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Electronic Absorption Spectroscopy of H2X （X=O, Te, Po）： Theoretical Treatment of spin-orbit Effects

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Chinese Journal of Chemical Physics 2009年第2期22卷 171-177页

作者： Chérif A. A. Ndoye Chantal Daniel Laboratoire de Chimie Quantique Institut de Chimie UMR 7177 CNRS-Université de Strasbourg 4 Rue Blaise Pascal 67000 Strasbourg France

The electronic spectroscopy of H2X （X=O, Te, Po） was investigated by means of spinorbit configuration interaction （EPCISO） and restricted active space state interaction （SORASSI）. The transition energies to the low-lying singlet and triplet states of H2O, in which the SO interaction is zero, compare rather well with the experimental data as well as to other theoretical values. The theoretical electronic absorption spectrum is characterized by three allowed transitions A^1B1 （2px（O）→σ^＊g/3s（O））, B^1A1（σg→σ^＊g/3s（O）） and A^1S2（σg→σ^＊u） calculated at 7.68, 9.94, and 11.72 eV, respectively. The theoretical absorption spectra of H2X （X=Te, Po） are shifted to the red with the A^1B1 （npx（X）→σ^＊g） states calculated at 5.06 eV （H2Te） and 4.40 eV （H2Po） and the A^1B2 （σg→σ^＊u） states calculated at 7.89 eV （H2Te） and 7.77 eV （H2Po）. The largest SO splitting amounts to 0.34 eV and is found for the lowest a^3A1 of H2Po. In H2Te the SO effects are still negligible with a maximum splitting of 0.04 eV for the lowest a^3B2. The two methods lead to comparable results but the EPCISO approach depends strongly on the reference wavefunction.

关键词： spin-orbit Excited state Group Ⅵ dihydride

Dual-band and ultra-broadband photonic spin-orbit interaction for electromagnetic shaping based on single-layer silicon metasurfaces

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Photonics Research 2019年第5期7卷 586-593页

作者： XIN XIE MINGBO PU XIONG LI KAIPENG LIU JINJIN JIN XIAOLIANG MA XIANGANG LUO State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering Institute of Optics and ElectronicsChinese Academy of Sciences School of Optoelectronics University of Chinese Academy of Sciences School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China

Achieving electromagnetic wave scattering manipulation in the multispectral and broad operation band has been a long pursuit in stealth applications. Here, we present an approach by using single-layer metasurfaces composed of space-variant amorphous silicon ridges tiled on a metallic mirror, to generate high-efficiency dual-band and ultra-wideband photonic spin-orbit interaction and geometric phase. Two scattering engineered metasurfaces have been designed to reduce specular reflection;the first one can suppress both specular reflectances at 1.05–1.08 μm and 5–12 μm below 10%. The second one is designed for an ultra-broadband of 4.6–14 μm, which is actually implemented by cleverly connecting two bands of 4.6–6.1 μm and 6.1–14 μm. Furthermore, the presented structures exhibit low thermal emission at the same time due to the low absorption loss of silicon in the infrared spectrum, which can be regarded as an achievement of laser–infrared compatible *** believe the proposed strategy may open a new route to implement multispectral electromagnetic modulation and multiphysical engineering applications.

关键词： Dual-band ultra-broadband photonic spin-orbit interaction electromagnetic shaping based

Enhancing von Neumann entropy by chaos in spin–orbit entanglement

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Chinese Physics B 2019年第10期28卷 153-159页

作者： Chen-Rong Liu Pei Yu Xian-Zhang Chen Hong-Ya Xu Liang Huang Ying-Cheng Lai School of Physical Science and Technology and Key Laboratory for Magnetism and Magnetic Materials of MOELanzhou UniversityLanzhou 730000China School of Electrical Computerand Energy EngineeringArizona State UniversityTempeAZ 85287USA Department of Physics Arizona State UniversityTempeAZ 85287USA

For a quantum system with multiple degrees of freedom or subspaces, loss of coherence in a certain subspace is intimately related to the enhancement of entanglement between this subspace and another one. We investigate intra-particle entanglement in two-dimensional mesoscopic systems, where an electron has both spin and orbital degrees of freedom and the interaction between them is enabled by Rashba type of spin-orbit coupling. The geometric shape of the scattering region can be adjusted to produce a continuous spectrum of classical dynamics with different degree of chaos. Focusing on the spin degree of freedom in the weak spin-orbit coupling regime, we find that classical chaos can significantly enhance spin-orbit entanglement at the expense of spin coherence. Our finding that classical chaos can be beneficial to intra-particle entanglement may have potential applications such as enhancing the bandwidth of quantum communications.

关键词： spin-orbit entanglement chaos von Neumann entropy spin decoherence

Quantum Entanglement in a spin-orbit Coupled Bose–Einstein Condensate

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Communications in Theoretical Physics 2015年第12期64卷 644-648页

作者：黄奕筱惠宁菊刘万芳叶恩钾胡征达 School of Science Zhejiang University of Science and Technology Xi'an University of Technological School of Physics and Electric Engineering Anqing Teachers College School of Science Jiangnan University

We study the spin-field and the spin-spin entanglement in the ground state of a spin-orbit coupled Bose–Einstein condensate. It is found that the spin-field and the spin-spin entanglement can be induced by the spin-orbit coupling. By mapping the system to the Dicke-like model,the system exhibits a quantum phase transition from a normal(spin balanced) phase to superradiant(spin polarized) phase. The Dicke-like phase transition can be captured by the spin-field and the spin-spin entanglement arising from the spin-orbit coupling. The spin-field and the spin-spin entanglement increase as the Raman coupling increases in the superradiant phase,while they decrease with the Raman coupling increasing in the normal phase. We also consider the effect of a finite detuning on these entanglement show that the presence of the detuning suppresses the spin-field and the spin-spin entanglement.

关键词： quantum entanglement spin-orbit coupling Bose–Eins

CALCULATION OF spin-orbit COUPLING COEFFICIENTS IN MODEL POTENTIAL THEORY FOR MULTI-ELECTRON ATOMS OR IONS

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Chinese Science Bulletin 1992年第18期37卷 1533-1536页

作者：王麓雅文根旺 Department of Physics Hunan Normal University Changsha 410081 PRCDepartment of Physics Hunan Normal University Changsha 410081 PRC

Ⅰ. INTRODUCTIONApplying the approximate model potential theory to multi-electron atoms or ions suggested in Zheng’s papers, the authors of the present note have derived a general expression for the calculation of matrix elements of the operator r^k with arbitrary power order k, which can be applied in calculating various transition oscillator strengths. In order to study the multiplet structure at any excited state, we need to calculate the spin-orbit coupling ener-

关键词： quantum chemistry atomic structure potential model spin-orbit coupling

spin-orbit Electronic Structure of the ScBr Molecule

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Journal of Modern Physics 2011年第10期2卷 1172-1177页

作者： Alaa Hamdan Mahmoud Korek 不详

A theoretical investigation of the spin-orbit electronic states of the molecule ScBr has been performed via CASSCF and MRCI (single and double excitations with Davidson correction) calculations. spin-orbit effects have been introduced through semi-empirical spin orbit pseudo-potential for scandium while they have been neglected for bromine. Potential energy curves for 42 electronic states in the representation Ω(±) have been determined along with the corresponding spectroscopic constants. The comparison of the present results with those available in the literature shows a good agreement. New results have been investigated in present work for 30 electronic states in the representation Ω(±) for the first time.

关键词： ScBr Molecule ab Initio Calculation spin-orbit Calculation Potential Energy Curves Spectroscopic Constants

Effect of the spin-orbit Interaction (Heisenberg XYZ Model) on Partial Entangled Quantum Network

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Journal of Quantum Information Science 2014年第1期4卷 1-17页

作者： Abdel-Haleem Abdel-Aty Nordin Zakaria Lee Yen Cheong Nasser Metwally Computer and Information Science Department Universiti Teknologi Petronas Tronoh Malaysia Fundamentals and Applied Science Department Universiti Teknologi Petronas Tronoh Malaysia Mathematics Department College of Science University of Bahrain Sakhir Kingdom of Bahrain

Dzyaloshiniskii-Moriya (DM) interaction in three directions (Dx, Dy and Dz) is used to generate entangled network from partially entangled states in the presence of the spin-orbit coupling. The effect of the spin coupling on the entanglement between any two nodes of the network is investigated. The entanglement is quantified using Woottores concurrence method. It is shown that the entanglement decays as the coupling increases. For larger values of the spin coupling, the entanglement oscillates within finite bounds. For the initially entangled channels, the upper bound does not exceed its initial value, whereas the entanglement reaches its maximum value for the channels generated via indirect interaction.

关键词： Quantum Network Entanglement spin-orbit Interaction

spin manipulations through electrical and thermoelectrical transport in magnetic tunnel junctions

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Science China(Physics,Mechanics & Astronomy) 2013年第1期56卷 166-183页

作者： ZHU ZhenGang SU Gang School of Electronics Eletrical and Communication EngineeringUniversity of Chinese Academy of Sciences Institut fr Physik Martin-Luther-UniversittHalle-Wittenberg Nanotechnikum-WeinbergHeinrich-Damerow-Strasse 4 D-06120 Halle(Saale)Germany School of Physics University of Chinese Academy of Sciences

A brief review is presented,which includes the direct current,alternate current,electrical and thermoelectrical transport as well as spin transfer effect in a variety of spin-based nanostructures such as the magnetic tunnel junction(MTJ),ferromagnet(FM)-quantum dot(QD)/FM-FM,double barrier MTJ,FM-marginal Fermi liquid-FM,FM-unconventional superconductor-FM(FUSF),quantum ring and optical spin-field-effect *** magnetoresistances in those structures,spin accumulation effect in FM-QD-FM and FUSF systems,spin injection and spin filter into semiconductor,spin transfer effect,photon-assisted spin transport,magnonassisted tunneling,electron-electron interaction effect on spin transport,laser-controlled spin dynamics,and thermoelectrical spin transport are discussed.

关键词： spintronics magnetic tunnel junction spin transport magnetoresistance spin transfer torque spin injection spin filter spin-valve spin-orbit

spin Thermoelectric Effects in a Three-Terminal Double-Dot Interferometer

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Communications in Theoretical Physics 2018年第11期69卷 625-632页

作者： Feng Liang Ben-Ling Gao Guang Song Yu Gu Department of Applied Physics Huaiyin Institute of Technology Department of Physics and Siyuan Laboratory Jinan University

We theoretically investigate the thermoelectric properties of a three-terminal double-dot interferometer with Rashba spin-orbit interaction. It is found that with some temperature distributions a thermal spin current can even be produced without the help of magnetic flux and by tuning the spin interference effect in the system, a pure spin or fully spin-polarized current can be driven by temperature differences. For the cases that two of the terminals are held at the same temperature, the charge (spin) thermopower and the charge (spin) figure of merit are defined and calculated in the linear response regime. With some choices of the system parameters the calculated spin and charge thermopowers are of the same order of magnitude and the charge figure of merit can exceed 1.

关键词： thermoelectric effects thermal spin current Rashba spin-orbit interaction,interferometer nonequilibrium Green's function method