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Two-Mode Excited Squeezed Vacuum State and Its Properties

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Communications in Theoretical Physics 2008年第5期49卷 1299-1304页

作者： MENG Xiang-Guo wang Ji-suo LIANG Bao-Long Department of Physics Liaocheng University Liaocheng 252059 China

In this paper, the two-mode excited squeezed vacuum state （TESVS） is studied by using the statistical method. By calculating the normalization of the TESVS, a new form of Jacobi polynomials and some new identities are obtained. The photon number distribution of the TESVS is given and it is a simple form of Jacobi polynomials. Using the entangled state representation of Wigner operator, the Wigner function of the TESVS is obtainded and the variations of the Wigner function with the parameters m, n, and r are discussed. Here from the phase space point of view the TESVS can be well interpreted and described.

关键词： two-mode excited squeezed vacuum state photon number distribution Wigner function entangled state representation

A structural comparison of measurement-based admission control algorithms

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The Journal of China Universities of Posts and Telecommunications 2006年第3期13卷 81-86页

作者： GU Yi-ran wang suo-ping WU Hai-ya The College of Automation Nanjing University of Posts and TelecommunicationsNanjing 210003 China Ningbo Branch Co. Zhejiang Telecommunication Co. Ltd. Zhejiang ProvinceNingbo 315000 China

Measurement-based admission control （MBAC） algorithm is designed for the relaxed real-time service. In contrast to traditional connection admission control mechanisms, the most attractive feature of MBAC algorithm is that it does not require a prior traffic model and that is very difficult for the user to come up with a tight traffic model before establishing a flow. Other advantages of MBAC include that it can achieve higher network utilization and offer quality service to users. In this article, the study of the equations in the MBAC shows that they can all be expressed in the same form. Based on the same form, some MBAC algorithms can achieve same performance only if they satisfy some conditions.

关键词： connection admission control MBAC measurement process

Normalized Excited Squeezed Vacuum State and Its Applications

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Communications in Theoretical Physics 2007年第5期47卷 927-932页

作者： MENG Xiang-Guo wang Ji-suo LIANG Bao-Long Department of Physics Liaocheng University Liaocheng 252059 China

By using the intermediate coordinate-momentum representation in quantum optics and generating function for the normalization of the excited squeezed vacuum state （ESVS）, the normalized ESVS is obtained. We find that its normalization constants obtained via two new methods are uniform and a new form which is different from the result obtained by Zhang and Fan [Phys. Lett. A 165 （1992） 14]. By virtue of the normalization constant of the ESVS and the intermediate coordinate-momentum representation, the tomogram of the normalized ESVS and some useful formulae are derived.

关键词： ESVS technique of integration within an ordered product of operators intermediate coordinate- momentum representation generating function

Husimi Functions of Excited Squeezed Vacuum States

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Communications in Theoretical Physics 2009年第9期52卷 487-492页

作者： MENG Xiang-Guo wang Ji-suo LIANG Bao-Long Department of Physics Liaocheng University Liaocheng 252059 China

Based on the Husimi operator in pure state form introduced by Fan et al,which is a squeezed coherentstate projector,and the technique of integration within an ordered product (IWOP) of operators,as well as the entangledstate representations,we obtain the Husimi functions of the excited squeezed vacuum states (ESVS) and two marginaldistributions of the Husimi functions of the ESVS.

关键词： excited squeezed vacuum state IWOP technique entangled state representation Husimi operator Husimi function marginal distribution

Wigner Function and Phase Probability Distribution of q-Analogue of Squeezed One-Photon State

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Communications in Theoretical Physics 2008年第6期49卷 1457-1460页

作者： MENG Xiang-Guo wang Ji-suo LIANG Bao-Long Department of Physics Liaocheng University Liaocheng 252059 China

In this paper, in terms of the technique of integration within an ordered product （IWOP） of operators and the properties of the inverses of q-deformed annihilation and creation operators, normalizable q-analogue of the squeezed one-photon state, which is quite different from one introduced by Song and Fan [Int. 3. Theor. Phys. 41 （2002） 695], is constructed. Moreover, the Wigner function and phase probability distribution of q-analogue of the squeezed one-photon state are examined.

关键词： q-analogue of the squeezed one-photon state IWOP technique Wigner function phase probability distribution

Entangled States in a Single-Qubit Structure with SQUID Coupled with a Super-conducting Resonator

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Communications in Theoretical Physics 2008年第1期49卷 88-92页

作者： LIANG Bao-Long wang Ji-suo MENG Xiang-Guo School of Physical Science and Information Engineering Liaocheng University Liaocheng 252059 China

In this paper, the number-phase quantization scheme of the mesoscopic circuit, which consists of a singlequbit structure with superconducting quantum interference device coupled with a super-conducting resonator, is given. By introducing a unitary matrix and by means of spectral decomposition, the Hamiltonian operator of the system is exactly formulated in compact forms in spin-l/2 notation. The eigenvalues and the eigenstates of the system are investigated. It is found that using this system the entangled states can not only be prepared, but also be manipulated by tuning the magnetic flux through the super-conducting loop.

关键词： single-qubit super-conducting resonator quantization spectral decomposition entangled state

昆都仑泄洪冲沙洞结构静动力三维有限元配筋计算

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水利水电技术（中英文） 2024年第S1期55卷 39-43页

作者：艾喆王锁章莉张铸何勇军李宏恩河海大学水利水电学院江苏南京210098 包头市水库管护中心内蒙古包头014017 南京水利科学研究院江苏南京210029

昆都仑水库是一座以防洪、供水为主的综合利用的中型水库。为改善水库泄洪条件,新建泄洪冲沙洞并布置于库区右岸山体内。首先,构建了泄洪冲沙洞三维有限元模型,模拟了各结构的精细构造部位;然后,采用三维线性有限单元法对泄洪冲沙洞开... 详细信息

昆都仑水库是一座以防洪、供水为主的综合利用的中型水库。为改善水库泄洪条件,新建泄洪冲沙洞并布置于库区右岸山体内。首先,构建了泄洪冲沙洞三维有限元模型,模拟了各结构的精细构造部位;然后,采用三维线性有限单元法对泄洪冲沙洞开展静动力工况下变形、应力分析计算,基于有限元内力法进行内力计算并提出相应配筋方案;最后,进行结构限裂复核验算。选取的配筋计算方案实用可靠,为工程设计提供指导、验证复核作用并成功付诸实施。

关键词：泄洪冲沙洞三维线性有限元配筋计算应力图形法

Quantum Tunneling of a Dipolar Bose-Einstein Condensate in Optical Lattice

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Communications in Theoretical Physics 2008年第1期49卷 123-125页

作者： YU Zhao-Xian JIAO Zhi-Yong wang Ji-suo Department of Physics Beijing Information Science and Technology University Beijing 100101 China Department of Physics China University of Petroleum （East China） Dongying 257061 China Department of Physics Liaocheng University Liaocheng 252059 China

We study quantum tunneling of a dipolar Bose-Einstein condensate in optical lattice when the spin system initially is prepared in a squeezed coherent state. It is found that there exists quantum tunneling between lattices l and l ＋ 1, l and l - 1, respectively. In particular, when the optical lattice is infinitely long and the spin excitations are in the long-wavelength limit, quantum tunneling disappears between lattices l and l ＋ 1, and that l and l - 1. Correspondingly, the magnetic soliton appears.

关键词： dipolar Bose Einstein condensate quantum tunneling

Interference of Two-Component Bose-Einstein Condensates with a Coupling Drive in Presence of Dissipation

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Communications in Theoretical Physics 2005年第3X期44卷 532-536页

作者： YU Zhao-Xian wang Ji-suo JIAO Zhi-Yong Beijing Information Technology Institute Beijing 100101 China Department of Physics Liaocheng University Liaocheng 252059 China Department of Applied Physics University of Petroleum (East China) Dongying 257061 China

The interference of the two-component Bose-Einstein condensates with a coupling drive in the presence of the dissipation is studied. We find that when the two-component Bose-Einstein condensates are initially in the coherent states, for the smaller dissipation parameters compared with that of the rf frequency ωrf, the interference intensity exhibits damply oscillation behavior, whereas when the dissipation parameters are larger than that of the ωry, the interference intensity exhibits a fast attenuation behavior. As a comparison, the interference intensity in the absence of the dissipation is also studied. We conclude that the dissipation of the system can be evaluated by selecting the ωrf experimentally.

关键词： interference dissipation two-component Bose-Einstein condensates