Question

a) what is simple quantum mechanics?
b) what is wave function?

Answer 1

Answer on Question #61594, Physics / Quantum Mechanics

a) what is simple quantum mechanics?

b) what is wave function?

Solution:

a) what is simple quantum mechanics?

Quantum mechanics is the branch of physics, which describes the quantum systems and the laws of their motion. Difference between a quantum system from the classical system: action (an attribute of the dynamics of a physical system from which the equations of motion of the system can be derived) in quantum system compared to the Planck constant ( $h = 6,626 \times 10^{-34} \, \text{J} \times \text{s}$ ).

In classical mechanics, objects exist in a specific place at a specific time. However, in quantum mechanics, objects exist in a haze of probability; they have a certain chance of being at point A, another chance of being at point B and so on.

b) what is wave function?

A wave function $\psi(x, y, z, t)$ is a description of the state of a quantum system. It can help to calculate all the measured physical characteristics of the system, the probability of her stay at a certain point in space and evolution in time. The wave function can be found by solving the Schrödinger wave equation.

The physical meaning of the wave function: the value $|\psi(x, y, z, t)|^2 dV$ is proportional to the likelihood that a particle will be detected at time $t$ in the volume $dV$ in the neighborhood of point $(x, y, z)$.

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