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bell violation for the thermal states of an XXZ spin chain with Dzialoshiski-Moriya interaction

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Science China(Physics,Mechanics & Astronomy) 2010年第11期53卷 2074-2079页

作者： MA XiaoSan 1 & WANG AnMin 2 1 School of Electric Engineering and Information,Anhui University of Technology,Maanshan 243002,China 2 Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China Anhui University of Technology School of Electric Engineering and Information Maanshan China (GRID:grid.440650.3) (ISNI:***) University of Science and Technology of China Department of Modern Physics Hefei China (GRID:grid.59053.3a) (ISNI:***)

The effect of Dzialoshiski-Moriya (DM) interaction on the violation of bell inequality for thermal states of interacting qubits via a two-qubit XXZ spin chain is *** results imply that the DM interaction and anisotropy taking a large positive value can enhance the bell violation and improve the threshold temperatures of *** the comparison between the bell violation and thermal entanglement,we find that the threshold temperatures of thermal entanglement are higher than those of the bell *** implies that some states are entangled but the bell inequality is not violated.

关键词： bell violation threshold temperatures DM interaction

Evolution of bell-nonlocality of two cavity fields in the double Jaynes-Cummings model

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Chinese Optics Letters 2011年第7期9卷 83-86页

作者：缪龙江云坤 College of Physics and Information Engineering Fuzhou University

The bell-nonlocality of two initially entangled macroscopic fields in the double Jaynes-Cummings model is investigated. Moreover, the process by which detuning between the atomic transition frequency and the field frequency affects the evolution of the Beil-nonlocality of two macroscopic fields is studied. The effect of the disparitv between the two coupling strengths is discussed.

关键词： bell mode Evolution of bell-nonlocality of two cavity fields in the double Jaynes-Cummings model

Biased Random Number Generator Based on bell's Theorem

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Chinese Physics Letters 2016年第3期33卷 5-8页

作者：谭勇刚胡要花杨海峰 Physics and Information Engineering Department Luoyang Normal College

We propose a biased random number generation protocol whose randomness is based on the violation of the Clauser Home inequality. Non-maximally entangled state is used to maximize the bell violation. Due to the rotational asymmetry of the quantum state, the ratio of Os to ls varies with the measurement bases. The experimental partners can then use their measurement outcomes to generate the biased random bit string. The bias of their bit string can be adjusted by altering their choices of measurement bases. When this protocol is implemented in a device-independent way, we show that the bias of the bit string can still be ensured under the collective attack.

关键词： bell in test it In Biased Random Number Generator Based on bell’s Theorem of is that on

Cryptanalysis and Improvement of Quantum Private Comparison Protocol Based on bell Entangled States

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Communications in Theoretical Physics 2014年第8期61卷 210-214页

作者：刘文杰刘超陈汉武李志强刘志昊 Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science & Technology School of Computer and Software Nanjing University of Information Science & Technology School of Computer Science and Engineering Southeast University College of Information Engineering Yangzhou University

Recently, Liu et al. [Commun. Theor. Phys. 57(2012) 583] proposed a quantum private comparison protocol based on entanglement swapping of bell states, which aims to securely compare the equality of two participants' information with the help of a semi-honest third party(TP). However, the present study points out there is a fatal loophole in Liu et al.'s protocol, and TP can make bell-basis measurement to know all the participants' secret inputs without being detected. To fix the problem, a simple solution, which uses one-time eavesdropper checking with decoy photons instead of twice eavesdropper checking with bell states, is demonstrated. Compared with the original protocol,it not only reduces the bell states consumption but also simplifies the protocol steps.

关键词： quantum private comparison bell states entanglement swapping TP’s measurement attack improvement

Simulation of the Ising model, memory for bell states and generation of four-atom entangled states in cavity QED

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Science China(Physics,Mechanics & Astronomy) 2009年第5期52卷 700-707页

作者： ZHANG YingJie XIA YunJie MAN ZhongXiao GUO GuangCan Shandong Provincial Key Laboratory of Laser Polarization and Information Technology Department of PhysicsQufu Normal UniversityQufu 273165China Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China

A scheme is proposed to simulate the Ising model and preserve the maximum entangled states (bell states) in cavity quantum electrodynamics (QED) driven by a classical field with large detuning. In the strong driving and large-detuning regime, the effective Hamiltonian of the system is the same as the standard Ising model, and the scheme can also make the initial four bell states of two atoms at the maximum entanglement all the time. So it is a simple memory for the maximal entangled states. The system is insensitive to the cavity decay and the thermal field and more immune to decoherence. These advantages can warrant the experimental feasibility of the current scheme. Furthermore, the genuine four-atom entanglement may be acquired via two bell states through one-step implementation on four two-level atoms in the strong-driven model, and when two Greenberger-Horne-Zeilinger (GHZ) states are prepared in our scheme, the entangled cluster state may be acquired easily. The success probability for the scheme is 1.

关键词： Ising model bell states genuine four-party entangled state cluster state

Professor Tom bell FREng(1941-2008)

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金属热处理 2008年第6期33卷 122-123页

CONTRACTED EFFECT OF bell-SHADE SHAPE WELDING ARC AND ACCOMPANIED MAGNETIC FIELD WITH SPIRAL PIPE SHAPE

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中国有色金属学会会刊：英文版 1997年第2期7卷 96-99页

作者： Yu Jianrong, Zhang Jiaying , Jiang Lipei, Jiao Xiangdong Beijing Institute of Petrochemical Technology, Beijing 102600 Department of Mechanical Engineering,Tsinghua University, Beijing 100084 Jia Changshen, Shi Yaowu Xi′an Jiaotong University,

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ＣＯＮＴＲＡＣＴＥＤＥＦＦＥＣＴＯＦＢＥＬＬＳＨＡＤＥＳＨＡＰＥＷＥＬＤＩＮＧＡＲＣＡＮＤＡＣＣＯＭＰＡＮＩＥＤＭＡＧＮＥＴＩＣＦＩＥＬＤＷＩＴＨＳＰＩＲＡＬＰＩＰＥＳＨＡＰＥ①ＹｕＪｉａｎｒｏｎｇ，ＺｈａｎｇＪｉａｙｉｎｇ，ＪｉａｎｇＬｉｐｅｉ，...

关键词： longitudinal magnetic field bell shade shape welding arc contracted effect accompanied magnetic field spiral pipe shape

The geometry of violation of bell's inequality

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Chinese Optics Letters 2003年第6期1卷 357-360页

作者：谭维翰郭奇志 Department of Physics Shanghai University Shanghai 200436 Key Laboratory for Quantum Information and Measurements of Education Ministry Tsinghua University Beijing 100084 Department of Physics Shanghai University Shanghai 200436

The purpose of this paper is to deduce an analytical expression for the violation of bell's inequality by quantum theory and plane trigonometry, and expound the violation and maximal violation of the first, second type bell's inequality in detail. Further, we find out the sufficient conditions for the region in which bell's inequalities are violated.

关键词： bell on in it for The geometry of violation of bell’s inequality of

Application of Acupuncture and Moxibustion in Treatment of bell's Facial Palsy

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针刺研究 1994年第Z1期 122-123页