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Gravitational waves and primordial black hole productions from gluodynamics by holography
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作者 Song He Li Li +1 位作者 Zhibin Li Shao-Jiang Wang 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2024年第4期31-42,共12页
Understanding the nature of quantum chromodynamics(QCD)matter is important but challenging due to the presence of nonperturbative dynamics under extreme conditions.We construct a holographic model describing the gluon... Understanding the nature of quantum chromodynamics(QCD)matter is important but challenging due to the presence of nonperturbative dynamics under extreme conditions.We construct a holographic model describing the gluon sector of QCD at finite temperatures in the non-perturbative regime.The equation of state as a function of temperature is in good accordance with the lattice QCD data.Moreover,the Polyakov loop and the gluon condensation,which are proper order parameters to capture the deconfinement phase transition,also agree quantitatively well with the lattice QCD data.We obtain a strong first-order confinement/deconfinement phase transition at Tc=276.5 Me V that is consistent with the lattice QCD prediction.Based on our model for a pure gluon hidden sector,we compute the stochastic gravitational waves and primordial black hole(PBH)productions from this confinement/deconfinement phase transition in the early Universe.The resulting stochastic gravitational-wave backgrounds are found to be within detectability in the International Pulsar Timing Array and Square Kilometre Array in the near future when the associated productions of PBHs saturate the current observational bounds on the PBH abundances from the LIGO-Virgo-Collaboration O3 data. 展开更多
关键词 AdS/QCD confinement/deconfinement phase transition gravitational wave primordial black hole
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F-L模型的状态方程与退禁闭相变图象 被引量:2
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作者 邓胜华 李家荣 《高能物理与核物理》 CSCD 北大核心 1994年第5期424-427,共4页
用温度场论方法计算了F-L模型在有限温度和密度下的状态方程,分析了压强对净重子数密度的等温线.结果表明,在平均场近似下,F-L模型所给出的退禁闭相变为一级相变.
关键词 状态方程 孤子袋模型 退禁闭相变
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Soliton Solutions of F-L Model in the Whole Range of Temperature and Deconfinement Transition
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作者 邓胜华 李家荣 《Chinese Science Bulletin》 SCIE EI CAS 1994年第6期463-468,共6页
The non-topological soliton bag model of Friedberg and Lee (F-L model), whichis developed by Goldflam and Wilets and others, has been much successful indescribing phenomenologically the static properties of hadrons an... The non-topological soliton bag model of Friedberg and Lee (F-L model), whichis developed by Goldflam and Wilets and others, has been much successful indescribing phenomenologically the static properties of hadrons and their behavior atlow energy. Particularly, with the finding of the numerical soliton solution for thespecial case of temperature being zero and bag constant B=0^+, the model affordsus a very intuitive physical explanation of the color confinement in QCD theory.For other different values of B, especially for non-trivial temperature, someinvestigation on the deconfinement transition has been made in Ref.[3], etc. byanalyzing the variation condition in which soliton solutions exist, but it remains to besettled to find the concrete solutions. In this note, we will solve directly the 展开更多
关键词 SOLITON BAG MODEL SOLITON solution deconfinement phase transition.
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Expanding the thermodynamical potential and analysis of the possible phase diagram of deconfinement in the FL model
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作者 舒崧 李家荣 《Chinese Physics C》 SCIE CAS CSCD 2012年第4期316-321,共6页
Deconfinement phase transition is studied in the FL model at finite temperature and chemical potential. At MFT approximation, phase transition can only be first order in the whole μ-T phase plane. Using a Landau expa... Deconfinement phase transition is studied in the FL model at finite temperature and chemical potential. At MFT approximation, phase transition can only be first order in the whole μ-T phase plane. Using a Landau expansion, we further study the phase transition order and the possible phase diagram of deconfinement. We discuss the possibilities of second order phase transitions in the FL model. From our analysis, if the cubic term in the Landau expansion could be cancelled by the higher order fluctuations, second order phase transition may occur. By an ansatz of the Landau parameters, we obtain a possible phase diagram with both the first and second order phase transitions, including the tri-critical point which is similar to that of the chiral phase transition. 展开更多
关键词 deconfinement phase transition soliton model finite-temperature field theory
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Scalar-isovector δ-meson mean-field and mixed phase structure in compact stars
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作者 Grigor Bakhshi Alaverdyan 《Natural Science》 2010年第5期489-493,共5页
The deconfinement phase transition from ha-dronic matter to quark matter in the interior of compact stars is investigated. The hadronic phase is described in the framework of relativistic mean-field (RMF) theory, when... The deconfinement phase transition from ha-dronic matter to quark matter in the interior of compact stars is investigated. The hadronic phase is described in the framework of relativistic mean-field (RMF) theory, when also the scalar-isovector δ-meson effective field is taken into account. The MIT bag model for describing a quark phase is used. The changes of the pa-rameters of phase transition caused by the pre- sence of δ-meson field are investigated. Finally, alterations in the integral and structure para-meters of hybrid stars due to deconfinement phase transitions are discussed. 展开更多
关键词 Neutron Stars Equation of State RELATIVISTIC MEAN-FIELD QUARKS deconfinement phase transition
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改进的PNJL模型下QCD的相图
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作者 唐占铎 邵国运 +2 位作者 高雪艳 高宁 贺伟博 《原子核物理评论》 CSCD 北大核心 2017年第3期575-579,共5页
Polyakov-Nambu-Jona-Lasinio(PNJL)模型是研究强相互作用物质性质的使用最为广泛的有效模型之一。在PNJL模型的基础上考虑了手征凝聚和Polyakov圈之间的纠缠作用,并且引入了化学势修正的Polyakov有效势,由此得到了化学势依赖的entangle... Polyakov-Nambu-Jona-Lasinio(PNJL)模型是研究强相互作用物质性质的使用最为广泛的有效模型之一。在PNJL模型的基础上考虑了手征凝聚和Polyakov圈之间的纠缠作用,并且引入了化学势修正的Polyakov有效势,由此得到了化学势依赖的entangled PNJL(μEPNJL)模型。在平均场框架下的计算结果表明:相较于原始的PNJL模型,由μEPNJL模型计算得到的临界点(CEP)朝着温度更高、化学势更小处移动,并且手征对称性恢复相变和退禁闭相变在较大的化学势范围内都重合得很好。通过与STAR合作组在相对论重离子对撞机(RHIC)上进行的净质子数分布的测量结果相比,可以发现,通过适当的参数调节,由μEPNJL模型计算得到的CEP更加靠近实验预言的CEP可能存在的区域。 展开更多
关键词 强相互作用物质 相图 手征对称性恢复相变 退禁闭相变 临界点
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Dual fermion condensate and phase transition in QED_3
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作者 FENG HongTao YIN PeiLin +1 位作者 SUN WeiMin ZONG HongShi 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2013年第6期1116-1119,共4页
In this paper,we investigate the behaviors of dual fermion condensate in QED 3 under variation of temperature.By means of Dyson-Schwinger equation for the fermion propagator,we extract the dual fermion condensate and ... In this paper,we investigate the behaviors of dual fermion condensate in QED 3 under variation of temperature.By means of Dyson-Schwinger equation for the fermion propagator,we extract the dual fermion condensate and compare its behavior with the ordinary chiral fermion condensate and the chiral susceptibility.It is found that the dual fermion condensate cannot be regarded as the order parameter for the confinement-deconfinement phase transition in QED 3.Furthermore,the change of the dual fermion condensate around the chiral phase transition point observed in the present work must therefore be interpreted as solely induced by the chiral transition. 展开更多
关键词 QED 3 dual fermion condensate deconfinement phase transition chiral phase transition
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变分累积展开方法中确定相变点的新方法
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作者 卢强 李红 陈天仑 《高能物理与核物理》 SCIE CAS CSCD 北大核心 2001年第2期95-100,共6页
在计算有限温度SU(2)格点规范模型Polyakov线的过程中,考虑到变分 累积展开法中有限距离相互作用效应与 Monte Carlo中的有限体积效应的相似 性,采用了新的方法来确定相变点.与已有的方法以及 Monte C... 在计算有限温度SU(2)格点规范模型Polyakov线的过程中,考虑到变分 累积展开法中有限距离相互作用效应与 Monte Carlo中的有限体积效应的相似 性,采用了新的方法来确定相变点.与已有的方法以及 Monte Carlo模拟给出的 结果比较,新方法给出的结果更接近 Monte Carlo结果. 展开更多
关键词 格点规范理论 退禁闭相变 变分累积展开 相变点
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中子星内部强子-夸克相变的有限尺度效应研究
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作者 武旭浩 申虹 《原子核物理评论》 CSCD 北大核心 2017年第3期509-513,共5页
在致密星体内部极高密度条件下,强子物质可能发生退禁闭相变成为夸克物质,即强子-夸克相变。这种相变过程对于中子星的性质有着重要影响。考虑库仑能和表面能的影响,即有限尺度效应,相变过程中的混杂相包含了被称为pasta相的几何结构。... 在致密星体内部极高密度条件下,强子物质可能发生退禁闭相变成为夸克物质,即强子-夸克相变。这种相变过程对于中子星的性质有着重要影响。考虑库仑能和表面能的影响,即有限尺度效应,相变过程中的混杂相包含了被称为pasta相的几何结构。强子-夸克共存相的平衡条件是通过求总能量的最小值得到的。采用相对论平均场(RMF)模型来描述强子物质相,采用Nambu-Jona-Lasinio(NJL)模型来描述夸克物质相。有限尺度效应一定程度上增加了中子星的最大质量,增加幅度取决于强子-夸克表面张力的大小。有限尺度效应能够降低混杂相的范围,其结果介于Gibbs结构和Maxwell结构的结果之间。研究结果表明,中子星中可能包含一个混杂相的核心部分,其大小受到表面张力等参数的影响。 展开更多
关键词 中子星 强子-夸克相变 有限尺度效应
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格点Z(N)有限温度规范理论退禁闭相变的解析研究
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作者 刘文生 鲁公儒 杨金民 《郑州纺织工学院学报》 1994年第1期20-28,共9页
本文把变分累积展开推广到(d+1)维括点Z(N)有限温度规范理论,研究了d=2和d=3:情况下的Z(2)、Z(3)有限温度退禁闭相变的相结构。所得结果与平均场和MonteCarlo结果做了比较。
关键词 格点规范理论 退禁闭相变 累积展开
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Deconfinement Phase Transition Including Perturbative QCD Corrections in (Proto)neutron Star Matter
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作者 GU Jian-Fa GUO Hua +2 位作者 LEE Xi-Guo LIU Yu-Xin XU Fu-Rong 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第2期461-466,共6页
Deconlinement phase transition and neutrino trapping in (proto)neutron star matter are investigated in a chiral hadronic model (also referred to as the FST model) for the hadronic phase (HP) and in the color-fla... Deconlinement phase transition and neutrino trapping in (proto)neutron star matter are investigated in a chiral hadronic model (also referred to as the FST model) for the hadronic phase (HP) and in the color-flavor-locked (CFL) quark model for the deconlined quark phase. We include a perturbative QCD correction parameter αs in the CFL quark matter equation of states. It is shown that the CFL quark core with K^0 condensation forms in neutron star matter with the large value of αs. If the small value of αs is taken, hyperons suppress the CFL quark phase and the liP is dominant in the high-density region of (proto)neutron star matter. Neutrino trapping makes the fraction of the CFL quark matter decrease compared with those without neutrino trapping. Moreover, increasing the QCD correction parameter as or decreasing the bag constant B and the strange quark mass ms can make the fraction of the CFL quark matter increase, simultaneously, the fraction of neutrino in protoneutron star matter increases, too. The maximum masses and the corresponding radii of (proto)neutron stars are not sensitive to the QCD correction parameter αs. 展开更多
关键词 deconfinement phase transition neutrino trapping neutron star matter
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Deconfinement Phase Transition with External Magnetic Field in the Friedberg-Lee Model
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作者 毛施君 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第11期31-35,共5页
The deconfinement phase transition with external magnetic field is investigated in the Friedberg-Lee model. We expand the potentiM around the two locM minima of the first-order deconfinement phase transition and extra... The deconfinement phase transition with external magnetic field is investigated in the Friedberg-Lee model. We expand the potentiM around the two locM minima of the first-order deconfinement phase transition and extract the ground state of the system in the frame of functional renormalization group. By solving the flow equations we find that the magnetic field displays a catalysis effect and it becomes more difficult to break through the confinement. 展开更多
关键词 of on AS in QCD deconfinement phase transition with External Magnetic Field in the Friedberg-Lee Model with IS
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Multiple configurations of neutron stars containing quark matter
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作者 Wei Wei Shu-Hua Yang +3 位作者 Ze-Han Bao Chong Zhang Chang Gao Wei-Ru Fan 《Chinese Physics C》 SCIE CAS CSCD 2020年第9期112-121,共10页
The main purpose of this study is to interpret the possibilities of hybrid star configurations under different phase transition paths and provide a general description of the conditions and features of the different c... The main purpose of this study is to interpret the possibilities of hybrid star configurations under different phase transition paths and provide a general description of the conditions and features of the different configurations.We assume that there are two possible phase transition paths,i.e.,from a nuclear phase to a 2flavor(2f)/3flavor(3f)quark phase directly,or first from a nuclear phase to a 2f quark phase,and then from that phase to a 3f quark phase sequentially.In addition,we consider Maxwell and Gibbs constructions based on the assumption of a first-order transition,which yields multiple configurations of hybrid stars:N-2f,N-3f,and N-2f-3f for a Maxwell construction,and N-2fmix-2f,N-3fmix-3f,N-2f3fmix,and N-2fmix-3f for a Gibbs construction.From the radii analysis of different hybrid star configurations with the same mass of 1.95M⊙,the appearance of the quark matter(from nuclear to 2f or 3f quark matter)causes a radius difference of 0.5km^2km and provides the possibility of detection by NICER in the future.However,the sequential transition from 2f to 3f quark matter is difficult to detect because the transition does not lead to too high of a change in radius(far smaller than 0.5km).The dependence solely on the measurements of the stellar radii to probe the equation of state of dense matter in neutron stars causes difficulties.Multi-messenger observations can help us to infer the interior of a neutron star in the future. 展开更多
关键词 neutron star deconfinement phase transition quark matter equation of state
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有限温度下QCD的γ函数和格林函数的渐近行为
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作者 高嵩 《华中师范大学学报(自然科学版)》 CAS CSCD 1992年第3期289-292,共4页
用实时间温度场论中和重整化群方法,研究了QCD的β函效、反常量纲和林函数的高温行为,其结果显示了QCD的退禁闭性质。
关键词 有限温度 重整化群 退禁闭
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退禁闭相变和孤子性质的研究
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作者 董仁达 舒崧 张辉 《湖北大学学报(自然科学版)》 CAS 2015年第5期447-450,455,共5页
研究有限温度密度下的FL模型,通过温度场论的标准方法,得到有限温度密度下的有效势.在FL模型中,重子内部亚稳态真空与外部物理真空有效势相等时退禁闭相变发生.据此在有限温度密度下进行计算,得到FL模型中的退禁闭相图.研究发现,该模型... 研究有限温度密度下的FL模型,通过温度场论的标准方法,得到有限温度密度下的有效势.在FL模型中,重子内部亚稳态真空与外部物理真空有效势相等时退禁闭相变发生.据此在有限温度密度下进行计算,得到FL模型中的退禁闭相图.研究发现,该模型在强子相一直有稳定的孤子解,发生退禁闭相变后孤子解消失,孤子的变化与退禁闭相变的物理图像一致. 展开更多
关键词 退禁闭相变 FL模型 孤子 温度场论
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有限温度下非拓扑孤子模型的有效势与禁闭解除相变
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作者 田永红 王恩科 《荆州师专学报》 1992年第2期49-52,共4页
本文用标准的圈图展开方法计算了非拓扑孤子模型在单圈修正下的有效势,得到了有效势的极值点满足的方程,分析了禁闭解除相变的特征.
关键词 有效势 禁闭 禁闭解除相变 非拓扑孤子模型 QCD 强子
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Critical behavior of higher cumulants of order parameter in the 3D-Ising universality class 被引量:1
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作者 陈丽珠 潘雪 +1 位作者 陈晓松 吴元芳 《Chinese Physics C》 SCIE CAS CSCD 2012年第8期727-732,共6页
QCD deconfinement phase transition is supposed to be the same universality class as the 3D-Ising model. According to the universality of critical behavior, the Binder-like ratios and ratios of higher cumulants of orde... QCD deconfinement phase transition is supposed to be the same universality class as the 3D-Ising model. According to the universality of critical behavior, the Binder-like ratios and ratios of higher cumulants of order parameter near the critical temperature in the 3D-Ising model are studied. The Binder-like ratio is shown to be a step function of temperature. The critical point is the intersection of the ratios of different system sizes between two platforms. The normalized cumulant ratios, like the Skewness and Kurtosis, do not diverge with correlation length, contrary to the corresponding cumulants. Possible applications of these characters in locating critical point in relativistic heavy ion collisions are discussed. 展开更多
关键词 QCD deconfinement phase transition critical point 3D-Ising model Binder-like ratios ratios of higher cumulants
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QCD phase diagram with the improved Polyakov loop effective potential
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作者 Guo-Yun Shao Xue-Yan Gao +1 位作者 Zhan-Duo Tang Ning Gao 《Nuclear Science and Techniques》 SCIE CAS CSCD 2016年第6期61-66,共6页
We report our recent progress on the QCD phase structure.We explore the properties of quark–gluon matter in the improved Polyakov–Nambu–Jona–Lasinio(PNJL)model by introducing a chemical potential-dependent Polyako... We report our recent progress on the QCD phase structure.We explore the properties of quark–gluon matter in the improved Polyakov–Nambu–Jona–Lasinio(PNJL)model by introducing a chemical potential-dependent Polyakov loop potential.This treatment effectively reflects the quantum backreaction of matter sector to glue sector at nonzero chemical potential.Compared with the original PNJL model,a superiority of the improved PNJL model is that it can effectively describe the confinement–deconfinement transition at low temperature and high density.And the QCD phase diagram will be modified to a certain degree if the strength of the quantum backreaction of matter sector to glue sector is strong.One evident variation is that the region of quarkyonic phase will be greatly reduced in the improved PNJL model.This means that the modification to the Polyakov loop potential with the chemical potential dependence is possibly a significant improvement in exploring the full QCD phase structure. 展开更多
关键词 QCD 相图 有效势 NJL模型 夸克胶子物质 化学势 相位结构 势模型
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