【摘 要】
：
We studied the pair production of charged scalar particles of a five-dimensional near extremal Reissner-Nordstr(o)m-Anti de Sitter (RN-AdS5) black hole.The pair production rate and the absorption cross section ratio in full spacetime are obtained and are
【机 构】
：
School of Physics and Astronomy,Sun Yat-Sen University,Guangzhou 510275;Department of Physics,and Ce
论文部分内容阅读
We studied the pair production of charged scalar particles of a five-dimensional near extremal Reissner-Nordstr(o)m-Anti de Sitter (RN-AdS5) black hole.The pair production rate and the absorption cross section ratio in full spacetime are obtained and are shown to have a concise relation with their counterparts in the near horizon re-gion.In addition,the holographic descriptions of the pair production,both in the IR CFT in the near horizon region and the UV CFT at the asymptotic spatial boundary of the RN-AdS5 black hole,are analyzed in the AdS2/CFT1 and AdS5/CFT4 correspondences,respectively.This work gives a complete description of scalar pair production in a near extremal RN-AdS5 black hole.
其他文献
采用固体混合制样方法研究了标准加入法在激光剥蚀电感耦合等离子体质谱(LA-ICP-MS)测定粉末样品中的应用.以汽车尾气催化剂中贵金属元素为研究对象,选择具有2,4-二巯基-1,3,5-三嗪官能团的硅胶(DMT)定量吸附不同含量的贵金属元素,与汽车尾气催化剂混合均匀后,制备成薄片,使用LA-ICP-MS方法测定各元素强度,以强度为纵坐标,硅胶中待测元素为横坐标绘制工作曲线,通过标准加入法计算汽车尾气催化剂中贵金属元素含量.讨论了不同官能团硅胶的选择,pH对贵金属吸附的影响,制样方式对均匀性的影响.结果 表
建立了使用高温氦气逆流方式加热的管式活塞流碘化氢(HI)分解膜反应器数学模型,利用有限时间热力学理论和最优控制理论以总熵产率(EGR)最小为目标求解了反应器的最优构型,最优反应器的总熵产率相比参考反应器降低了15.8％.在改变氦气入口流率的情况下,设计了总熵产率与最优反应器相同的加长反应器.结果 表明,两种优化后反应器总熵产率的减少主要是传热过程的不可逆性降低引起的,最优反应器局部熵产率分布更均匀.
本文将地埋管储热和水箱储热相耦合,组合成了新型地下跨季节复合储热系统,结合实验研究和数值计算的方法开展了热扩散机理与储/释热特性的研究.结果表明,储热阶段,地埋管储热起到“热屏”作用,抑制了水箱储热模式的热量向外围扩散;释热阶段,水箱储热有效回收了地埋管储热释放到土壤中的热量,增大了释热量.并结合热储存率和利用率定量分析了热量扩散程度,复合储热模式的热储存率和利用率均高于传统水箱储热模式和地埋管储热模式,热量得到了更高效的储存和再利用,其中复合储热模式效率为67.29％,水箱储热模式和地埋管储热模式分别为
In this study,the non-trival effect of the selection of reference particles for decay angle definitions is demonstrated when constructing the partial-wave amplitude of multi-body decays using helicity formalism.This is-sue is often ignored in the standard
空气源热泵以其方便灵活、高效环保的特点得到了较为广泛的推广和应用.然而,空气源热泵在低温高湿环境下的结霜问题严重制约了其高效稳定运行.首先从结霜机理出发,将表面冷凝结霜的初期划分为液滴冷凝、液滴开始冻结、霜层传播和霜层积聚四个阶段.其次,对近年来空气源热泵的常见抑霜方法进行了总结归纳,重点介绍了调整蒸发器入口空气参数、优化换热器结构设计、换热器表面改性和外加电磁场等抑霜方法的研究进展.此外,介绍了现有空气源热泵常见的除霜方法及研究现状,并为实现空气源热泵在低温高湿条件下的高效运行,提出了进一步研究的方向和
The present study is dedicated to light-strange A with strangeness S =-1 and isospin I =0,∑ with S =-1 and I =1,and[I]baryon with S =-2 and I =1/2.In this study,the hypercentral constituent quark model with lin-ear confining potential has been employed al
In this article,we illustrate how to calculate the hadronic coupling constants of the pentaquark states with QCD sum rules based on rigorous quark-hadron quality.We then study the hadronic coupling constants of the low-est diquark-diquark-antiquark type h
Inspired by the newly observed X0(2900) and X1 (2900) states at LHCb,the K*(D)* and K(D)1 interactions are studied in the quasipotential Bethe-Salpeter equation approach combined with the one-boson-exchange model.The bound and virtual states from the inte
First-principle calculations within the density functional theory framework are used to study the probab-ility of electron capture for the 7Be nucleus.For this purpose,electron density at the 7Be nucleus is computed in A1,Au,Pd,Pt,and Pb environments.Our
The formation of large size clusters,and/or their relative motion as a possible excitation mode,are sug-gested to be closely related to the origin of deformation in specific cases,namely the case of two doubly-magic clusters or two clusters with nearby ch