
语种:
英文
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用Smolin态实现未知量子态的多体受控隐形传态(英文)
作者:
陈银花;张登玉;高峰;詹孝贵;唐世清;...
期刊:
衡阳师范学院学报 ,2009年30(06):28-33 ISSN:1673-0313
作者机构:
衡阳师范学院 物理与电子信息科学系,湖南,衡阳,421008
关键词:
受控隐形传态;Smolin态;贝尔测量
摘要:
提出了用Smolin态作纠缠通道实现未知单比特量子态的受控隐形传态方案.利用比特的Smolin态作量子纠缠通道,这个方案可以用来实现单比特量子态有个控制者的受控隐形传态.并且这个方案可以直接推广到D维空间量子态的多体受控隐形传态.
语种:
英文
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单模真空场中两个耦合二能级原子纠缠的时间演化特性
作者:
张登玉;谢利军;唐世清;詹孝贵;高峰
期刊:
量子电子学报 ,2009年26(1):65-68 ISSN:1007-5461
作者机构:
[张登玉; 谢利军; 唐世清; 詹孝贵; 高峰] 衡阳师范学院物理与电子信息科学系;湘潭大学材料与光电物理学院
关键词:
量子光学;单模真空场;二能级原子;纠缠;共生纠缠度
摘要:
研究了单模真空场中两个耦合二能级原子纠缠特性.运用密度矩阵方法,得到两能级原子约化密度矩阵.借助于共生纠缠度,研究两个耦合二能级原子纠缠的时间演化规律,讨论原子间偶极作用对原子间纠缠的影响.结果表明:原子间的偶极作用导致纠缠度的减少和时间演化周期的增加.
语种:
中文
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Quantum Logic Gates and Cluster States with Four-level Atoms in Cavity QED
作者:
Zhang, Deng-Yu* ;Tang, Shi-Qing;Xie, Li-Jun;Zhan, Xiao-Gui;You, Kai-Ming;...
期刊:
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS ,2009年48(9):2685-2691 ISSN:0020-7748
通讯作者:
Zhang, Deng-Yu
作者机构:
[Zhang, Deng-Yu; You, Kai-Ming; Gao, Feng; Tang, Shi-Qing; Xie, Li-Jun; Zhan, Xiao-Gui] Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.;[Tang, Shi-Qing; Xie, Li-Jun] Xiangtan Univ, Fac Mat & Photoelect Phys, Xiangtan 411005, Peoples R China.
通讯机构:
[Zhang, Deng-Yu] H;Hengyang Normal Univ, Dept Phys & Elect Informat Sci, Hengyang 421008, Peoples R China.
关键词:
Cavity QED;Quantum logic gates;Cluster states
摘要:
We propose a model to implement the two-qubit quantum logic gates, i.e., the quantum phase gate and the Controlled-NOT gate, and generate the atomic qubits cluster states with a large detuned interaction between four-level atoms and a single-mode cavity field. In the presented protocol, the quantum information is encoded on the stable ground states of the atoms, and the effect of decoherence from atomic spontaneous emission is negligible. In addition, the interaction between atoms and the cavity is large detuned, and the cavity is only virtually excited. Therefore, the scheme is insensitive to the cavity decay. The experimental feasibility of our proposal is also discussed.
语种:
英文
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