What quantum theory contains, the basic concept of quantum theory

Quantum mechanics contains a lot of content, if you don't study physics, it is the general physics of the university that talks about very little content, just to make an introduction, the content has wave function, probability density, Schrödinger equation, one-dimensional potential well problem, one-dimensional square potential, and the Schrödinger equation of hydrogen atoms, Schrödinger equations can satisfactorily solve the energy level of hydrogen atoms and the related problems of light, and now only the situation of hydrogen atoms can be solved, and other multi-electron atoms are too complicated. It is impossible to understand quantum mechanics in the second year of high school, the Schrödinger equation requires the knowledge of advanced mathematics, such as partial derivatives and higher derivatives, if you want to solve this equation, you need more knowledge, you still need to learn the knowledge in your books now, and you will also talk about these things in college in the future.

There's a lot of calculus involved.

If you want to do the problem, the math in the second year of high school is definitely not enough.

If you just want to popularize science, please ignore my words.

The content in it is very different from classical physics, and it mainly studies the laws of microscopic particles.

The basic content of quantum mechanics.

The basic principles of quantum mechanics include the concept of quantum states, the equations of motion, theoretical concepts, and the corresponding rules and physical principles between observed physical quantities.

In quantum mechanics, the state of a physical system is represented by a state function, and an arbitrary linear superposition of state functions still represents a possible state of the system. The change of state over time follows a linear differential equation that predicts the behavior of a system, and the physical quantities are represented by operators that represent certain operations that meet certain conditions; The operation of measuring a physical quantity of a physical system in a certain state corresponds to the effect of the operator representing that quantity on its state function; The possible value of the measurement is determined by the eigenequation of the operator, and the expected value (mean) of the measurement is calculated by an integral equation containing the operator.

The square of the state function represents the probability of occurrence of a physical quantity as its variable. Based on these basic principles and accompanied by other necessary assumptions, quantum mechanics can explain various phenomena of atoms and subatoms.

The state function satisfies the Schrödinger wave equation, and the quantization problem of classical physical quantities boils down to the solution of the Schrödinger wave equation.

Basic Methods of Quantum Mechanics:

1): Write the Hamiltonian h (i.e., kinetic energy plus potential energy in classical mechanics) of the classical system corresponding to the quantum system.

2): Quantize (i.e., quantize) the Hamiltonian operator to obtain the Hamiltonian operator h.

3): The Hamiltonian operator h is substituted into the stationary Schrödinger equation to solve, and the eigenfunction system and eigenvalue are obtained. If the exact solution cannot be found, perturbation theory or variational method can be applied.

4): If the wave function evolves with time, then the superposition coefficient is obtained by substituting the wavewave function into the Schrödinger equation according to the eigenfunction system that has been calculated. The meaning of the square of the superposition coefficient cn is the probability that the state (quantum state) of the system will transition to the eigenstate n when the system is observed at time t.

As the LS and the two said, it is impossible to understand quantum mechanics in the second year of high school, and you must have a certain amount of mathematical knowledge, including ordinary differential knowledge, and in addition to this, you must have a certain knowledge of matrices, etc., which must be systematically studied after going to university. In addition, it is only in the Department of Physics that there is an opportunity to study quantum mechanics in a really comprehensive and systematic way

The basic concept of quantum theory is that if there is the smallest indivisible basic unit of a physical quantity, then the physical quantity is quantized, and the smallest unit is called quantum.

In the Newtonian mechanics (or classical mechanics) system, the absorption and release of energy is continuous, and matter can absorb any amount of energy. Later, it was found that in fact, the real absorption and release of energy can only be absorbed and released one by one with a certain order of magnitude (hv) as the smallest unit, h is the most commonly used Planck constant in quantum mechanics, and v is the electromagnetic frequency.

Since Planck's constant is of the order of magnitude small (-34 orders of magnitude of 10), Newtonian mechanics agrees well with experiments on large scales, but deviates greatly on small scales. Therefore, Schrödinger established the Schrödinger equation on the basis of Planck's quantum theory (the transfer of energy one by one), thus opening up the beginning of quantum mechanics.

Quantum mechanics is a physical theory that describes microscopic matter, and together with the theory of relativity, it is considered to be the two fundamental pillars of modern physics, and many physical theories and sciences such as atomic physics, solid state physics, nuclear physics, and particle physics, as well as other related disciplines, are based on quantum mechanics.

Quantum mechanics is a sub-discipline of physics that studies the motion laws of microscopic particles, which mainly studies the basic theory of atoms, molecules, condensed matter, as well as the structure and properties of atomic nuclei and elementary particles.

Quantum theory is a fundamental theory that describes the behavior of the microscopic world, and its basic concepts include:

1.Quantum state: The state of a physical system can be described by a complex vector, called a quantum state. In quantum mechanics, a quantum state contains all the information about the system.

2.Quantum superposition states: When a physical system is in between multiple possible states, these states can be described by a linear combination, known as quantum superposition states.

Quantum superposition states have some peculiar properties, such as when we measure a system in a superposition state, it will only collapse to one of these states with some probability.

3.Quantum measurements: Quantum measurements are an important concept in quantum mechanics that describes what happens when we take measurements of a quantum system. In quantum mechanics, measurements cause quantum states to collapse into a deterministic state.

4.Uncertainty Principle: The uncertainty principle in quantum mechanics states that we cannot know exactly the position and momentum of a particle at the same time. This means that we can only behave to a certain extent, not precisely.

5.Quantum entanglement: When two or more physical systems are in a state of interconnectedness, they are known as quantum entanglement. This correlation plays an important role in quantum communication and quantum computing.

The explanation of the term quantum theory is that quantum theory is one of the two cornerstones of modern physics.

The explanation of the words of quantum theory is: quantum theory is one of the two cornerstones of modern physics, and the part of speech is: the structure of the word is:

量 (upper and lower structure) 子 (single structure) theory (left and right structure) Zhuyin is: 一 Pinyin is: liángzǐlùn.

What is the specific explanation of quantum theory, we will introduce it to you through the following aspects:

Idioms about quantum theory.

On the thousands of arguments, the ratio of the same view, the bucket of the bucket, the amount of the car.

Words about quantum theory.

Measure the amount of money, buy the amount of strength, and for the ten Hu measure beads, the difficulty of measuring the weight, the weight of the weight, the weight of the salary, the bucket, the measure of the basket, such as the river and the sea, do not know the measure of the baht, measure the inch.

Sentence formation on quantum theory.

1. The failure of the particle model in relativity, quantum theory and field theory should naturally lead to the failure of the concept of "instantaneous".

2. The old quantum theory is based on classical theory and uses the concept of "orbital" to describe the movement of electrons in atoms.

3. However, although the correctness of quantum theory has been well confirmed in the production of daily necessities, many people ignore its broader and more astonishing mysteries.

4. Do you know who pioneered quantum theory?

5. People don't know how big the universe is on the other side of the Milky Way, and radiant energy, relativity, and quantum theory are even more unthinkable.

Quantum theory is a physical theory that describes the microscopic world and is used to describe the behavior of matter and energy at extremely small scales. The theory is based on a set of mathematical rules and experimental observations that can describe the motion and interaction of microscopic particles such as atoms, molecules, and elementary particles such as electrons, protons, and neutrons.

In quantum theory, the behavior of microscopic particles has some non-classical properties, such as wave-particle duality, quantum superposition states, uncertainty principle, etc. These properties have led to some amazing phenomena, such as quantum tunneling, quantum entanglement, etc.

The development of quantum theory began in the early 20th century, and after the efforts of several generations of physicists, it has gradually become one of the core theories of modern physics. It has a wide range of applications in fields such as quantum computing, quantum communication, quantum cryptography, and so on.