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Search Results: 1 - 10 of 28040 matches for " ZhiHao Ma "
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Entanglement criterion based on skew information
Zhihao Ma
Physics , 2009,
Abstract: we can establish an entanglement criteria from skew information. our criterion is independent of Local Uncertainty Relations.
Matrix realignment and partial transpose approach to entangling power of quantum evolutions
Zhihao Ma,Xiaoguang Wang
Physics , 2007, DOI: 10.1103/PhysRevA.75.014304
Abstract: Based on the matrix realignment and partial transpose, we develop an approach to entangling power and operator entanglement of quantum unitary operators. We demonstrate efficiency of the approach by studying several unitary operators on qudits, and indicate that these two matrix rearrangements are not only powerful for studying separability problem of quantum states, but also useful in studying entangling capabilities of quantum operators.
Topologies on Quantum Effects
Zhihao Ma,Sen Zhu
Mathematics , 2008, DOI: 10.1016/S0034-4877(09)90043-X
Abstract: Quantum effects play an important role in quantum measurement theory. The set of all quantum effects can be organized into an algebraical structure called effect algebra. In this paper, we study various topologies on the Hilbert space effect algebra and the projection lattice effect algebra.
A new bound of concurrence
Zhihao Ma,Jing-Ling Chen
Physics , 2010, DOI: 10.1103/PhysRevA.82.034305
Abstract: We give a new bound of concurrence.
A new entanglement measure: D-concurrence
ZhiHao Ma,Xiao-Dong Zhang
Physics , 2009,
Abstract: A new entanglement measure, which is called D-concurrence, is proposed. Then the upper and lower bounds for D-concurrence are obtained and the relationship between D-concurrence and the usual concurrence of Wootters was established. In addition, comparing with the usual concurrence, D-concurrence has some special merits.
Existence and Nonexistence of Global Solutions of a Fully Nonlinear Parabolic Equation  [PDF]
Zhihao Ge
Advances in Pure Mathematics (APM) , 2013, DOI: 10.4236/apm.2013.31004
Abstract: In the paper, we study the global existence of weak solution of the fully nonlinear parabolic problem (1.1)-(1.3) with nonlinear boundary conditions for the situation without strong absorption terms. Also, we consider the blow up of global solution of the problem (1.1)-(1.3) by using the convexity method.
Background Characteristics of Board Secretary and IPO Underpricing  [PDF]
Zhihao Lin
Modern Economy (ME) , 2017, DOI: 10.4236/me.2017.811090
Abstract: The information asymmetry between the internal environment and external environment of enterprises composes one of essential factors leading to IPO underpricing. According to upper echelon theory, background characteristics of senior executives will exert an impact on their behaviors selections as well as the performance of company. The board secretary in China, as the information publisher, can also influence IPO underpricing with his/her personal background. Testing the samples of GEM (The Growth Enterprise Market) in China from the year of 2009 to 2012, the paper concluded that the board secretary with financial background and related working experience can reduce the IPO underpricing, based on which the conclusion has been drawn that the personal background characteristics can influence IPO underpricing and further affect the IPO pricing efficiency, hoping to provide reference for enterprises to recruit the right person for board secretary.
A Brief Discussion on Legal Risks of Beijing Winter Olympics  [PDF]
Zhihao Zhang
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.612024
Abstract: Beijing Winter Olympics organizing committee is the risk subject. Incomplete laws and regulations, contractual risks and operational risks are the sources of legal risks, and legal risk identification, legal risk assessment and legal risk response are risk prevention and control procedures of the legal risks of Beijing Winter Olympics. On a macro level, comprehensive prevention and control in protection of laws and regulations, formulation of emergency plans, personnel training and introduction of professional legal services should be taken in.
Precise Asymptotics of Strictly Stationary \rho-Mixing Sequences
强平稳\rho-混合序列的精确渐近性

ZHAO Yuexu,MA Zhihao,SUN Weiliang,
赵月旭

系统科学与数学 , 2008,
Abstract: The precise asymptotics for partial sums S_{n}=X_{1}+X_{2}+\cdots+X_{n}of strictly stationary \rho-mixing sequences are investigated, and the limit properties and the convergence rate of series \sum\limits_{n=1}^{\infty}\varphi(n)P(|S_{n}|\geq \varepsilon H(n)) as \varepsilon\searrow 0 are given, and hence the relations between functions \varphi(n) and H(n) are revealed.
Geometric interpretation for A-fidelity and its relation with Bures fidelity
Zhihao Ma,Fu-Lin Zhang,Jing-Ling Chen
Physics , 2008, DOI: 10.1103/PhysRevA.78.064305
Abstract: A geometric interpretation for the A-fidelity between two states of a qubit system is presented, which leads to an upper bound of the Bures fidelity. The metrics defined based on the A-fidelity are studied by numerical method. An alternative generalization of the A-fidelity, which has the same geometric picture, to a $N$-state quantum system is also discussed.
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