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Simpler criterion and flexibility of operation complexity for perfectly teleporting arbitrary n-qubit state with 2n-qubit pure state

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Science china(physics,Mechanics & Astronomy) 2010年第11期53卷 2069-2073页

作者： ZUO XueQin 1,LIU YiMin 2,ZHANG ZiYun 1,ZHANG Wen 1 & ZHANG ZhanJun 1 1 Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of china,School of physics & Material Science,Anhui university,Hefei 230039,china 2 department of physics,shaoguan university,shaoguan 512005,china Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of china School of Physics & Material Science Anhui University Hefei China department of physics Shaoguan University Shaoguan China

A criterion for whether a pure-state quantum channel consisting of 2n qubits averagely distributed between two nodes can be used for perfectly teleporting an arbitrary n-qubit state via Bell-state measurements is ***,a matrix is composed of the coefficients of the known channel state and whether the matrix is unitary decides the *** the criterion is apparently different from the usual standard entanglement criterion (USEC),its applicability is enlarged and verified by other measuring *** analyses have further simplified the resultant criterion,so that a much simpler criterion than the USEC is conclusively ***,the flexibility of operation complexity between the non-unitary measurements and the unitary reconstructions is explicitly exhibited.

关键词： quantum teleportation criterion flexibility of operation complexity measuring bases reconstruction

Perfect teleportation of an arbitrary three-qubit state with the highly entangled six-qubit genuine state

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Science china(physics,Mechanics & Astronomy) 2010年第11期53卷 2059-2063页

作者： YIN XiaoFeng 1,LIU YiMin 2,ZHANG ZiYun 1,ZHANG Wen 1 & ZHANG ZhanJun 1 1 Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of china,School of physics & Material Science,Anhui university,Hefei 230039,china 2 department of physics,shaoguan university,shaoguan 512005,china Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of china School of Physics & Material Science Anhui University Hefei China department of physics Shaoguan University Shaoguan China

The perfect teleportation of an arbitrary three-qubit state with the highly entangled six-qubit genuine state introduced by Borras et al.(***.A: ***.40 (2007) 13407) is *** appropriate measuring bases the sender can take and the corresponding unitary operations the receiver should execute in terms of the sender’s measurement outcome are explicitly *** flexibility between the measurement difficulty and the reconstruction difficulty is ***,discussions and comparisons between our scheme and the recent incomplete scheme (Choudhury et al,***.A: ***.42 (2009) 115303) are made.

关键词： quantum teleportation highly entangled six-qubit genuine state measuring bases reconstruction operation flexibility

Assisted Cloning and Orthogonal Complementing of an Arbitrary Unknown Two-Qubit Entangled State

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Communications in Theoretical physics 2006年第11期 849-852页

作者： FANG Ming,~1 LIU Yi-Min,~(2,3) LIU Jun,~1 SHI Shou-Hua,~1 and ZHANG Zhan-Jun~(1,3,+) 1 School of physics & Material Science, Anhui university, Hefei 230039, china 2 department of physics, shaoguan university, shaoguan 512005, china 3 The State Key Laboratory of Magnetic Resonance and Atomic and Molecular physics, Wuhan Institute of physics and Mathematics, the Chinese Academy of Sciences, Wuhan 430071, china

Based on A.K. Pati’s original idea [Phys. Rev. A 61 (2000) 022308] on single-qubit-state-assisted clone, very recently Zhan has proposed two assisted quantum cloning protocols of a special class of unknown two-qubit entangled states [Phys. Lett. A 336 (2005) 317]. In this paper we further generalize Zhan’s protocols such that an arbitrary unknown two-qubit entangled state can be treated.

关键词： quantum cloning arbitrary two-qubit entangled state two-qubit projective measurement

A Pseudo-Spectral Approximation for theSystem of Generalized Zakharov Equations

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Communications in Nonlinear Science and Numerical Simulation 1999年第3期4卷 3-5页

作者： Shaomei FANG(department of Mathematics, shaoguan university, shaoguan 512005, china)E-mail: bnlu@*** department of Mathematics Shaoguan University Shaoguan 512005 China

IntroductionInthispaper,weareconcernedwiththetheoreticalanalysisofthefullydiscretepseudospectraJapproximationofthesystemofgenerajizedZakharovequationswithperiodicinitialconditionsbywherei=M,q(.)denotesacontinuousreal-... 详细信息

关键词： Zakharov equation pseudo-spectral approximation

Long time behavior for damped generalized coupled nonlinear wave equations. Ⅱ.Unbounded domain

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Communications in Nonlinear Science and Numerical Simulation 2001年第2期6卷 107-110页

作者： Shaomei FANG and Boling GUO department of Mathematics, shaoguan university, shaoguan 512005, china Graduate School, china Academy of Engineering physics, Beijing 100088, china Center for Nonlinear Studies, Institute of Applied physics and Computational department of Mathematics Shaoguan University Shaoguan 512005 China Graduate School China Academy of Engineering Physics Beijing 100088 China Center for Nonlinear Studies Institute of Applied Physics and Computational mathematics Beijing 100088 China

In this paper, by using a priori estimates in the weighted space, the existence of the global attractor for the damped generalized coupled nonlinear wave equations in an unbounded domain is obtained.

关键词： unbounded domain weighted space attractor

Liver X receptor agonist T0901317 reduces atherosclerotic lesions in apoE^(-/-) mice by up-regulating NPC1 expression

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Science china(Life Sciences) 2008年第5期51卷 418-429页

作者： OU Xiang1,2, DAI XiaoYan1, LONG ZhiFeng3, TANG YaLing1, CAO DongLi1, HAO XinRui1, HU YanWei1, LI XiaoXu1 & TANG ChaoKe1 1 Institute of Cardiovascular Research, Key Laboratory for Atherosclerology of Hunan Province, university of South china, Heng- yang 421001, china 2 department of Physiology, Medical College of shaoguan university, shaoguan 512026, china 3 department of Histology and Embryology, university of South china, Hengyang 421001, china Institute of Cardiovascular Research Key Laboratory for Atherosclerology of Hunan Province University of South China Hengyang China department of Physiology Medical College of Shaoguan University Shaoguan China department of Histology and Embryology University of South China Hengyang China

In this study, we studied the effect of liver X receptor (LXR) agonist T0901317 on Niemann-Pick C1 protein (NPC1) expression in apoE-/- mice. Male apoE-/- mice were randomized into 4 groups, baseline group (n=10), control group (n=14), treatment group (n=14) and prevention group (n=14). All of the mice were fed with a high-fat/high-cholesterol (HFHC) diet containing 15% fat and 0.25% cholesterol. The baseline group treated with vehicle was sacrificed after 8 weeks of the diet. The control group and the prevention group were treated with either vehicle or T0901317 daily by oral gavage for 14 weeks. The treatment group was treated with vehicle for 8 weeks, and then was treated with the agonist T0901317 for additional 6 weeks. Gene and protein expression was analyzed by real-time quantitative PCR, immunohistochemistry and Western blotting, respectively. Plasma lipid concentrations were measured by commercially enzymatic methods. We used RNA interference technology to silence NPC1 gene expression in THP-1 macrophage-derived foam cells and then detected the effect of LXR agonist T0901317 on cholesterol efflux. Plasma triglyceride (TG), total cholesterol (TC), high density lipoprotein cholesterol (HDL-C) and apoA-I concentrations were markedly increased in T0901317-treated groups. T0901317 treatment reduced the aortic atherosclerotic lesion area by 64.2% in the prevention group and 58.3% in the treatment group. LXR agonist treatment increased NPC1 mRNA expression and protein levels in the small intestine, liver and aorta of apoE-/- mice. Compared with the normal cells, cholesterol efflux of siRNA THP-1 macrophage-derived foam cells was significantly decreased, whereas cholesterol efflux of LXR agonist T0901317-treated THP-1 macrophage-derived foam cells was significantly increased. Our results suggest that LXR agonist T0901317 inhibits atherosclerosis development in apoE-/- mice, which is related to up-regulating NPC1 expression.

关键词： Niemann-Pick C1 protein liver X receptor agonist atherosclerosis plaque

Particle tunnels across the horizon of Garfinkle-Horowitz-Strominger dilaton black hole

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Science china(physics,Mechanics & Astronomy) 2007年第5期50卷 601-610页

作者： FANG HengZhong1 & ZHAO Zheng2 1 department of physics, china university of Petroleum, Dongying 257061, china 2 department of physics, Beijing Normal university, Beijing 100875, china department of physics China University of Petroleum Dongying China department of physics Beijing Normal University Beijing China

We promote the work of Parikh and Wilczek on the black hole radiation to the emission of massive and charged particles from Garfinkle-Horowitz-Strominger black hole. The energy and charge of the space-time are conservational during the course of the evaporation. The calculation shows that the emission spectrum is not precisely thermal, while has a correction, and the conclusion supports the view- point of information conservation.

关键词： Hawking radiation, black body spectrum, barrier, information loss, entropy of black hole, Komar energy

Quantum statistical entropy corresponding to cosmic horizon in five-dimensional spacetime

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Science china(physics,Mechanics & Astronomy) 2008年第2期51卷 140-146页

作者： ZHAO Ren1,2 & ZHANG ShengLi1 1 department of Applied physics, Xi’an Jiaotong university, Xi’an 710049, china 2 department of physics, Shanxi Datong university, Datong 037009, china department of Applied physics Xi’an Jiaotong University Xi’an China department of physics Shanxi Datong University Datong China

The generalized uncertainty relation is introduced to calculate the quantum statis-tical entropy corresponding to cosmic horizon. By using the new equation of state density motivated by the generalized uncertainty relation, we discuss entropies of Bose field and Fermi field on the background of five-dimensional spacetime. In our calculation, we need not introduce cutoff. There is no divergent logarithmic term in the original brick-wall method. And it is obtained that the quantum statistical en-tropy corresponding to cosmic horizon is proportional to the area of the horizon. Further it is shown that the entropy corresponding to cosmic horizon is the entropy of quantum state on the surface of horizon. The black hole's entropy is the intrinsic property of the black hole. The entropy is a quantum effect. In our calculation, by using the quantum statistical method, we obtain the partition function of Bose field and Fermi field on the background of five-dimensional spacetime. We provide a way to study the quantum statistical entropy corresponding to cosmic horizon in the higher-dimensional spacetime.

关键词： quantum statistical entropy generalized uncertainty relation high-dimensional spacetime

Density-functional formula for strongly correlated systems

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Progress in Natural Science:Materials International 2005年第5期15卷 395-401页

作者： WANG Huaiyu1*, HAN Rushan2 and CHEN Nanxian1(1. department of physics, Tsinghua university, Beijing 100084, china 2. department of physics, Peking university, Beijing 100871, china) Dept. of Phys. Tsinghua Univ. Beijing 100084 China Dept. of Phys. Peking Univ. Beijing 100871 China

Density functional method is applied for strongly correlated systems. Based on the assumption that the systems are composed of electrons in singly-occupied orbitals and those in doubly-occupied orbitals, a set of self-consistent equations are obtained by standard variation procedure. The equations consist of two parts. One part is to solve the wave functions of the electrons in singly-occupied orbitals and the other is to solve the wave functions of the electrons in doubly-occupied orbitals. The physical meanings of the terms appearing in the equations are discussed.

关键词： density-functional theory strongly correlated systems doubly-occupied orbital two-particle wave function self-consistent equations.