Why does quantum mechanics break the concept of mechanical determinism?

Mechanical determinism is a copy of classical mechanics.

It can be said that Newton's law of universal gravitation, Maxwell's electromagnetic theory and Einstein's theory of relativity all belong to classical mechanics.

Classical mechanics pays attention to the absoluteness of object motion,

According to the present situation, it is entirely possible to infer what happened in the past.

What will happen in the future.

Mechanical determinism, as the name implies,

It is pointed out that everything can be obtained by mechanical calculation.

But quantum mechanics completely subverts some realities of classical mechanics.

As can be seen from the comparison between relativity and quantum mechanics,

They all claim to be universal,

But when they are combined into one, as a calculation equation,

But this will only lead to meaningless results.

Can't say which one is wrong, they are all right, but the scope of application is different.

Quantum mechanics is generally used for sizes or masses larger than Planck unit and smaller than molecular range.

And the calculation of quantum mechanics is not absolute' what was in the past' or' what will happen'.

Quantum mechanics will only get a' probability', which is different from the probability in classical probability.

He will give every possible' event' a possibility.

Relativity is more absolute than quantum mechanics. It can even be said that,

His theory defines the world as' uniqueness', that is, inevitability.

His calculation of mass and volume also proved his correctness.

In fact, quantum mechanics is also useful in the macro aspect.

But for some reason, we can't study the uncertainty of large objects.

Now many physicists will regard the theory of relativity as a part of quantum mechanics.

Let's talk about how quantum mechanics breaks mechanical determinism.

The most basic principle of quantum mechanics is' volatility', which means what we observe is' uncertainty'.

Different from the completely inevitable world of classical mechanics, the world stipulated by quantum mechanics is completely' uncertain'.

Take a classic experiment "double-slit experiment" as an example,

Particles are washed out by the particle emitter, and there is a baffle with two vertical slits in front of the emitter.

The particle will definitely pass through a vertical seam, but you don't know when it will pass.

At this time, classical mechanics will say, whether you know it or not, particles will always pass through a crack.

And quantum mechanics will, if you don't know which one it will pass through, then the particle will pass through two vertical slits.

This may be an extreme statement, but it does not affect our understanding of the' uncertainty' of quantum mechanics.

Because according to the theory of quantum mechanics, the' probability wave' of this particle does pass through two vertical slits.

This particle has been in the uncertain state of the Schrodinger cat until you observe it.

This is the essential difference between' quantum mechanics' and' mechanical determinism'.