We have investigated the quasinormal modes (QNMs) of phantom scalar perturbation in a Reissner-Nordstrm (RN) background.We find that the dependence of QNMs on the mass of the field for the phantom perturbation is to...We have investigated the quasinormal modes (QNMs) of phantom scalar perturbation in a Reissner-Nordstrm (RN) background.We find that the dependence of QNMs on the mass of the field for the phantom perturbation is totally different from that of usual massive perturbation.However,we obtain the same critical value of the overtone number for an angular quantum number from which the mass will begin to have a reverse effect on the real part of QNM frequencies and the perturbation-independent relation between the QNMs and the second order thermodynamic phase transition.展开更多
Ey means of conformal Held theory,we have related the degrees of freedom of microstates to the entropy of three-dimensional charged black hole as well as the entanglement entropy of three-dimensional De Sitter spaceti...Ey means of conformal Held theory,we have related the degrees of freedom of microstates to the entropy of three-dimensional charged black hole as well as the entanglement entropy of three-dimensional De Sitter spacetime,We have shown that the degrees of freedom of the conformal theory responsible for the entropy represent states on the horizon and localized in physical spacetime.展开更多
The strange hadronic matter with nucleon,Λ-hyperon andΞ-hyperon is studied by using a chiral symmetry model in a mean-field approximation.The saturation properties and stabilities of the strange hadronic matter are ...The strange hadronic matter with nucleon,Λ-hyperon andΞ-hyperon is studied by using a chiral symmetry model in a mean-field approximation.The saturation properties and stabilities of the strange hadronic matter are discussed.The result indicates a quite large strangeness fraction(fs)region where the strange hadronic matter is stable against particle emission.In the large fs region,theΞcomponent dominates,resulting in a deep minimum in the curve of the binding energy per baryon EB versus the strangeness fraction fs with(EB,fs)~_(-26.0MeV,1.23).展开更多
The effective mass of ρ-meson in medium has been calculated for the Welecka, Bonn potential, Zimanyi-Moszkowski, quark-meson coupling and vector-tensor coupling models, respectively. The vacuum fluctuation effects ar...The effective mass of ρ-meson in medium has been calculated for the Welecka, Bonn potential, Zimanyi-Moszkowski, quark-meson coupling and vector-tensor coupling models, respectively. The vacuum fluctuation effects are taken into account. It is shown that the formula of nucleon effective mass suggested by Brown-Rho scaling can get a best fit with experiments provided the adjusted parameter y equals to 0.10 and 0.19 for strong and weak tensor coupling, respectively.展开更多
A non-topological soliton model with strange quarks is suggested to investigate the phase structure of strange matter.The results are qualitatively in agreement with that obtained by MIT bag model provided the ratio o...A non-topological soliton model with strange quarks is suggested to investigate the phase structure of strange matter.The results are qualitatively in agreement with that obtained by MIT bag model provided the ratio of coupling constants of different quarks to soliton scalar field x_(σ)≡g_(gσ)/g_(qσ) larger than a critical value χ_(c)~0.86,but as χ_(σ) gets smaller than xc,the phase structure may change.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.10905020the China Postdoctoral Science Foundation under Grant Nos.201003245 and 20090460592
文摘We have investigated the quasinormal modes (QNMs) of phantom scalar perturbation in a Reissner-Nordstrm (RN) background.We find that the dependence of QNMs on the mass of the field for the phantom perturbation is totally different from that of usual massive perturbation.However,we obtain the same critical value of the overtone number for an angular quantum number from which the mass will begin to have a reverse effect on the real part of QNM frequencies and the perturbation-independent relation between the QNMs and the second order thermodynamic phase transition.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10325525, 90403029, 10525060, 10525521 and 90303001, the Ministry of Education of China, and the Shanghai Education Commission.
文摘用宇宙的进化历史，一个人能在动态黑暗精力模型的参数空格做限制。我们讨论二个不同 parameterized 黑暗精力模型。我们的结果进一步限制从超新星和 thefirst 年 Wilkinson-microwave-anisostropy-probe 观察获得的联合限制。从允许的参数空间，我们的宇宙将经历永久加速，这被发现。我们也估计界限在在 re 通货膨胀、通货膨胀的阶段的身体上相关的区域。
基金supported by the National Natural Science Foundation of China under Grant No.19975010supported by the National Natural Science Foundation of China under Grant No.19805004.
文摘Ey means of conformal Held theory,we have related the degrees of freedom of microstates to the entropy of three-dimensional charged black hole as well as the entanglement entropy of three-dimensional De Sitter spacetime,We have shown that the degrees of freedom of the conformal theory responsible for the entropy represent states on the horizon and localized in physical spacetime.
基金Supported in part py the National Natural Science Foundation of China under Grant Nos.10075071 and 19975010the Foundation of Education Ministry of China,and Chinese Academy of Sciences under contract No.KJ951-A1-410.
文摘The strange hadronic matter with nucleon,Λ-hyperon andΞ-hyperon is studied by using a chiral symmetry model in a mean-field approximation.The saturation properties and stabilities of the strange hadronic matter are discussed.The result indicates a quite large strangeness fraction(fs)region where the strange hadronic matter is stable against particle emission.In the large fs region,theΞcomponent dominates,resulting in a deep minimum in the curve of the binding energy per baryon EB versus the strangeness fraction fs with(EB,fs)~_(-26.0MeV,1.23).
文摘The effective mass of ρ-meson in medium has been calculated for the Welecka, Bonn potential, Zimanyi-Moszkowski, quark-meson coupling and vector-tensor coupling models, respectively. The vacuum fluctuation effects are taken into account. It is shown that the formula of nucleon effective mass suggested by Brown-Rho scaling can get a best fit with experiments provided the adjusted parameter y equals to 0.10 and 0.19 for strong and weak tensor coupling, respectively.
基金Supported in part by the National Natural Science Foundation of China under Grant No.19575010.
文摘A non-topological soliton model with strange quarks is suggested to investigate the phase structure of strange matter.The results are qualitatively in agreement with that obtained by MIT bag model provided the ratio of coupling constants of different quarks to soliton scalar field x_(σ)≡g_(gσ)/g_(qσ) larger than a critical value χ_(c)~0.86,but as χ_(σ) gets smaller than xc,the phase structure may change.
