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Ground States of Ultracold Spin-1 Atoms in a Deep Double-Well optical superlattice in a Weak Magnetic Field

Communications in Theoretical Physics 2013年第4期59卷 417-424页

作者：郑公平秦帅锋王守阳简闻天 Department of Physics Henan Normal University

The ground states of the ultracold spin-1 atoms superlattice in a weak magnetic field are obtained. It is shown trapped in a deep one-dimensional double-weU optical that the ground-state diagrams of the reduced double- well model are remarkably different for the antiferromagnetic and ferromagnetic condensates. The transition between the singlet state and nematic state is observed for the antiferromagnetic interaction atoms, which can be realized by modulating the tunneling parameter or the quadratic Zeeman energy. An experiment to distinguish the different spin states is suggested.

关键词： ground state ultracold atoms optical superlattice weak magnetic field

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Isolated structures in two-dimensional optical superlattice

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Frontiers of physics 2017年第5期12卷 135-141页

作者： Xin-Hao Zou Bao-Guo Yang Xia Xu Peng-Ju Tang Xiao-Ji Zhou School of Electronics Engineering & Computer Science Peking University Beijing 100871 China

Overlaying commensurate optical lattices with various configurations called superlattices can lead to exotic lattice topologies and, in turn, a discovery of novel physics. In this study, by overlapping the maxima of lattices, a new isolated structure is created, while the interference of minima can generate various ＂sublattice＂ patterns. Three different kinds of primitive lattices are used to demonstrate isolated square, triangular, and hexagonal ＂sublattice＂ structures in a two-dimensional optical superlattice, the patterns of which can be manipulated dynamically by tuning the polarization, frequency, and intensity of laser beams. In addition, we propose the method of altering the relative phase to adjust the tunneling amplitudes in ＂sublattices＇. Our configurations provide unique opportunities to study particle entanglement in ＂lattices＂ formed by intersecting wells and to implement special quantum logic gates in exotic lattice geometries.

关键词： optical superlattice isolated structures exotic lattice geometries quantum logic gates

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optical and fast nondestructive identification of the ages of leaded ancient pottery

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Chinese Physics B 2012年第5期21卷 641-646页

作者：吴方媛杨湘波 MOE Key Laboratory of Laser Life Science&Institute of Laser Life Science College of BiophotonicsSouth China Normal University School of Physical Education&Sports Science South China Normal University

In this paper,based on the one-dimensional（1D） optical superlattice model,we calculate the average reflectivities（ARs） of leaded ancient pottery（AP） made within the last 2000 years,and find that for incident light with a suitable wavelength,the AR of the leaded AP increases monotonously with the increase in the layer number of the silvery glaze（SG） *** on this property,we propose an optical nondestructive method for identifying the age of leaded AP by detecting the *** using the exhaust algorithm and the discriminant function of variance,we obtain the optimal wavelength range of the incident light to identify the ages of the leaded *** is found that in the visible light band,if we choose green light with a wavelength range of 540-540.1 nm as the incident light,leaded AP made within the last 2000 years can be identified swiftly and precisely by detecting the *** will be useful for designing optical instruments for the fast nondestructive identification of the ages of leaded AP.

关键词： optical superlattice ancient pottery nondestructive identification

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Generation of tripartite Einstein-Podolsky-Rosen steering by cascaded nonlinear process

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Chinese Physics B 2020年第5期29卷 74-79页

作者： Yu Liu Su-Ling Liang Guang-Ri Jin You-Bin Yu Jian-Yu Lan Xiao-Bin He Kang-Xian Guo Key Laboratory of optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhou 310018China Shanghai Institute of Space Power Sources Shanghai Academy of Spaceflight TechnologyShanghai 200245China School of Physics and Electronic Engineering Guangzhou UniversityGuangzhou 510006China

A scheme is proposed to generate genuine tripartite Einstein-Podolsky-Rosen(EPR)steering in cascaded nonlinear process of the fourth-harmonic *** second-harmonic is generated by the first double-frequency process in an optical ***,the fourth-harmonic is produced by the second cascaded double-frequency process through quasi-phase-matching technique in the same optical *** genuine tripartite EPR steering among the pump,the second-harmonic,and the fourth-harmonic beams can be obtained by this cascaded nonlinear process according to a criterion for genuine multipartite quantum *** quantum steering properties are discussed by adjusting the parameters related to the cascaded nonlinear *** present research provides a reference scheme and data for obtaining good multipartite EPR steering in experiment and can advance the applications of quantum steering in the quantum information processing.

关键词： quantum steering harmonic generation quasi-phase-matching optical superlattice

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