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	1. Dark state mechanism for long-time transfer of excitation in a donor-acceptor system
	Lu Jing, Zhou Lan, Fu Hong-Chen
	Physics 04 January 2014
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	Abstract:We study the quantum coherence transfer of excitations between a donor-acceptorpair with a fixed distance $d$ apart, mutually interacting with dipolarcoupling. The pair is coupled to a common environment through an exchangeinteraction. By modeling the pair as two two-level system (TLS) and the environmentas many harmonic oscillators, the coherent or incoherent behavior of this pairappears on whether the pair's inter-interaction is stronger orweaker than their coupling to the environment. Taking the linear expansionof the environmental frequency, an analytical solution for the probabilityamplitudes of the pair is obtained which involves all the retardation times.We found that there is a considerable trapping of the energy within the pair for along time due to the strong inhibition of radiative decay of dark states whentwo TLSs are half a resonant wavelength apart.
	TO cite this article:Lu Jing, Zhou Lan, Fu Hong-Chen. Dark state mechanism for long-time transfer of excitation in a donor-acceptor system[OL].[ 4 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4580537


	2. Analytical study on holographic superconductors for Born-Infeld electrodynamics in Gauss-Bonnet black hole with backreactions
	Yao Weiping,Jing Jiliang
	Physics 03 September 2013
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	Abstract: We analytically study the holographic superconductors for Born-Infeld electrodynamics in Gauss-Bonnet gravity with backreactions. We note that the analytic method is still powerful for this complex system and the results obtained by the analytical and numerical computations are consistent. We find that the critical temperature decreases with the increase of the backreactions, Gauss-Bonnet, and Born-Infeld parameters, which means that increase of the strength of these effects will make the scalar hair harder to form. We also show that the critical exponent is not affected by the backreactions, Gauss-Bonnet gravity, and Born-Infeld electrodynamics.
	TO cite this article:Yao Weiping,Jing Jiliang. Analytical study on holographic superconductors for Born-Infeld electrodynamics in Gauss-Bonnet black hole with backreactions[OL].[ 3 September 2013] http://en.paper.edu.cn/en_releasepaper/content/4558063

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	3. 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


	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. 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


	6. 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


	7. Performance evaluation of a micro-/nano-scaled quantum Ericsson Refrigeration cycle
	CHEN Liwei,SU Guozhen,CHEN Jincan
	Physics 25 October 2011
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	Abstract:The performance of a micro-/nano-scaled Ericsson refrigeration cycle using an ideal Fermi gas as the working substance is examined, in which the finite-size of the working substance is taken into account. It is found that finite-size effect always results in the decrease of the coefficient of performance compared with that obtained under the thermodynamic limit condition. The influence of the finite-size effect on the performance characteristics is observable when the refrigeration cycle is operated in the temperature region around the Fermi temperature $T_F$ of the working substance, but negligible when the working temperatures are much lower or higher than $T_F$ . The results obtained here may be helpful for further understanding quantum boundary effect of small systems and provide theoretical guidance for designing a micro-/nano-scaled cycle device.
	TO cite this article:CHEN Liwei,SU Guozhen,CHEN Jincan. Performance evaluation of a micro-/nano-scaled quantum Ericsson Refrigeration cycle[OL].[25 October 2011] http://en.paper.edu.cn/en_releasepaper/content/4447333


	8. performance characteristic and parametric optimization of an irreversible magnetic Ericsson heat pump
	WEI Fang,LIN Guoxing,CHEN Jincan,Ekkes Bruck
	Physics 17 February 2011
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	Abstract:By taking account of finite-rate heat transfer in the heat-transfer processes, heat leak between the two external heat reservoirs, regenerative loss, regeneration time, and internal irreversibility due to dissipation of the cycle working substance, an irreversible magnetic Ericsson heat pump cycle is presented. On the basis of the thermodynamic properties of magnetic materials, the performance characteristics of the irreversible magnetic Ericsson heat pump are investigated and the relationship between the optimal heating load and the coefficient of performance (COP) is derived. Moreover, the maximum heating load and the corresponding COP as well as the maximum COP and the corresponding heating load are obtained. Furthermore, the other optimal performance characteristics are discussed in detail. The results obtained here may provide some new information for the optimal parameter design and the development of real magnetic Ericsson heat pumps.
	TO cite this article:WEI Fang,LIN Guoxing,CHEN Jincan, et al. performance characteristic and parametric optimization of an irreversible magnetic Ericsson heat pump[J].


	9. Performance optimization of irreversible ferromagnetic Stirling heat pump
	WEI Fang,WANG Ruizhe,Gildas Diguet,LIN Guoxing
	Physics 17 February 2011
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	Abstract:An irreversible Stirling heat pump cycle using ferromagnetic materials as a cyclic working substance is established. The influences of finite-rate heat transfer, heat leak, regeneration time, regenerative loss and the internal irreversibility on the cyclic performance of magnetic heat pumps are taken into account. On the basis of the thermodynamic properties of ferromagnetic materials, the performance characteristic of the ferromagnetic Stirling heat pump cycle is investigated. Also, by applying the optimal-control theory, the relation between the optimal heating load and the coefficient of performance (COP) is derived. Furthermore, the maximum heating load and the corresponding COP as well as the maximum COP and the corresponding heating load are determinded and discussed in detail. The results obtained in the present paper may provide some new information for the optimal design and the development of real magnetic heat pumps.
	TO cite this article:WEI Fang,WANG Ruizhe,Gildas Diguet, et al. Performance optimization of irreversible ferromagnetic Stirling heat pump[J].


	10. Bound States and Band Gaps for Spin-0 and Spin-1/2 Particles with Vector and Scalar Woods-Saxon Potentials
	Tian Wenjie
	Physics 26 October 2009
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	Abstract:We analyze the relativistic bound states with mixed vector and scalar Woods-Saxon potentials, for particular under the specific coupling of V(r)=S(r) for s-wave states. As to spin-0 particles, the investigation via Klein-Gordon equation(KGE) indicates that besides the bound states and scattering states, an extra band gap with vanishing wave function arises. For the bound states, KGE is transformed into a hypergeometric equation with standard composition of the parameters, and on the analytic intervals of the extended argument R we obtain the solution via Gaussian series. The practical argument (0,1) and the Kummer solution at the regular singular point x=0, together with the boundary constraints, give rise to the s-wave discrete spectrum, analytically and explicitly. For the band gap, we prove its existence and investigate the properties. For this very energy interval, KGE differs slightly with that of the bound states after the same transformation, and could only be solved via series expansion, which shows that the wave function vanishes completely. This way, we obtain the structure of the bound state and band gap, the analytic wave function and the explicit energy spectrum for spin-0 particles. As to spin-1/2 particles, we apply Dirac equation(DE) based on the complete set [H,k,J2,J_z]. Under the specific coupling manner, the s-wave bound states lead to the identical radial DE with that of KGE, which yields the solution for the up component immediately, and subsequently induces the down component. These draw a clear picture of the behaviors of the spin-1/2 particles under such conditions.
	TO cite this article:Tian Wenjie. Bound States and Band Gaps for Spin-0 and Spin-1/2 Particles with Vector and Scalar Woods-Saxon Potentials[OL].[26 October 2009] http://en.paper.edu.cn/en_releasepaper/content/36135

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