【摘 要】
：
We developed a systematic non-perturbative method base on Dyson-Schwinger theory and the Φ-derivable theory for Ising model at broken phase.Based on these methods,we obtain critical temper-ature and spin spin correlation beyond mean field theory.The spect
【机 构】
：
School of Physics,Peking University,Beijing 100871,China;Collaborative Innovation Center of Quantum
论文部分内容阅读
We developed a systematic non-perturbative method base on Dyson-Schwinger theory and the Φ-derivable theory for Ising model at broken phase.Based on these methods,we obtain critical temper-ature and spin spin correlation beyond mean field theory.The spectrum of Green function obtained from our methods become gapless at critical point,so the susceptibility become divergent at Tc.The critical temperature of Ising model obtained from this method is fairly good in comparison with other non-cluster methods.It is straightforward to extend this method to more complicate spin models for example with continue symmetry.
其他文献
镇江乡镇系列地图以“立足乡镇、鸟瞰现状、展望未来”为总体设计思路,为地方各级政府在全面摸清家底、纵览区域全貌与规划分析决策等方面提供全方位、多用途的地图和测绘地理信息服务.本文详细介绍了镇江乡镇系列地图项目的编制特色、设计方案及制作工艺流程,为今后其他城市继续开展乡镇地图建设提供借鉴与参考.
结合武汉市城市地下管线普查及信息平台建设实践,本文设计并实现了城市地下管线时空数据管理系统,重点阐述了城市地下管线时空数据库设计、时空数据管理系统总体设计和功能模块设计等3个方面的内容,对城市地下管线时空数据库管理具有一定的借鉴意义.
测绘生产单位或生产部门如何高效率、高质量、低成本的完成生产任务,生产管理往往起着决定性的作用.本文基于作者多年测绘生产项目的管理实践,结合测绘工作特点及实际情况,对测绘生产管理的方法与经验进行总结和思考,并提出一些方法和思路,以期为测绘生产项目管理工作提供借鉴.
When the muon was discovered almost 80 years ago[1],it turned the particle physics world upside-down.Until today,nobody knows“who ordered it?”as questioned by I.I.Rabi and what role this second generation elementary particle played in the formation of the
Idiscuss the scope and naturalness of the proton mass decomposition(or sum rule)published in Phys.Rev.Lett.74,1071(1995)and answer a few criticisms that appeared recently in the literature,focusing par-ticularly on its interpretation and the quantum anoma
根据国家规定,我国每隔十年会进行一次全国性的土地调查,耕地坡度调查作为土地调查的一部分,也是重要基础资料和成果.本文首先简述了制作耕地坡度图(以下简称“坡度图”)的基本方法,其次论述了制作过程中需要注意的问题,最后提出了几类经常出现的问题并总结了解决方法.
Initial State Radiation(ISR)plays an important role in e+e-collision experiments such as the BESIII.To correct the ISR effects in measurements of hadronic cross-sections of e+e-annihilation,an iterative method that weights simulated ISR events is proposed
结合作者多年从事测绘生产与管理实践经验,对如何抓好质量建设做了深入的分析与思考,从文化、制度、人员、管理和创新5个方面入手,阐述了质量理念、体制机制、业务能力、指导验收、创新方法在质量建设中的作用.
Lepton scattering is an established ideal tool for studying inner structure of small particles such as nucleons as well as nuclei.As a future high energy nuclear physics project,an Electron-ion collider in China(EicC)has been proposed.It will be construct
Transition-metal chalcogenides(TMCs)materials have attracted increasing interest both for fundamen-tal research and industrial applications.Among all these materials,two-dimensional(2D)compounds with honeycomb-like structure possess exotic electronic stru