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1. chinaXiv:201907.00002 [pdf]

The Change of the Electron Clouds of Ions in Cuprate Superconductor CaCuO2: A First-Principles Investigation of the Electron-Pairing

Tiege Zhou
Subjects: Physics >> Condensed Matter: Electronic Structure, Electrical, Magnetic, and Optical Properties

P. W. Anderson raised an important question in 2007: Is There Glue in Cuprate Superconductors? The author believes that the change of the electron clouds of ions is the glue in cuprate superconductors. The change of the electron clouds of the ions in the parent structure of the layered high-temperature superconductors CaCuO2 has been studied by the first-principles calculations. The electron clouds of Cu2+ and O2- ions change obviously under electric fields. It is also found, for the first time, the characteristic frequencies of the change of the electron clouds are 250 meV, 360 meV, and 100 meV, respectively, for the modes observed. The frequencies are low and close to that of lattice vibrations, indicating the change of the electron cloud of ions can be the electron-pairing medium in cuprate superconductors.

submitted time 2019-07-02 Hits134Downloads53 Comment 0

2. chinaXiv:201906.00024 [pdf]

Characteristic frequency of the orbital fluctuation in the unconventional iron-based superconductor BaFe2As2: A TDDFT investigation of the electron pairing mechanism

Tiege Zhou
Subjects: Physics >> Condensed Matter: Electronic Structure, Electrical, Magnetic, and Optical Properties

It is proposed that the electron-pairing medium of the iron-based superconductors may be the orbital fluctuation of the transition metal ions. But the characteristic frequency of the orbital fluctuation has not been given. For the first time, the author has calculated the real-time evolution of the electron clouds of transition metal ions in BaFe2As2 under excitations by the time-dependent density functional theory (TDDFT). There are different modes of fluctuations. The characteristic frequencies are 150 meV, 160 meV, 250 meV, and 200 meV, respectively, for the modes the author observed. The results are unexpected, because the general view is that the change of the electron density is very quick, and the frequency is much higher than the lattice vibration. The frequencies the author obtained are close to that of the lattice vibration in conventional superconductors at normal and high pressures, indicating the orbital (or electron cloud) fluctuation can by the electron pairing medium. Based on the calculation results, the author proposed a new electron pairing mechanism.

submitted time 2019-06-13 Hits140Downloads76 Comment 0

3. chinaXiv:201905.00050 [pdf]

基于单极感应问题的多极感应实验

张学亮
Subjects: Physics >> Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics

针对单极感应之谜,本文注意到磁力线是闭合线,利用洛伦茨力概念首先证明N与M两种对立观点都能够合理解释自法拉第时期以来典型的、有较大影响的单极感应实验。并采用等效电路和比较简明的方法推演出单极感应实验测量回路中感应电动势的一般表达式,说明单极感应问题至今未果的原因是实验采用的轴对称磁体外围磁场特殊的对称性分布结构,且分布结构不随磁体旋转而改变造成的。也说明单极感应实验本身无法解决单极感应问题。介绍了一种多极感应实验方案与实验结果,结合实验磁体外围磁场分布状况,同样用N与M两种观点对照分析了实验结果,得出了法拉第与韦伯当年的单极感应实验测量回路中的感应电动势是由磁体外相对于实验室参照系静止的线段产生的结论,该结论与M观点的结论一致。

submitted time 2019-05-08 Hits1195Downloads148 Comment 0

4. chinaXiv:201904.00095 [pdf]

Real-Time Evolution of the Electron Clouds of Transition Metal Ions: Electron-Pairing Medium of Unconventional High Temperature Superconductors

Tege Zhou
Subjects: Physics >> Condensed Matter: Electronic Structure, Electrical, Magnetic, and Optical Properties

The electron-pairing mechanism in unconventional high temperature superconductors (HTS) has not been resolved. The author proposed that the electron-pairing medium of unconventional HTS is the change of the electron clouds of transition metal ions, which is analogous to the lattice vibration in conventional superconductors. Real-time evolution of the electron clouds of transition metal ions under excitations in La2Fe2As2O2, FeSe sheet, Fe2KSe2, CaCuO2, and HgBa2Ca2Cu3O8 was calculated by the time-dependent density functional theory (TDDFT). The characteristic frequency is about 90-250 meV, which is equivalent to the lattice vibration frequencies, showing that the change of the electron clouds of the transition metal ions can be the electron-pairing medium in unconventional HTS.

submitted time 2019-04-24 Hits724Downloads172 Comment 0

5. chinaXiv:201802.00685 [pdf]

An Explanation of the Interactions between Waves and Electrons: Discussion of Electromagnetic Fields

Weiye Xu
Subjects: Physics >> The Physics of Elementary Particles and Fields

The interactions between waves and electrons are the basis of vacuum tubes and particle accelerators. In order to further understand the interactions, we proposed a new electromagnetic model. In this model, the photon is composed of two elementary particles – ephoton and mphoton, which are the basic particles that form the electric fields and magnetic fields, respectively. There are many ephotons around the electrons and the electrons can absorb the ephotons. The proposed electromagnetic model can well explain the electromagetic phenomena and the interactions between waves and electrons.

submitted time 2019-04-12 Hits3020Downloads1060 Comment 0

6. chinaXiv:201905.00054 [pdf]

多体多自由度量子隐形传态的张量表示

征夏明
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

[目的] 找到一种最普遍情况下量子隐形传态的一般表示及代数结构。 [方法] 归纳推理与演绎推理,利用多项式相乘与张量积之间的等价性发现一般规律。 [结果] 将多体单自由度或单体多自由度的量子隐形传态推广至多体多自由度,以及混合态。 [局限] 无法推广至连续谱量子态。 [结论] 预言多体多自由度单次量子隐形传态的存在,并包含了已被实验证实的所有特殊情况。

submitted time 2019-04-11 Hits1462Downloads135 Comment 0

7. chinaXiv:201905.00053 [pdf]

纠缠态判据与高阶张量可分性的充分必要条件

征夏明
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

[目的] 找到高阶张量和纯态可写成多个低阶张量乘积的充要条件。 [方法] 类比推理、归纳推理,从多元函数可分离变量的充要条件出发,利用与矩阵的代数余子式的性质,最后得到一般的结论。 [结果] 证明定理及其多个等价形式。 [局限] 不适用于混合态。 [结论] 纯态是否是纠缠态的充要条件。

submitted time 2019-04-11 Hits1496Downloads120 Comment 0

8. chinaXiv:201904.00075 [pdf]

A non-Lorentz transformation corresponding to the symmetry of inertial systems as an alternative to the rainbow model.pdf

胡锦文
Subjects: Physics >> Geophysics, Astronomy, and Astrophysics

在Lorentz破缺模型中,通常会讨论彩虹模型,因为彩虹模型可以使粒子的能量具有极限而不是与Lorentz变换相对应的具有无限值,而这在量子引力中被认为是必需的。然而,本文表明,当我们只是坚持时空是均匀的,空间是各向同性的并且所有惯性系统都是等价时,并没有必要将光速限制为常数。并且由于光速的变化,我们可以完全构造惯性系统的坐标变换,使粒子的能量有一个极限,而这与彩虹模型相同。 此外,在最近的论文中,作为超高能量尺度的测试,彩虹模型用于研究伽马射线爆,例如GRB 160509A事件,该事件强烈暗示光速随其能量变化的线性形式。所以我们也分析了这个事件,发现我们的模型和彩虹模型之间存在联系。最后,我们简要讨论了如何在超高能量级的未来粒子实验中验证这两个模型。

submitted time 2019-04-03 Hits975Downloads227 Comment 0

9. chinaXiv:201904.00071 [pdf]

湍流手性:可逆系统的平衡与非平衡有螺系综

朱建州
Subjects: Physics >> Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics
Subjects: Physics >> Geophysics, Astronomy, and Astrophysics

研究基于修改Navier-Stokes方程而得到可逆守恒系统的有螺湍流研究思路和理论。讨论三维可压缩湍流统计力学分析及螺度控制力热声问题。构建了一个非平衡系综的有螺可逆系统。最后简要讨论工程应用。

submitted time 2019-03-31 Hits1219Downloads195 Comment 0

10. chinaXiv:201903.00191 [pdf]

等离子体非线性手性:有螺湍流态及呼吸子

陈鹏; 杨焱; 朱建州
Subjects: Physics >> Physics of Gases, Plasmas, and Electric Discharges
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

等离子体湍流(如太阳风)中体现的(矢端图)螺旋现象和信号(近似)谐振现象并不一定表示线性波动行为。不同环境下等离子体可以有不同的动力学特征,容许存在各种非线性结构。这里讨论在一定时空范围内与线性螺旋波表现类似的有单手性主导的湍动涡模态和呼吸子。前者先通过回顾最近利用扩展磁流体模型统计解特征研究太阳风中的建议得以说明;后者的具体例证还是一个开放的问题,但是我们列举各种来自水波、等离子体和玻色-爱因斯坦凝聚的信息来说明太阳风中应该存在这样的结构。

submitted time 2019-03-31 Hits2688Downloads263 Comment 0

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