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	1. Geometric phase of two-level atoms and thermal nature of de Sitter spacetime
	Tian Zehua,Jing Jiliang
	Physics 02 September 2013
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	Abstract:In the framework of open quantum systems, we study the geometric phase acquired by freely falling and static two-level atoms interacting with quantized conformally coupled massless scalar fields in de Sitter-invariant vacuum. We find that, for the freely falling atom, the geometric phase gets a correction resulting from a thermal bath with the Gibbons-Hawking temperature, thus it clearly reveals the intrinsic thermal nature of de Sitter spacetime from a different physical context. For the static atom, there is a correction to the geometric phase coming from both the intrinsic thermal nature of de Sitter spacetime and the Unruh effect associated with the proper acceleration of the atom. Furthermore, in a gedanken experiment, we estimate the magnitude of the correction to the geometric phase as opposed to that in a flat spacetime. We find that the correction for the freely falling atom is too tiny to be measured, and that for the static atom achieves an observable magnitude only when the atom almost locates at the horizon.
	TO cite this article:Tian Zehua,Jing Jiliang. Geometric phase of two-level atoms and thermal nature of de Sitter spacetime[OL].[ 2 September 2013] http://en.paper.edu.cn/en_releasepaper/content/4558086


	2. Computation of growth rates of random sequences with multi-step memory
	Zhang Chenfei ,Lan Yueheng
	Physics 29 January 2013
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	Abstract:We extend the generating functionapproach to the computation of growth rate of random Fibonaccisequences with long memory. Functional iteration equations areobtained and its general form is conjectured, based on which anasymptotic representation of the growth rate is obtained. Thevalidity of both the derived and the conjectured formula areverified upon comparison with Monte Carlo simulation. A numericalscheme of the functional iteration is designed and implemented successfully.
	TO cite this article:Zhang Chenfei ,Lan Yueheng . Computation of growth rates of random sequences with multi-step memory[OL].[29 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4517564

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	3. Hybrid entanglement concentration using quantum-dot and microcavity coupled system
	Wang Chuan,CAO Cong,HE Lingyan,ZHANG Ru
	Physics 22 January 2013
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	Abstract:We propose a hybrid entanglement concentration protocol based onquantum dots (QDs) and optical microcavity coupled systems. Thesystem is used for photon and electron hybrid entanglementgeneration. Also the proposed system can be used for parity checkwhich allows a quantum nondemolition measurement on the spin parity.By performing parity check process on electrons, the entangled statecan be concentrated into maximally entangled state efficiently.
	TO cite this article:Wang Chuan,CAO Cong,HE Lingyan, et al. Hybrid entanglement concentration using quantum-dot and microcavity coupled system[OL].[22 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4517194


	4. Universality of flux-fluctuation law in complex dynamical systems
	Zhou Zhao,Huang Zigang ,Huang Liang,Lai Yingcheng,Lei Yang,Xue Desheng
	Physics 04 January 2013
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	Abstract:Recent work has revealed a law governing flux fluctuation and theaverage flux in complex dynamical systems.The universalityof this flux-fluctuation law can be established through the following steps: (1) the law could bederived in a more general setting, showing that itdepends on a single parameter characterizing the externaldriving, (2)extensive numerical computations are conductedusing distinct external driving, different network topologies,and multiple traffic routing strategies, and (3)data from an actual vehicle traffic system in a major city in China is also analyzed by us to lend more credence for the universality of the flux-fluctuationlaw. Besides its fundamental importance in complex systems,the flux-fluctuation law can be used to infer certain intrinsicproperty of the system for potential applications such as control ofcomplex systems for improved performance.
	TO cite this article:Zhou Zhao,Huang Zigang ,Huang Liang, et al. Universality of flux-fluctuation law in complex dynamical systems[OL].[ 4 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4511847


	5. Pinning improves resource allocation efficiency of boolean-game systems
	Zhang Jiqiang ,Huang Zigang ,Dong JiaqI ,Huang Liang,Huang Tieqiao,Lai Yingcheng
	Physics 04 January 2013
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	Abstract:Resource allocation takes place in various kinds of real-worldcomplex systems, such as the traffic systems (e.g., urban trafficsystem and flight systems), social services institutions ororganizations (e.g., bank, theater, and mart, financial market),or even the ecosystems. Resources are always limited, and agentstend to choose the least used resource based on certain availableinformation, obeying the fundamental principle that theemph{minority wins}. In these systems, herd behavior is harmfulfor the efficiency of resource allocation. However, it isubiquitous in real cases, and present to be congestion in trafficsystem, extreme events in financial system, and other crisis insocial system, all of which are commonly characterized by the lowefficiency of resource allocation. For the sake of preventing herdbehavior and improving the efficiency,it is proposed thatpinning scheme to fix certain individuals' options, and itsystematically is studied that the effect of emph{pinning} to the resourceallocation dynamics of boolean game systems. The work demonstratesthat, the sacrifice of certain individuals' options may markedlyimprove the efficiency of the whole system. Especially, in certaincases, the system performs better than the random game systemthrough self-organized processes. We develop an analytic theorybased on the discrete time master equation to understand theeffect of pinning. The rule to design effective pinning scheme arealso discussed. The work represents a basic and generalmathematical framework to address the fluctuation of the resourceallocation in social, economical and political systems.
	TO cite this article:Zhang Jiqiang ,Huang Zigang ,Dong JiaqI , et al. Pinning improves resource allocation efficiency of boolean-game systems[OL].[ 4 January 2013] http://en.paper.edu.cn/en_releasepaper/content/4511850


	6. Area spectrum and entropy spectrum of Schwarzschild black hole inspired by noncommutative geometry
	Wei Shaowen,Liu Yuxiao,Zhao Zhenhua,Fu Chun-e
	Physics 18 October 2012
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	Abstract:It is known that, in the noncommutative Schwarzschild black hole spacetime, the point-like object is replaced by the smeared object, whose mass density is described by a Gaussian distribution of minimal width √￣θ with θ the noncommutative parameter. In this paper, the area spectrum and entropy spectrum for the noncommutative Schwarzschild black hole with 0≤θ≤（M/1.90412)2 are investigated. By the use of the new physical interpretation of the quasinormal modes of black holes presented by Maggiore, we obtain the quantized area spectrum and entropy spectrum with the modified Hod's and Kunstatter's methods, respectively. The results show that: (1) The area spectrum and entropy spectrum are discrete. (2) The spectrum spacings are dependent on the parameter M/√￣θ. (3) The spacing of the area spectrum of the noncommutative Schwarzschild black hole is smaller than that of the conventional one. So does the spacing of the entropy spectrum. (4) The spectra from the two methods are consistent with each other.
	TO cite this article:Wei Shaowen,Liu Yuxiao,Zhao Zhenhua, et al. Area spectrum and entropy spectrum of Schwarzschild black hole inspired by noncommutative geometry[OL].[18 October 2012] http://en.paper.edu.cn/en_releasepaper/content/4491625


	7. LPP elementary operator criterion of full separability for statesin multipartite quantum systems
	YAN Si-Qing,HOU Jin-Chuan
	Physics 19 September 2012
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	Abstract:Let H1,H2,...,Hn,K (n≥2) be complex Hilbert spacesof finite or infinite dimension. A necessary and sufficientcriterion of full separability for multipartite states isestablished which says that a state ρ on H1×H2×...×Hn×K is fully separable if andonly if (∧×Id) ρ≥0 for all (finite rank)elementary operators ∧ from B(H1,H2,...,Hn) into B(K). Furthermore, acharacterization of LPP elementary operators and a method ofconstructing LPP elementary operators by positive elementary isgive. A new example is also presented to demonstrate how to applythe criterion to detect entanglement of tripartite states.
	TO cite this article:YAN Si-Qing,HOU Jin-Chuan. LPP elementary operator criterion of full separability for statesin multipartite quantum systems[OL].[19 September 2012] http://en.paper.edu.cn/en_releasepaper/content/4490003


	8. Entanglement detection beyond the CCNR criterion for infinite-dimensions
	Guo Yu,Hou Jinchuan
	Physics 19 September 2012
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	Abstract:In terms of the relation betweenthe state and its reduced states as well as its realignment, two inequalities are establishedwhich are valid for all separable states in infinite-dimensional bipartitequantum systems. One of themprovides an entanglement criterion which is strictly stronger thanthe computable cross-norm or realignment (CCNR) criterion.
	TO cite this article:Guo Yu,Hou Jinchuan. Entanglement detection beyond the CCNR criterion for infinite-dimensions[OL].[19 September 2012] http://en.paper.edu.cn/en_releasepaper/content/4490000


	9. Ultracold finite-size Fermi gas in a quartic trap
	CHEN Liwei,SU Guozhen,CHEN Jincan
	Physics 12 September 2012
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	Abstract:Low temperature properties of a finite-size ideal Fermi gas trapped in a quartic potential are studied. The curves of the chemical potential and specific heat varying with the particle number and temperature are plotted. The results obtained here are based on the numerical calculation of the state sum without invoking the Thomas-Fermi approximation, so that the more detailed dependences of the chemical potential and specific heat on the particle number and temperature are revealed.
	TO cite this article:CHEN Liwei,SU Guozhen,CHEN Jincan. Ultracold finite-size Fermi gas in a quartic trap[OL].[12 September 2012] http://en.paper.edu.cn/en_releasepaper/content/4489343


	10. Rotating non-Kerr black hole and energy extraction
	Liu Changqing,Chen Songbai,Jing Jiliang
	Physics 20 April 2012
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	Abstract: The properties of the ergosphere region and theenergy extraction by Penrose process in a rotating non-Kerr blackhole are investigated. It is shown that the ergosphere region issensitive to the deformation parameter ε and the relativeshape of the ergosphere becomes thick with increase of the parameter ε. It is of interest to note that, comparing with the Kerrblack hole, the deformation parameter ε enhances themaximum efficiency of the energy extraction process. Especially, forthe case of a>M, the non-Kerr metric describes a superspinningcompact object and the maximum efficiency can exceed 60%, whileit is only 20.7% for the extremal Kerr black hole.
	TO cite this article:Liu Changqing,Chen Songbai,Jing Jiliang. Rotating non-Kerr black hole and energy extraction[OL].[20 April 2012] http://en.paper.edu.cn/en_releasepaper/content/4475036

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