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	1. Quantum computation in semiconductor quantum dots of electron-spin asymmetric anisotropic exchange
	Xiang Hao,Shiqun Zhu
	Physics 12 September 2008
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	Abstract:The universal quantum computation is obtained when there exists asymmetric anisotropic exchange between electron spins in coupled semiconductor quantum dots. The asymmetric Heisenberg model can be transformed into the isotropic model through the control of two local unitary rotations for the realization of essential quantum gates. The rotations on each qubit are symmetrical and depend on the strength and orientation of asymmetric exchange. The implementation of the axially symmetric local magnetic fields can assist the construction of quantum logic gates in anisotropic coupled quantum dots. This proposal can efficiently use each physical electron spin as a logical qubit in the universal quantum computation.
	TO cite this article:Xiang Hao,Shiqun Zhu. Quantum computation in semiconductor quantum dots of electron-spin asymmetric anisotropic exchange[OL].[12 September 2008] http://en.paper.edu.cn/en_releasepaper/content/24010


	2. Density-Matrix Renormalization-Group Study of the Entanglement andEntropy in Antiferromagnetic Heisenberg Spin Chain with Domain Walls
	Ren Jie ,Zhu Shiqun
	Physics 10 September 2008
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	Abstract:By using the method of density-matrix renormalization-group theory, the ground state entanglement in the spin$-1/2$ isotropic antiferromagnetic Heisenberg chain is studied when there are domain walls generated by a boundary magnetic field. It is found that the pairwise entanglement of odd-bond two qubits decreases and even-bond two qubits increases to stable values alternately when the magnetic field increases. The pairwise entanglement of odd-bond can equal to that of even-bond for a suitable value of the magnetic field. When the magnetic field increases further, the entanglement of even-bond can be larger than that of odd-bond. The entanglement entropy increases and then almost saturates as the number of spin sites increases. Due to the domain walls, the entanglement entropy of even-bond decreases to a minimum value and then increases as the magnetic field increases.
	TO cite this article:Ren Jie ,Zhu Shiqun . Density-Matrix Renormalization-Group Study of the Entanglement andEntropy in Antiferromagnetic Heisenberg Spin Chain with Domain Walls[OL].[10 September 2008] http://en.paper.edu.cn/en_releasepaper/content/23932

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	3. Precise predictions for the Higgs production in association with a W-boson pair at ILC
	Song Mao,Ma Wen-Gan,Zhang Ren-You,Guo Lei,Wang Shao-Ming
	Physics 04 September 2008
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	Abstract:The Higgs-boson production in association with a W-boson pair at $e^+e^-$ linear colliders is one of the important processes in probing the coupling between Higgs-boson and vector gauge bosons and discovering the signature of new physics. We describe the impact of the complete electroweak(EW) radiative corrections of ${\\\\\\\\\\\\\\\\cal O}(\\\\\\\\\\\\\\\\alpha_{ew})$ to this process in the standard model(SM) at the International Linear Collider(ILC), and investigate the dependence of the lowest-order(LO) and EW next-to-leading order(NLO) corrected cross sections on colliding energy $\\\\\\\\\\\\\\\\sqrt{s}$ and Higg-boson mass. The LO and NLO EW corrected distributions of the invariant mass of W-boson pair and the transverse momenta of final $W$- and Higgs-boson are presented. Our numerical results show that the relative EW radiative correction($\\\\\\\\\\\\\\\\delta_{ew}$) varies from $-19.4\\\\\\\\\\\\\\\\%$ to $0.2\\\\\\\\\\\\\\\\%$ when $m_H=120~GeV$ and $\\\\\\\\\\\\\\\\sqrt{s}$ goes up from $300~GeV$ to $1.2~TeV$.
	TO cite this article:Song Mao,Ma Wen-Gan,Zhang Ren-You, et al. Precise predictions for the Higgs production in association with a W-boson pair at ILC[OL].[ 4 September 2008] http://en.paper.edu.cn/en_releasepaper/content/23778


	4. Local Molecular Structure of (MnO6)10- coordination complex for Mn2+ ions in A{[(CH3)2N]2OPOPO[N(CH3)2]2}(ClO4)2:Mn2+ (A=Mg, Zn): a Complete Energy Matrices Study
	Lu Cheng,Kuang Xiao-Yu,Zhou Kuang-Wei
	Physics 18 July 2008
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	Abstract:A simple theoretical method is introduced for studying the local molecular structure of (MnO6)10- coordination complex. By diagonalizing the complete energy matrices of the electron-electron repulsion, the ligand field and the spin-orbit coupling for d5 configuration ion in a trigonal ligand field, the local distortion structure of (MnO6)10- coordination complex for Mn2+ ions in A{[(CH3)2N]2OPOPO[N(CH3)2]2}(ClO4)2: Mn2+ (A=Mg, Zn) complex systems are investigated. Both the second-order zero-field splitting parameter b20 and the fourth-order zero-field splitting parameter b40 are taken simultaneously in the structural investigation. From the EPR calculations, the local structure parameters R=2.180Å, θ=56.384° for Mn2+ ions in Mg{[(CH3)2N]2OPOPO[N(CH3)2]2}(ClO4)2:Mn2+ and R=2.199Å, θ=56.520° for Mn2+ ions in Zn{[(CH3)2N]2OPOPO[N(CH3)2]2}(ClO4)2:Mn2+ complex systems are determined, respectively. It is found that the theoretical calculation results of the EPR spectra for Mn2+ ions in A{[(CH3)2N]2OPOPO[N(CH3)2]2}(ClO4)2:Mn2+ (A=Mg, Zn) complex systems are in good agreement with the experimental values.
	TO cite this article:Lu Cheng,Kuang Xiao-Yu,Zhou Kuang-Wei. Local Molecular Structure of (MnO6)10- coordination complex for Mn2+ ions in A{[(CH3)2N]2OPOPO[N(CH3)2]2}(ClO4)2:Mn2+ (A=Mg, Zn): a Complete Energy Matrices Study[OL].[18 July 2008] http://en.paper.edu.cn/en_releasepaper/content/22948


	5. The phase control of spontaneous emission from a microwave-driven three-atom embedded in Photonic Crystals
	Ke Zhang,Yan ping Zhu,Han zhuang Zhang
	Physics 11 March 2008
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	Abstract:Through dressed states picture, we investigate the spontaneous emission spectrum of a microwave-driven three-level atom embedded in Photonic Crystals (PCs) reservoir. The two models: \\\\\\\"upper level coupling\\\\\\\" and \\\\\\\"lower level coupling\\\\\\\" are under research. Due to the effect of the density of state in PCs, the fluorescence spectra display a different behavior compared with that in vacuum when the phase of the microwave field changes.
	TO cite this article:Ke Zhang,Yan ping Zhu,Han zhuang Zhang. The phase control of spontaneous emission from a microwave-driven three-atom embedded in Photonic Crystals[OL].[11 March 2008] http://en.paper.edu.cn/en_releasepaper/content/19204


	6. Electrically controlled Kerr effect in magnetophotonic crystal based on nematic liquid crystal
	Da Haixia,Xu Ping,Wu Jianchun,Li Zhenya
	Physics 21 February 2008
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	Abstract:An electrically controllable Kerr effect in magnetophotonic crystal consisting of magnetic materials and nematic liquid crystals is presented based on the properties of nematic liquid crystals. Numerical results show that Kerr effect is changed remarkably by adjusting the permittivity of liquid crystal, and the maximum value of kerr rotation angle becomes large as the permittivity of liquid crystal increases. Such properties demonstrate the possibility of tunable magneto-optical devices based on nematic liquid crystal.
	TO cite this article:Da Haixia,Xu Ping,Wu Jianchun, et al. Electrically controlled Kerr effect in magnetophotonic crystal based on nematic liquid crystal[OL].[21 February 2008] http://en.paper.edu.cn/en_releasepaper/content/18768


	7. Approaches to the Natural World Based on Math-Physical Three Principles
	Ye Ying
	Physics 01 February 2008
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	Abstract:Synthesized modern mathematics and physics, the author proposes the approaches to the natural world with math-physical three principles. The first principle is the Lagrange-Hamilton principle where L is Lagrange function of system and G is transform group, while q is space and t is time and ds2 is the metric of space-time. The second principle is the Newton-Einstein principle where F is strength of field, Ω is curvature and ω is connection. The third principle is the Gauss- Stokes principle in which Ω is curvature and ω is connection, while χ is characteristic index and M is manifold on real, complex, quaternion or octonion. The three principles can be applied to physical systems with real, complex, quaternion and octonion phases, which produce respectively Euclid-Newton system, Riemman-Einstein system, Finsler-Yang system and a new one.
	TO cite this article:Ye Ying. Approaches to the Natural World Based on Math-Physical Three Principles[OL].[ 1 February 2008] http://en.paper.edu.cn/en_releasepaper/content/18548


	8. Geometrical Structures and Electronic Properties of Si-doped TiO2
	Yang Kesong ,Dai Ying,Huang Baibiao
	Physics 24 January 2008
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	Abstract:We have investigated the geometrical structures and electronic properties of Si-doped anatase and rutile TiO2 using spin-polarized density functional theory calculations based on the plane-wave method. Our calculated results show that the valence band maximum has a little raise in substitutional Si to O doped anatase and rutile TiO2, and the Fermi level is pinned in the conduction band edge, indicating typical n-type characteristic of semiconductor. In substitutional Si to O doped anatase TiO2, the transition of electrons excited form the valence band to the conduction band above the Fermi level may induce a redshift of optical absorption edge, while the electron transition energy has no obvious decrease in substitutional Si to O doped rutile TiO2. In substitutional Si to Ti doped anatase TiO2, the electron transition energy from the valence band to the conduction band has a decrease about 0.25eV, which may be responsible for the experimental redshift of optical absorption edge. A decrease of excitation energy about 0.2eV is also observed in substitutional Si to Ti doped rutile TiO2. Our results also indicated that the synthesis substitutional Si to Ti doped anatase and rutile TiO2 is preferred under both O-rich and Ti-rich growth conditions.
	TO cite this article:Yang Kesong ,Dai Ying,Huang Baibiao. Geometrical Structures and Electronic Properties of Si-doped TiO2[OL].[24 January 2008] http://en.paper.edu.cn/en_releasepaper/content/18333


	9. Formation and transport of granular heaps in vertically vibrated containers with periodic corrugated bottoms
	Hua Zhang,Qi Wang,Guoqing Miao
	Physics 14 January 2008
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	Abstract:We report the formation and transportation of granular heaps in vertically vibrated containers with two types of periodic corrugated bottoms, one with a periodic array of ten identical Plexiglas rectangles mounted (named periodic container), and other with single-step (named single-step container). For the periodic container, when the excitation was weaker, several small heaps formed, and the number of them was the same as that of the rectangles on the bottom. As the excitation increased, the system presented three types of states：single well-defined heap, weaker wave, and stronger wave. Some local convections were observed in the interior of heap. For the single-step container, we observed the transportation of a heap toward step. We propose that the compressive force from the ambient gas plays a crucial role for the movement of the heap.
	TO cite this article:Hua Zhang,Qi Wang,Guoqing Miao. Formation and transport of granular heaps in vertically vibrated containers with periodic corrugated bottoms[OL].[14 January 2008] http://en.paper.edu.cn/en_releasepaper/content/18032


	10. Frequency-dependent transport properties for two-channel Luttinger liquid quantum wires
	Cheng Fang,Zhou Guanghui
	Physics 01 June 2007
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	Abstract:We study theoretically the ac transport properties for clean two-channel spinless nonchiral and chiral Luttinger liquid (LL) quantum wires with leads (reservoirs) in the presence of both inter- and intra-channel electron-electron nteractions. Using the equation of motion approach of bosonization technique within linear response theory, we have found that the ac conductivities for the two types of LL quantum wires are generally an oscillation function of the electron-electron interaction strengths, the ratio of Fermi velocities in the channels, the driving frequency and the measurement position in the wire. But the physics is expected to be quite different for these two types of systems and the explanations for this difference are discussed. However, in the dc limit the conductivities for the two types of systems all tend to the conductance quanta of $2e^2/h$. This means that the electron-electron interactions does not renormalize the dc conductivity for finite LL quantum wire systems, which is in agreement with the previous researches.
	TO cite this article:Cheng Fang,Zhou Guanghui. Frequency-dependent transport properties for two-channel Luttinger liquid quantum wires[OL].[ 1 June 2007] http://en.paper.edu.cn/en_releasepaper/content/13208

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