Quantum is a physics concept that refers to the basic unit of matter that has different behaviors from traditional physics. The behavior of a quantum is affected by what is known in quantum mechanics as a "quantum state." These quantum states can describe the behavior of a quantum in different situations. Important concepts in quantum physics include: 1. Wavelet-particle Dualism: Quantum systems exhibit the characteristics of both particles and waves. 2. Superposition state: The quantum system is in a state of superpositions of multiple states. It will not fall into a certain state until it is measured. 3. Entanglement: There is a special connection between two or more quantum systems. When one of the systems makes a measurement, the state of the other system will immediately change, even if the distance between them is very far. 4. Quantum tunnelling effect: The phenomenon that quantum systems can pass through obstacles through small physical distances is called quantum tunnelling effect. 5. Quantum teleportation: Quantum systems can transmit information between two or more systems through information transmission. This phenomenon is called quantum teleportation. Quantum physics is a discipline that studies quantum phenomena and the behavior of quantum systems. It is important for understanding modern technologies such as quantum computing and quantum communication.