Oblique parameters in gauged baryon and lepton numbers with a 125 GeV Higgs

In an extension of the standard model, where baryon number and lepton number are local gauge sym- metries, we analyze the effect of corrections from exotic fermions and scalars on the oblique parameters S, T, U. Because a light neutral Higgs h0 with mass around 12-126 GeV strongly constrains the corresponding parameter space of this model, we also investigate the gluon fusion process gg→h0 and two photon decay of the lightest neutral Higgs h0→yy at the Large Hadron Collider.     

Optical quantum simulation of Abelian gauge field using cold atomic ensembles coupled with arrays of optical cavities

A potentially practical scheme is proposed to realize optical quantum simulation of artificial Abelian gauge field in a scalable architecture consisting of cold atomic ensembles with optical cavities.In the present model,the collective excitations of cold atomic ensembles can be converted to the bosonic modes within the low-excitation limit,where the structure of two-dimension(2D)square plaquette enables the polaritons to move like a charged particle subjected to an external magnetic field.We find that the energy spectrum of this hybrid system exhibits a shape of Hofstadter buttery.Our work provides a different perspective to the quantum simulation of condensed matter and many-body physics in the context of cavity quantum electrodynamics.The experimental feasibility are justified using the existing techniques.     

Gauge bosons at zero and finite temperature

Gauge theories of the Yang–Mills type are the single most important building block of the standard model of particle physics and beyond. They are an integral part of the strong and weak interactions, and in their Abelian version of electromagnetism. Since Yang–Mills theories are gauge theories their elementary particles, the gauge bosons, cannot be described without fixing a gauge. Therefore, to obtain their properties a quantized and gauge-fixed setting is necessary.     

Space-time aspects of superconductivity

A set of electromagnetic responses of superconductivity, [A] the zero-resistivity and [B] the perfect diamagnetism, has been reconsidered both electrodynamically and quantum mechanically. We point out an equivalence between the London gauge with the boundary condition or his “rigidity” of wave function and the phase locking in the BCS-type macroscopic wave function Φ_macro or the Ginzburg- Landau order parameter at T= 0 K. By reexamining the macroscopic wave function of condensed pairs Φ_macro at the ground state with the Josephson concept of coherent phase locking and the energy spectrum of quasi-particle excitation, we realize that the electric response [A] and magnetic response [B] can be decoupled and separable as independent with each other in the limits of an electrostatic field and of a uniform magnetic field rather than in an electrodynami-cal consideration. They are equally substantial in the physics of superconductivity. We recognize first a proper view to simultaneously account for [A] the zero-resistivity and [B] the perfect diamagnetism in the space-time aspects. By supplementing these space-time aspects with a concept of the gauge field theory, we can reach a further consistent and finally complete understanding of the theory of superconductivity.     

A variational formulation approach to a generalized coupled inhomogeneous Emden–Fowler system

We study a generalized coupled inhomogeneous Emden–Fowler system from the Lagrangian formulation standpoint. A special case of this system was considered in the literature, and necessary and sufficient conditions for the existence of multiple positive solutions were obtained. Here we perform preliminary Noether classification of the generalized system by the direct method. We obtain nine cases for which the system has Noether point symmetries. First integrals are then obtained for the cases which admit Noether point symmetries.     

规范场理论的扩展研究——A场→B场→C场

当今的研究已经证明复杂系统的复杂性主要来自于元素之间的相互作用.在自然科学的研究中,刻画相互作用最成功的方法是物理学中的规范场理论.基于此,回顾了规范场理论发展中3篇具有里程碑意义的论文,展示了规范场理论的发展过程.并以电磁场为例,从系统科学的角度说明规范场理论如何刻画相互作用.之后,在上述论述的基础上,得出一个推论:规范场理论可以扩展到非物理系统,并且总结出应用规范场理论应该具备的4个要件.     

便携式压力变送器检定系统的设计

基于虚拟仪器技术,设计了便携式的压力变送器检定系统。该系统以高精度智能压力表为标准表,以LabView为软件平台,通过计算机完成压力变送器的信号采集与转换,并与标准表进行对比。整个系统具有信号采集、误差计算、报表打印等功能,且携带方便,操作简单,可大大提高工作效率。     

电弱规范玻色子反常相互作用的有效拉氏量描述

电弱规范玻色子之间的反常相互作用对于进一步检验标准模型和寻找超出标准模型的新物理信号都具有重要意义.首先详细推导了粒子物理标准模型中电弱规范玻色子自相互作用的显示形式,然后在介绍探索新物理的有效拉氏量方法基础上,用有效拉氏量方法给出了电弱规范玻色子间反常相互作用的具体形式.根据洛仑兹结构的不同,这些反常相互作用被分成3类:(1)只含Higgs场协变微商的项;(2)同时含Higgs场协变微商和规范场强张量的项;(3)只含规范场强张量的项.     

用歧管压力表诊断汽车空调制冷系统故障

该文从应用歧管压力表诊断空调系统常见故障的方法方面、讨论了诊断汽车空调制冷系统故障的方法、思路及对策,结合歧管压力表测量的压力值对比,以及空调的故障现象提出了相关维修技术建议,为以后的汽车空调故障诊断分析提供了新的思路和策略。     

水陆两栖飞机船体水动力矩特性研究

船体水动力矩特性是水陆两栖飞机水动力性能的重要部分。为了研究某型飞机船体的水动力矩特性,开展了单船身模型水池力矩试验,详细研究了飞机纵倾角、断阶吃水及试验速度对船体水动力矩的影响,并对试验结果的可信度进行对比论证。结果表明该力矩试验得到的船体力矩特性数据具有较高的可信度,船体水动力矩随着断阶吃水和试验速度的增大而增大,而随着纵倾角则呈现先增大再减小的趋势。