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Simpler criterion and flexibility of operation complexity for perfectly teleporting arbitrary n-qubit state with 2.-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 2.0039,China 2.{2. of physics,shaoguan university,shaoguan 512.05,China 1. Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of China School of Physics & Material Science Anhui University Hefei 230039 China2. Department of Physics Shaoguan University Shaoguan 512005 China

A criterion for whether a pure-state quantum channel consisting of 2. 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 2.0039,China 2.{2. of physics,shaoguan university,shaoguan 512.05,China 1. Key Laboratory of Optoelectronic Information Acquisition & Manipulation of Ministry of Education of China School of Physics & Material Science Anhui University Hefei 230039 China2. Department of Physics Shaoguan University Shaoguan 512005 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 (2.07) 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.(2.09) 115303) are made.

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

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 {2., Beijing 100084, China 2. department of physics, Peking {2., Beijing 100871, China) department of physics Tsinghua University Beijing 100084 China department of physics Peking University 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.

Anisotropic effect on the vibronic reduction factors

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Chinese Science Bulletin 2006年第21期51卷 2553-2558页

作者： QIU Qing-chun1,2.& QIAO Fen1,2.1. department of physics and IT, Medical College, Shantou {2.,Shantou 515041, China 2. department of physics, Shantou {2., Shantou 515063, China department of physics and IT Medical College Shantou University Shantou 515041 China department of physics Shantou University Shantou 515063 China

The reduction factors p and q defined by Ham in the Ee JT system and their relation 2.-p=1 have been well accepted and the concept of reduction factors is widely used in the studies of vibronic coupling. However, when the system is under the anisotropic conditions, the reduction factors and their relation will change accordingly. The first-order reduction factors p and q of Ee system were further studied using the method of unitary transformation here. The relation between p and q proposed by Ham was investigated under both conditions of the linear coupling and the anisotropic effects. The result demonstrated that the relation of 2.-p=1 was only correct for the linear vibronic coupling, but not correct when the anisotropic effect was considered. This result suggested that the anisotropic effect influence considerably the reduction factors, and hence the physical properties of materials. Our method could be also applied to other JT systems, especially the highly symmetric JT systems involving C60 molecules.

关键词：电子振动耦合声子交迭 Jahn-Teller效应各向异性

Potential energy surfaces for low-lying electronic states of SO_2

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Science China Chemistry 2006年第4期49卷 289-295页

作者： LI Anyang1, SUO Bing2. WEN Zhenyi2.& WANG Yubin2.1. Shanxi Key Laboratory of Physico-inorganic Chemistry, department of Chemistry, Northwest university, Xi’an 710069, China 2. Institute of Modern {2., Northwest university, Xi’an 710069, China 1. Shanxi Key Laboratory of Physico-inorganic Chemistry Department of Chemistry Northwest University Xi’an 710069 China 2. Institute of Modern physics Northwest University Xi’an 710069 China

The potential energy surfaces for the nine low-lying electronic states of SO2.have been constructed by using the multi-reference second order perturbation theory (MRPT2. with the basis set cc-pVTZ. The optimized geometries and the adiabatic excitation energies of these states are in good agreement with experiments and previous calculations. The crossings and avoided crossings dis- played in the potential energy surfaces are expounded.

关键词： cross of PES, MRPT2. SO2 (sulfur dioxide).

The influence of laser pulse on the photoabsorption spectra of Li atom in strong external field

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Science China(physics,Mechanics & Astronomy) 2006年第2期49卷 178-186页

作者： WANG Dehua1 & LIN Shenglu2.1. School of physics and Electronic Engineering, Yantai Normal university, Yantai 2.402., China {2., Shandong Normal university, Jinan 2.0014, China 1. School of physics and Electronic Engineering Yantai Normal University Yantai 264025 China 2. department of physics Shandong Normal University Jinan 250014 China

Using the time-dependent perturbation theory and the calculation formula of the single- and double-pulse absorption spectra of the atom in strong external fields, we calculate the single- and double-pulse absorption spectra of Li atom in strong magnetic field for different pulse widths. The results show that a pulse of some width can reduce the contribution of the short period closed orbits and eliminate the contribution of the long period orbits. Compared with the single-pulse absorption spectra, we found that for some phase differences, the double-pulse laser absorption spectra are strengthened; while for others, they are reduced. Therefore, we can use the pulse laser to control the oscillation of the absorption spectra and obtain the optimization object.

关键词： laser pulse closed orbit absorption spectra.

Effect of Substrate-Water Interaction on the Wetting Behavior in Water-Oil and Substrate-Water-Oil Systems

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Wuhan university Journal of Natural Sciences 2003年第4A期8卷 1097-1102页

作者： Yuan Yin-quan 1,2., Zou Xian-wu 1 , Jin Zhun-zhi 1 1. School of physics and Technology, Wuhan university, Wuhan 430072. Hubei, China {2., Xiaogan university, Xiaogan 432.00, Hubei, China Wuhan university School of Physics and Technology Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) Xiaogan university Department of Physics Xiaogan Hubei China (GRID:grid.49470.3e) Wuhan university School of Physics and Technology Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***)

The effects of the substrate-water interaction on the wetting behavior in water-oil and surfactant-water-oil systems confined by one substrate which has the preferential interaction to one species of particles have been investigated by using the free energy analysis and discontinuous molecular dynamic simulations. As the preferential interaction between the substrate and water particles varies from small repulsion to large attraction, the partial drying, partial wetting and complete wetting state are observed in sequence. In addition, the wetting behavior of surfactant aqueous solution on the substrate is not only dependent on the interaction, but also limited by the maximum equilibrium concentration of surfactants at the interface.

关键词： wetting behavior wetting transition preferential interaction substrate

Direct CP violation in hadronic B decays

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Science China(physics,Mechanics & Astronomy) 2006年第3期49卷 357-366页

作者： HONG Bihai1,2.& Lü Caidian3 1. department of physics, Lishui {2., Lishui 32.000,China 2. department of physics, Shanghai Jiaotong {2., Shanghai 2.0030, China 3. Institute of High Energy physics, Beijing 100049,China department of physics Lishui University Lishui 323000 China department of physics Shanghai Jiaotong University Shanghai 200030 China Institute of High Energy physics Beijing 100049 China

There are different approaches for the hadronic B decay calculations, recently. In this paper, we upgrade three of them, namely factorization, QCD factorization and the perturbative QCD approach based on kT factorization, using new parameters and full wave functions. Although they get similar results for many of the branching ratios, the direct CP asymmetries predicted by them are different, which can be tested by recent experimental measurements of B factories.

关键词： CP violation hadronic B decay factorization.

Stochastic resonance in surface catalytic oxidation of carbon monoxide induced by colored noise

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Science China Chemistry 2004年第2期47卷 106-112页

作者： GONG Yubing1,2. HOU Zhonghuai1 & XIN Houwen1 1. department of Chemical physics, {2. of Science and Technology of China, Hefei 2.002., China 2. department of physics, Yantai Teachers {2., Yantai 2.402., China 1. department of Chemical physics University of Science and Technology of China 230026 Hefei China 2. department of physics Yantai Teachers University 264025 Yantai China

The dynamical behavior of surface catalytic oxidation reaction of Pt(110)/CO+O2.modulated by colored noise, under the condition of specific temperature, has been investigated when the partial pressure of CO gas is near the supercritical Hopf bifurcation point. By computer simulation the oscillation and stochastic resonance induced by colored noise are observed. The influences of the intensity and correlation time of colored noise on stochastic resonance are discussed. The range of sensitivity of the system to the environmental fluctuation is analyzed.

关键词： colored noise, stochastic resonance, surface catalytic reaction of Pt(110)/CO+O2. supercritical Hopf bifurcation, signal-to-noise ratio (SNR).