Abstract:We study, in the framework of open quantum systems, the dynamics of quantum entanglement and quantum discord of two mutually independent circularly accelerated two-level atomsin interaction with a bath of fluctuating massless scalar fields in the Minkowski vacuum. We assume that the two atoms rotate synchronically with their separation perpendicular to the rotating plane. The time evolution of the quantum entanglement and quantum discord of the two-atom system is investigated. For a maximally entangled initial state, the entanglement measured by concurrence diminishes to zero within a finite time, while the quantum discord can either decrease monotonically to an asymptotic value or diminish to zero at first and then followed by a revival depending on whether the initial state is antisymmetric or symmetric. When both of the two atoms are initially excited, the generation of quantum entanglement shows a delayed feature, while quantum discord is created immediately. Remarkably, the quantum discord for such a circularly accelerated two-atom system takes a nonvanishing value in the steady state, and this is distinct from what happens in both the linear acceleration case and the case of static atoms immersed in a thermal bath.

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	1. Steady state quantum discord for circularly accelerated atoms
	HU Jia-Wei,YU Hong-Wei
	Physics 09 October 2015
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	Abstract:We study, in the framework of open quantum systems, the dynamics of quantum entanglement and quantum discord of two mutually independent circularly accelerated two-level atomsin interaction with a bath of fluctuating massless scalar fields in the Minkowski vacuum. We assume that the two atoms rotate synchronically with their separation perpendicular to the rotating plane. The time evolution of the quantum entanglement and quantum discord of the two-atom system is investigated. For a maximally entangled initial state, the entanglement measured by concurrence diminishes to zero within a finite time, while the quantum discord can either decrease monotonically to an asymptotic value or diminish to zero at first and then followed by a revival depending on whether the initial state is antisymmetric or symmetric. When both of the two atoms are initially excited, the generation of quantum entanglement shows a delayed feature, while quantum discord is created immediately. Remarkably, the quantum discord for such a circularly accelerated two-atom system takes a nonvanishing value in the steady state, and this is distinct from what happens in both the linear acceleration case and the case of static atoms immersed in a thermal bath.
	TO cite this article:HU Jia-Wei,YU Hong-Wei. Steady state quantum discord for circularly accelerated atoms[OL].[ 9 October 2015] http://en.paper.edu.cn/en_releasepaper/content/4656649


	2. First Order Form of Schrödinger Equation
	LI Anyong
	Physics 21 May 2015
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	Abstract:Based on the algebra of matrices we propose a general first order equation in three- dimension which can deduce the Schrödinger equation. The corresponding time-independent equation is also proposed for a general potential. Several constant potential problems including potential step problem and potential well problem are treated using this first-order equation, we obtain the non- relativistic quantum mechanical results of the Schrödinger equation. Moreover, for the finite potential well problem, the first-order relativistic correction of the energy is also obtained.
	TO cite this article:LI Anyong. First Order Form of Schrödinger Equation[OL].[21 May 2015] http://en.paper.edu.cn/en_releasepaper/content/4644614

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	3. Phase transition and Thermodynamical geometry of Reissner-Nordstr
	Zhang Jia-Lin,Cai Rong-Gen,Yu Hong-Wei
	Physics 20 January 2015
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	Abstract:We study the thermodynamics and thermodynamic geometry of a five-dimensional Reissner-Nordstr"om-AdS black hole in the extended phase spaceby treating the cosmological constant as being related to the number of colors in theboundary gauge theory and its conjugate quantity as the associatedchemical potential. It is found that the contribution of the chargeof the black hole to the chemical potential is always positive and theexistence of charge make the chemical potential become positive moreeasily. We calculate the scalar curvatures of the thermodynamicalWeinhold metric, Ruppeiner metric and Quevedo metric, respectively,in the fixed N^2 case and the fixed q case. It is foundthat in the fixed N^2 case the divergence of the scalar curvatureis related to the divergence of the specific heat with fixed electricpotential in the Weinhold metric and Ruppeiner metric, and thedivergence of the scalar curvature in the Quevedo metric corresponds tothe divergence of the specific heat with fixed electric charge density. In the fixed q case, however, the divergence of the scalarcurvature is related to the divergence of the specific heat with fixedchemical potential in the Weinhold metric and Ruppeiner metric,while in the Quevedo metric the divergence of the scalar curvature corresponds to the divergence of the specific heat with fixed number ofcolors and the vanishing of the specific heat with fixed chemicalpotential.
	TO cite this article:Zhang Jia-Lin,Cai Rong-Gen,Yu Hong-Wei. Phase transition and Thermodynamical geometry of Reissner-Nordstr[OL].[20 January 2015] http://en.paper.edu.cn/en_releasepaper/content/4629708


	4. Hybrid magic state distillation for universal fault-tolerant quantum computation
	ZHENG Wenqiang, YU Yafei, PAN Jian,ZHANG Jingfu,LI Jun,LI Zhaokai,Dieter Suter,ZHOU Xianyi,PENG Xinhua,DU Jiangfeng
	Physics 17 September 2014
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	Abstract:A set of stabilizer operations augmented by some special initialstates known as ``magic states", gives the possibility of universalfault-tolerant quantum computation. However, magic state preparationinevitably involves fault-untolerant operations that introducenoise. The most common method to eliminate the noise ismagic state distillation (MSD) by stabilizer operations. Here wepropose a hybrid MSD protocol by connecting a four-qubit $H$-typeMSD with a five-qubit $T$-type MSD to overcome the disadvantages ofthe previous MSD protocols. The hybrid MSD protocol furtherintegrates distillable ranges of different exisiting MSD protocols,and provides considerable improvement in qubit resource consumptionfor almost all of the distillable region. Moreover, weexperimentally demonstrate the four-qubit $H$-type MSD protocolusing nuclear magnetic resonance technology.
	TO cite this article:ZHENG Wenqiang, YU Yafei, PAN Jian, et al. Hybrid magic state distillation for universal fault-tolerant quantum computation[OL].[17 September 2014] http://en.paper.edu.cn/en_releasepaper/content/4610404


	5. Quantum simulation of interaction blockade in atomic Bose-Josephson system with solid quadrupolar crystal
	NIE Xinfang, LI Jun, CUI Jiangyu, LUO Zhihuang, HUANG Jiahao, CHEN　Hongwei, LEE Chaohong, PENG Xinhua, DU Jiangfeng
	Physics 05 September 2014
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	Abstract:Bose-Josephson system (BJS) provides an excellent platform for exploring and exploiting exotic quantum coherence,where interaction blockade is an important fundamental phenomenon in BJS.Using the analogy of the atomic BJS and the quadrupolar nuclear magnetic resonance (NMR) crystal, we experimentally simulate the atomic BJS in a NMR quantum simulator composing of the quadrupolar spin-$3/2$ sodium nuclei of a NaNO$_3$ single crystal, and observe the interesting phenomenon of interaction blockade by adiabatically changing the asymmetry parameter in an atomic BJS.This is the first experimental implementation of adiabatic quantum simulation using quadrupolar nuclear system as far as we know.Our work exhibits important applications of quadrupolar NMR in the quantum information science.
	TO cite this article:NIE Xinfang, LI Jun, CUI Jiangyu, et al. Quantum simulation of interaction blockade in atomic Bose-Josephson system with solid quadrupolar crystal[OL].[ 5 September 2014] http://en.paper.edu.cn/en_releasepaper/content/4607891


	6. Solve the recurrence relations for the Spin-weighted Spheroidal Function by SUSYQM
	Wang Huihui,TIAN Guihua
	Physics 09 May 2014
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	Abstract:In this paper we get the recurrence relations of the spin-weighted spheroidal function through solving spin-weighted spheroidal wave equations with super-symmetric quantum mechanics (SUSYQM). We use the shape invariance property to obtain the relation of same parameter but different for them. Our consequences reduce to the famous recurrence relations of spin-weighted spherical harmonics, which in turn affirm our study. These content are the first investigation concerning the spin-weighted spheroidal function and very important in theoretical background.
	TO cite this article:Wang Huihui,TIAN Guihua. Solve the recurrence relations for the Spin-weighted Spheroidal Function by SUSYQM[OL].[ 9 May 2014] http://en.paper.edu.cn/en_releasepaper/content/4596231


	7. Azimuthal distribution of mean transverse rapidity in relativistic heavy ion collisions
	Yang Peng,Li Lin,Wu Yuanfang
	Physics 24 April 2014
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	Abstract:By the sample generated by the AMPT with string melting model, we compare the azimuthal distributions of multiplicity, total transverse rapidity, and mean transverse rapidity. It is demonstrated that the azimuthal distribution of mean transverse rapidity is a good probe of the radial kinetic expansion. The anisotropic part of the distribution characterizes the anisotropic nature of the radial expansion, and isotropic part is combinations of thermal motion and isotropic radial expansion.
	TO cite this article:Yang Peng,Li Lin,Wu Yuanfang. Azimuthal distribution of mean transverse rapidity in relativistic heavy ion collisions[OL].[24 April 2014] http://en.paper.edu.cn/en_releasepaper/content/4594284


	8. Dynamics of controllable rogue waves in a generalized nonautonomous Kundu-Eckhaus equation
	Ma Xiaoxiao ,Zhao Lichen ,Liu Chong ,Yang Zhanying ,Yang Wenli
	Physics 21 March 2014
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	Abstract:We analytically study rogue waves in a generalized nonautonomous Kundu-Eckhaus equation. Dynamics of the rogue waves are investigated through the precise expressions of their peak, valley, trajectory, and width. Based on this, the properties of a few specific rogue waves are demonstrated in detail, and the dynamical evolution of rogue waves can be well controlled under different nonlinearity management.It shows that the peak reaches its maximum and the valley becomes minimized when the width evolves to the minimum value. Moreover, we find that the higher-order effects here achieve balance due to the integrability, and they only influence the rogue waves' trajectory.
	TO cite this article:Ma Xiaoxiao ,Zhao Lichen ,Liu Chong , et al. Dynamics of controllable rogue waves in a generalized nonautonomous Kundu-Eckhaus equation[OL].[21 March 2014] http://en.paper.edu.cn/en_releasepaper/content/4590851


	9. Infinite-disorder Critical Point of Dilute Quantum Transverse Ising Model on a Small World Network
	Xiang-Mu Kong,Jia-Xue Liu
	Physics 21 January 2014
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	Abstract:We investigate the effects of the topology of the small world networks on the infinite disorder critical point of the dilute quantum transverse Ising spin system. The certain quantum phase transition of the system is dominated by the classical percolation transition on the small world networks. The results show that there are power law Griffiths singularities which are independent of the concentration of the random connected bonds away from the critical point and the strength of the Griffiths singularities on both sides of the infinite disorder critical point has no difference. The critical exponents on the infinite disorder critical point of the system are obtained and it is found that they are independent of the random connected bonds concentration in the small world networks.
	TO cite this article:Xiang-Mu Kong,Jia-Xue Liu. Infinite-disorder Critical Point of Dilute Quantum Transverse Ising Model on a Small World Network[OL].[21 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4583461


	10. Relativistic ideal Bose gas in Harmonic traps
	Xiang-Mu Kong,Ying Wang
	Physics 21 January 2014
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	Abstract:Using semiclassical approximation method, Bose-Einstein condensation (BEC) of a relativistic ideal boson gas (RIBG) with and without antibosons in three-dimensional (3-D) harmonic traps is investigated. The BEC transition temperature Tc ?and the Helmholtz free energy at Tc ?are calculated. The effect of the rest mass of the boson on the properties of the system is also studied. We find that Tc ?of RIBG is higher than that of the nonrelativistic approximation. The RIBG with antibosons is also investigated and it is found that the Helmholtz free energy of the system with antibosons at Tc ?is lower than that of the system without antibosons. It implies that the system with antibosons is more stable.
	TO cite this article:Xiang-Mu Kong,Ying Wang. Relativistic ideal Bose gas in Harmonic traps[OL].[21 January 2014] http://en.paper.edu.cn/en_releasepaper/content/4583458

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