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H. Y. Cui

Publications and source records attributed to H. Y. Cui.

10 recordsLinked to original sources
arXiv2006

The direction of Coulomb's force and the direction of gravitational force in the 4-dimensional space-time

In this paper, we point out that the 4-vector force acting on a particle is always in the direction orthogonal to the 4-vector velocity of the particle in the 4-dimensional space-time, rather than along the line joining the particle and the action source. This inference is obviously supported from the fact that the magnitude of the 4-vector velocity is a constant. This orthogonality brings out many new aspects for force concept. In this paper it is found that the Maxwell's equations can be derived from classical Coulomb's force and the orthogonality, some gravitational effects such as the perihelion advance of planet can also be explained in terms of the orthogonality.

physics.gen-ph↗
arXiv2004

An advance report on particle invariance in particle physics

Since particle such as molecule, atom and nucleus are composite particle, it is important to recognize that physics must be invariant for both the composite particle and its constituent particles, this requirement is called particle invariance. But difficulties arise immediately because for fermion we use the Dirac equation, for boson we use the Klein-Gordon equation. Therefore, the particle invariance demands there is a general wave equation for describing particle motion regardless particle class. In this paper, three advances in this subject are reported: (1) momentum-wavefunction relation is a general relation shared by both fermion and boson, meets the requirement of the particle invaiance. As a test, the momentum-wavefunction relation was directly applied to hydrogen atom, and get the correct fine structure and spin effect for the electron. (2) the Dirac equation and Klein-Gordon equation can be derived out from the momentum-wavefunction relation when we abandon some higher order terms. (3) according to the momentum-wavefunction relation a path integral method was developed, differing from Feynman's path integral, it simplfies quantum computation.

physics.gen-ph↗
arXiv2004

The novel aspect of hydrogen atom: the fine structure and spin can be derived by single component wavefunction

The fine structure of hydrogen energy was calculated by using the usual momentum-wavefunction relation directly, rather than establishing the well-known Dirac wave equation. As the results, the energy levels are completely the same as that of the Dirac wave equation, while the wavefunction is single component that is quite different from Dirac's four component wavefunction, the most important thing is that the present calculation brings out electronic spin in a new way which has never been reported and indicates that the electronic spin is a kind of orbital motion.

physics.gen-ph↗
arXiv2002

Relativistic mechanism of superconductivity

According to the theory of relativity, the relativistic Coulomb's force between an electron pair is composed of two parts, the main part is repulsive, while the rest part can be attractive in certain situations. Thus the relativistic attraction of an electron pair provides an insight into the mechanism of superconductivity. In superconductor, there are, probably at least, two kinds of collective motions which can eliminate the repulsion between two electrons and let the attraction being dominant, the first is the combination of lattice and electron gas, accounting for traditional superconductivity; the second is the electron gas themselves, accounting for high $T_c$ superconductivity. In usual materials, there is a good balance between the repulsion and attraction of an electron pair, the electrons are regarded as free electrons so that Fermi gas theory plays very well. But in some materials, when the repulsion dominates electron pairs, the electron gas will has a behavior opposite to superconductivity. In the present paper the superconducting states are discussed in terms of relativistic quantum theory in details, some significant results are obtained including quantized magnetic flux, London equation, Meissner effect and Josephson effect.

physics.gen-ph↗
arXiv2002

The particle invariance in particle physics

Since the particles such as molecules, atoms and nuclei are composite particles, it is important to recognize that physics must be invariant for the composite particles and their constituent particles, this requirement is called particle invariance in this paper. But difficulties arise immediately because for fermion we use Dirac equation, for meson we use Klein-Gordon equation and for classical particle we use Newtonian mechanics, while the connections between these equations are quite indirect. Thus if the particle invariance is held in physics, i.e., only one physical formalism exists for any particle, we can expect to find out the differences between these equations by employing the particle invariance. As the results, several new relationships between them are found, the most important result is that the obstacles that cluttered the path from classical mechanics to quantum mechanics are found, it becomes possible to derive the quantum wave equations from relativistic mechanics after the obstacles are removed. An improved model is proposed to gain a better understanding on elementary particle interactions. This approach offers enormous advantages, not only for giving the first physically reasonable interpretation of quantum mechanics, but also for improving quark model.

hep-th↗
arXiv2002

To string together six theorems of physics by Pythagoras theorem

In this paper, we point out that there are at lest six theorems in physics sharing common virtue of Pythagoras theorem, so that it is possible to string these theorems together with the Pythagoras theorem for physics teaching, the six theorems are Newton's three laws of motion, universal gravitational force, Coulomb's law, and the formula of relativistic dynamics. Knowing the internal relationships between them, which have never been clearly revealed by other author, will benefit the logic of physics teaching.

physics.gen-ph↗
arXiv2001

Quantization of Chaos for Particle Motion

We propose a formalism which makes the chaos to be quantized. Quantum mechanical equation is derived for describing the chaos for a particle moving in an electromagnetic field.

physics.gen-ph↗
arXiv2001

A Method for Deriving the Dirac Equation from the Relativistic Newton's Second Law

The derivation becomes possible when we find a new formalism which connects the relativistic mechanics with the quantum mechanics. In this paper, we explore the quantum wave nature from the Newtonian mechanics by using a concept: velocity field. At first, we rewrite the relativistic Newton's second law as a field equation in terms of the velocity field, which directly reveals a new relationship connecting to the quantum mechanics. Next, we show that the Dirac equation can be derived from the field equation in a rigorous and consistent manner.

quant-ph↗
arXiv2001

The Origin of the Planck's Constant

In this paper, we discuss an equation which does not contain the Planck's constant, but it will turn out the Planck's constant when we apply the equation to the problems of particle diffraction.

quant-ph↗