What is Quantum Theory? What is quantum theory?

Quantum theory means that if there is the smallest indivisible fundamental 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.

The English word for quantum is quantum, derived from the Latin word quantus, which originally means "how much". Quantum is now a physical term, and it is the minimum excitation of a field.

For example, the minimum excitation of an electromagnetic field is a photon, i.e., the quantum of an electromagnetic field is a photon. All elementary particles are quanta of a certain field (minimal excitation). In addition to photons, these quanta (minimal excitation) also include electrons, quarks, neutrinos, gluons, etc.

Protons are not quanta because protons are composite particles made up of quarks.

In the same way, the hydrogen atom is not quantum. Planck was the first to discover this fundamental law of nature in 1900, when he discovered that the energy of light must be evenly divided into components according to a minimum unit.

Overview: Quantum theory is one of the two cornerstones of modern physics. Quantum theory provides us with new ways of expressing and thinking about the natural world. Quantum theory reveals the basic laws of the microscopic material world and lays a theoretical foundation for atomic physics, solid state physics, nuclear physics, and particle physics.

It can explain the structure of atoms, the regularity of atomic spectrum, the properties of chemical elements, the absorption and radiation of light, etc.

In the same way, the hydrogen atom is not quantum. Planck was the first to discover this fundamental law of nature in 1900, when he discovered that the energy of light must be evenly divided into components according to a minimum unit.

Quantum is a concept commonly used in physics to refer to an indivisible fundamental entity. The concept of quantum was first proposed by the German physicist M. Planck in 1900, and was perfected by Einstein, Bohr, Schrödinger and others, and a complete theory of quantum mechanics was initially established in the first half of the 20th century. The vast majority of physicists view quantum mechanics as a fundamental theory for understanding and describing nature.

In the quantum realm, there is also the concept of time, and the variables in its wave function are time and space coordinates. The reason for the quantum uncertainty is that quantum mechanics does not know that the de Broglie wave of the quantum stems from the action of the field on the quantum, and its uncertainty is the result of the joint action of the radiation field and the field of the quantum, and the magnitude of the radiation field is determined that the trajectory of the quantum is determined.

Definition. If there is a smallest indivisible fundamental unit of a physical quantity, then the physical quantity is quantized, and the smallest unit is called quantum. The English name quantum comes from the Latin word quantus, which means "how much" and means "a considerable amount of a certain matter".

The concept of quantum is commonly used in physics to refer to an indivisible fundamental entity. For example, the "quantum of light" (photon) is the basic unit of energy of light of a certain frequency. The extended quantum mechanics and quantum optics have become different professional research fields.

The basic concept is that all tangible properties are "quantizable". "Quantization" means that the numerical value of its physical quantity is discrete, rather than continuously arbitrarily taken. For example, in an atom, the energy of an electron is quantizable.

This determines general issues such as the stability of the atom and the emission spectrum. The vast majority of physicists view quantum mechanics as a fundamental theory for understanding and describing nature.

In layman's terms, a dust quantum is the smallest unit that can exhibit the properties of a substance or physical quantity.

Quantum refers to the smallest fundamental unit of energy in physics. In classical physics, energy can change continuously, while quantum theory holds that energy is discrete, and is transferred in units of "quanta" at fixed intervals. The implication is that there are minimized basic units in the physical world, and only integer multiples of "quanta" can be transferred.

The concept of quantum was first proposed by the German physicist Planck in 1900 and formed the basis of quantum mechanics. The theory of quantum mechanics depicts the behavior of matter in the microscopic realm, in which other laws of physics are inapplicable. For example, electrons, photons and other particles exhibit quantum phenomena, such as quantum superposition states, quantum entanglement, etc., which cannot be explained in classical physics.

At the same time, quantum is also a basic concept to describe "interaction", which completely subverts the inherent physical concepts in classical physics and is an important foundation of modern science and technology.

In recent years, the concept of "quantum" has also been widely used in different fields, such as quantum computing, quantum communication, quantum sensing, etc. These fields have taken advantage of some of the properties of quantum theory and opened up new research directions and technical applications.

Quantum is an important concept of modern physics and a physical quantity, if or the existence of the smallest indivisible basic unit, then the physical quantity is quantized, and the smallest unit is called quantum, the concept of quantum is commonly used in physics, is an indivisible basic individual, the quantum hypothesis put forward a powerful impact on classical physics, promote physics into the microscopic level to lay the foundation, modern physics quantum physics is a discipline that studies the laws of microscopic particle motion.

Quantum is just a lot of numbers, a bunch.

1. The definitions are different. Quantum: If there is the smallest indivisible fundamental unit of a physical quantity, the physical quantity is quantized, and the smallest unit is called quantum. Whereas, a particle refers to the smallest component of matter that can exist in a free state.

2. The time of submission is different. Quantum discovery predates particles. Quantum was first proposed by the German physicist Planck in 1900.

In 1897, Thomson discovered the electron, and in 1911, Rutherford proposed the nuclear structure of the atom. Then we discovered photons, and thought that "photons, electrons, protons, and neutrons" were indivisible particles that made up matter, so we called them "elementary particles."

3. The scope of the field is different. Quantum is a fundamental unit, and particle is a substance. Quantum stands for "a considerable amount of matter".

Atoms, on the other hand, are the smallest particles that make up matter. After the discovery of electrons, protons, and neutrons, many people believed that photons and them were the "elementary particles" that make up matter.

Quantum interpretation.

1) [quantum]

2) One of the smallest increments or fractions, into which many forms of energy are branched and often directly or indirectly associated with the frequency v, while the total isoZen number is shrouded by Planck's constant multiplied by v (3) A small fraction of the value of quantum physical quantities (e.g., molecular spin, angular velocity, magnetic moment) Detailed explanation In the microscopic realm, the transformation of certain physical quantities is carried out in leaps and bounds in the smallest unit, not continuous, and this smallest unit is called quantum.

Word decomposition Explanation of quantity Quantity á Instrument for determining, calculating, measuring the number, length, height, depth, distance, etc. of things: measuring tools. Measuring cup.

Graduated cylinder. Protractor. I determine, measure it with a measuring instrument or other thing that is a standard

Measure. Measurement. Measurement.

Take your temperature. Estimating, speculating: estimating.

Consider. Think. Explanation of Quality Zi 子 ǐ In ancient times, it referred to children, but now it refers specifically to sons

Children. Offspring. Heir.

Children (juniors, young people). Fruits, seeds of plants: rapeseed.

Melon seeds. Zishi. Eggs of animals:

Roe. Silkworms. Young, small:

Chicken. Newborn animal. Sub-city.

Small, hard, granular stuff: *

Today's development of quantum technology is having a subversive impact on traditional technology and will lead to a new round of scientific and technological revolution and industrial transformation. So what is quantum theory ? What is quantum technology?

In the book "The History of Quantum Physics", it is written:

The story of quantum theory is like a legend, starting from an inconspicuous clue, winding paths, and gradually falling into colorful and dazzling eyes. When I was in a clueless place, suddenly the peaks and loops turned, the world was open, like a river flowing out of the underground, a flood of oceans, but before I had time to see the beautiful scenery, in the blink of an eye, it was up and down, and I strayed into the depths ......of the white clouds and did not know the way back

Quantum theory is an extremely complex and difficult puzzle to solve. She is like a mysterious girl, we see her every day, but we can never guess her inner world.

It has been more than a century since the birth of the quantum concept, but it is incredible that some of its basic ideas are still unknown to the general public.

On December 14, 1900, quantum emerged from Planck's equation, which is the smallest unit of energy, which is known as Planck's constant, which is equal to about 10-34 joules of seconds.

Quantum technology is based on quantum theory and combined with cybernetics, computer science, and electronic methods in engineering to achieve effective control of quantum systems.

The development of quantum science and technology is of great scientific significance and strategic value. I have listed quantum informatics as a key goal of the 13th Five-Year Plan and the "Made in China 2025" plan, and is the first country to build a quantum science satellite "Micius" and the first country to build a quantum network.

the application of quantum theory will bring earth-shaking changes to our lives . It has become one of the disruptive technologies today and even in the future.