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Cosmic Perturbations in yang-Mills Inflation

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Chinese Physics Letters 1997年第3期14卷 237-240页

作者： ZHANG yang Astrophysics Center University of Science and Technology of ChinaHefei 230026

We elaborate the quantum yang-Mills inflationary *** find that a slow-rolling inflation occurs naturally in the presence of a thermal component produced by the decay of yang-Mills *** magnitude of cosmic perturbation ... 详细信息

关键词： Mills closer perturbation

RC-positivity and rigidity of harmonic maps into Riemannian manifolds Dedicated to Professor Lo yang on the Occasion of His 80th Birthday

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Science China Mathematics 2020年第2期63卷 371-380页

作者： Jun Wang Xiaokui yang Yau Mathematical Sciences Center Tsinghua UniversityBeijing 100084China Morningside Center of Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China Hua Loo-Keng Center for Mathematical Sciences Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China

In this paper, we show that every harmonic map from a compact K?hler manifold with uniformly RC-positive curvature to a Riemannian manifold with non-positive complex sectional curvature is constant. In particular, there is no non-constant harmonic map from a compact K¨ahler manifold with positive holomorphic sectional curvature to a Riemannian manifold with non-positive complex sectional curvature.

关键词： RC-positivity harmonic maps pluri-harmonic maps rigidity

Lee–yang zeros in the Rydberg atoms

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Frontiers of physics 2023年第2期18卷 197-204页

作者： Chengshu Li Fan yang Institute for Advanced Study Tsinghua UniversityBeijing 100084China

Lee–yang (LY) zeros play a fundamental role in the formulation of statistical physics in terms of (grand) partition functions, and assume theoretical significance for the phenomenon of phase transitions. In this paper, motivated by recent progress in cold Rydberg atom experiments, we explore the LY zeros in classical Rydberg blockade models. We find that the distribution of zeros of partition functions for these models in one dimension (1d) can be obtained analytically. We prove that all the LY zeros are real and negative for such models with arbitrary blockade radii. Therefore, no phase transitions happen in 1d classical Rydberg chains. We investigate how the zeros redistribute as one interpolates between different blockade radii. We also discuss possible experimental measurements of these zeros.

关键词： Lee-yang zeros Rydberg atom statistical mechanics

Effective Lagrangian of SU（2） yang—Mills Theory in the Presence of Fermions

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Communications in Theoretical Physics 2002年第5期37卷 575-578页

作者： FANJi－yang JIANGYing 等 DepartmentofPhysics QufuNormalUniversityQufu273165China BeijingAstrocomicalObservatory NationalAstronomicalObservatoriestheChineseAcademyofSciencesBeijing100012China

We derive the one-loop effective action of SU(2) yang Mills theory in the presence of fermions in the lowenergy limit. This result is presented by separating the topological degrees, which describe the non-Abelian monopolesfrom the dynamical degrees of the gauge potential and integrate out all the dynamical degrees and fermions in SU(2)yang-Mills theory.

关键词：量子色动力学 SU(2)群色禁闭

Color-kinematics duality for Sudakov form factor in non-supersymmetric pure yang-Mills theory

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Communications in Theoretical Physics 2022年第6期74卷 66-86页

作者： Zeyu Li Gang yang Jinxuan Zhang CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesNo.19A Yuquan RoadBeijing 100049China

We study the duality between color and kinematics for the Sudakov form factors of tr(F~2)in non-supersymmetric pure yang-Mills *** construct the integrands that manifest the color-kinematics duality up to two *** resulting numerators are given in terms of Lorentz products of momenta and polarization vectors,which have the same powers of loop momenta as that from the Feynman *** integrands are checked by d-dimensional unitarity cuts and are valid in any *** find that massless-bubble and tadpole topologies are needed at two loops to realize the color-kinematics ***,the two-loop solution contains a large number of free parameters suggesting the duality may hold at higher loop orders.

关键词： scattering amplitudes form factors color-kinematics duality unitarity method

Is yang-Mills theory unitary in fractional spacetime dimensions?

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 59-64页

作者： Qingjun Jin Ke Ren Gang yang Rui Yu Graduate School of China Academy of Engineering Physics Beijing 100193China School of Physics and Astronomy Sun Yat-Sen UniversityZhuhai 519082China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China International Centre for Theoretical Physics Asia-Pacific Hangzhou 310024China School of Physical Science and Technology Inner Mongolia UniversityHohhot 010021China Beijing Computational Science Research Center Beijing 100193China

We present concrete evidence that yang-Mills theory exhibits non-unitarity in non-integer spacetime *** violation of unitarity stems from evanescent operators that,while vanishing in four dimensions,are non-zero in general d *** demonstrate that these evanescent operators lead to the emergence of both negative-norm states and complex anomalous dimensions.

关键词： gauge field theories field theories in dimensions other than four renormalization

A U(4)QCD Model Using Generalized yang-Mills Theory

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Communications in Theoretical Physics 2008年第9期50卷 703-706页

作者： WANG Dian-Fu ZHONG Hai-yang Department of Physics Dalian Maritime University Dalian 116026 China

Generalized yang-Mills theory has a covariant derivative which contains both vector and pseudoscalargauge *** on this theory,we construct a U(4) strong interaction model By using this U(4) generalizedyang-Mills model,we obtain that mesons can be realized as the colorless pseudoscalar gauge *** also obtain agauge potential solution which can be used to explain the asymptotic behavior and color confinement.

关键词： QCD model yang-Mills theory

Contributions of Lo yang to Value Distribution Theory

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Acta Mathematica Sinica,English Series 2019年第10期35卷 1573-1585页

作者： Yuan WANG Jian Yong QIAO Jing yang Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190P.R.China Beijing University of Posts and Telecommunications Beijing 100876P.R.China Department of Basic Courses Beijing Union UniversityBeijing 100101P.R.China

Professor Lo yang is a world famous mathematician of our country. He made a lot of outstanding achievements in the value distribution theory of function theory, which are highly rated and widely quoted by domestic and foreign scholars. He also did a lot of work to develop Chinese mathematics. It can be said that Professor yang is one of the mathematicians who made main influences on the mathematical development in modern China. This paper briefly introduces Professor yang's life, mainly discusses his academic achievement and influence, and briefly describes his contributions to the Chinese mathematics community.

关键词： Lo yang value distribution theory contribution

Effect of warming yang and supplementing kidney moxibustion therapy on the NF-κB signaling pathway of vascular dementia rats

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World Journal of Acupuncture-Moxibustion 2018年第1期28卷 44-49,I0006,I0007页

作者： Wanli ZHU Kun yang Shengchao CAI Ying WANG Xiaoge SONG Anhui University of Chinese Medidne Hefei 230038 Anhui Province China Second Affiliated Hospital of Anhui University of Chinese Medicine Hefei 230061 Anhui Province China Research Institute of Acupuncture-Moxibustion and Meridians-Collaterals Anhui University of Chinese Medicine Hefei 230038 Anhui Province China

Objective： To observe the effect of warming yang and supplementing kidney moxibustion therapy on the behavioristics and the expression levels of hippocampal IL-1β, TNF-α and NF-κB related genes and proteins of vascular dementia（VD） rats, and to explore the mechanism of warming yang and supplementing kidney moxibustion therapy in inhibiting VD inflammatory response. Methods Seventy-eight SD rats, except 10 rats as sham operation group（group A）, were established into VD models by applying the ischemia reperfusion method in bilateral common carotid arteries. 30 models were successful and were randomly divided into model group（group B）, moxibustion group（group C） and western medication group（group D）, with 10 rats in each group. After modeling, suspended moxibustion was conducted at ＂Dàzhuī（大椎GV 14）＂,＂Mìngmén（命门GV 4）＂ and ＂Guānyuán（关元CV 4）＂ of the rats in group C for15 min/time. The intervention was performed for once a day, and intervention for 4 consecutive weeks was needed. Intragastric administration with nimodipine（2 mgkg-1d-1） was carried out in the rats in group D for 4 consecutive weeks. Morris water maze test was adopted for behavioral test in the rats in each group. HE staining was conducted in order to observe the pathological changes. RT-qPCR method and Western blot method were used for detecting the expression levels of hippocampal IL-1β, TNF-αand NF-κB related genes and ***： After modeling, the Morris water maze escape latency of rats in operation groups was obviously longer than that in group A（P〈0.05）. According to HE staining results, the arrangement of neurons in group B was incompact, the cell membranes were undefined, the cytoplasm was heterogeneous, karyopyknosis was found, the amount of necrosis increased, and the number of inflammatory cells significantly increased. Compared with group B, the number of inflammatory cells significantly reduced in group C and group D, and the amount of neuron necrosis also reduced. After intervention, c

关键词： Moxibustion Vascular dementia rats Inflammatory response NF-κB signaling pathway Hippocampal