Physics Animal Star - Schrödinger's Cat

There was an interesting piece of political news in Taiwan a while ago about the existence of a tracker for presidential candidate Han Kuo-yu. The city officials answered between "yes" and "no", which made Taiwanese netizens immediately think of "Xue Xue". "Dinger's cat", a cat whose state is "dead and alive", today we will discuss an interesting and classic problem in quantum mechanics "Schrödinger's cat"!

When it comes to quantum mechanics, we know that quantum has the property that its position cannot be determined, that is, the uncertainty principle of quantum mechanics. This is due to the fact that quantum has two properties of "wave" and "particle". Congratulations, you are on the same side as Einstein and Schrödinger. Einstein was also unable to accept this feature of quantum mechanics in his life, and even published an article questioning the incompleteness of quantum mechanics, and Schrödinger is quite One of his scientists, in order to embarrass quantum mechanics, Schrödinger proposed a hypothetical experiment, put a cat in a box, and the box is designed with a device that has a 50% chance of emitting a lethal gas, then in In this case, as long as there is no observation, it is a cat that is both dead and alive. Schrödinger said: Isn't this a ridiculous thing?

However, this choking has made the cat enter an infinite circle of life and death discussions, and also made the cat a star beast in the physical world, and can even be used in various fields (you can also know this from the politics I mentioned at the beginning. The cat is so powerful), and this state of being both dead and alive is the so-called "superposition state". The superposition state is not a nonsense, but a rigorous mathematical derivation. Therefore, before we understand quantum, we must first understand the intuition Throwing it aside, let’s make up our minds to first agree that quantum has the property of uncertainty, so that we can continue to study and discuss.

In fact, microscopic quantum mechanics is difficult to understand with our macroscopic physical concepts, and we cannot observe the entire motion process, because in the state of quantum, the observation itself will have an impact. We can only know that in the state of quantum, when we have not observed the object, it is a state of superposition. For example, electrons have spin down and spin up at the same time, and only when we observe, can we determine the current state of observation, Here we return to Schrödinger's cat for discussion. Under the description of quantum mechanics, we can only determine whether the cat is dead or alive when we open the box and observe. When we observe, the cat is in a state of death. alive again.

Finally, I would like to introduce a hypothesis, which is very interesting. In the previous article on quantum computers, I mentioned parallel universes. Dead is also alive, but the moment we open the box, we create the result of two parallel universes, a reality where the cat is alive, and a reality where the cat is dead, and the quantum state is the one that connects the parallel universes State, this may allow everyone to better understand, after all, everyone has seen Marvel's Avengers, and it also explains why the quantum field can go back to the past and travel through time and space, in fact, it can be regarded as an interpretation of a parallel universe.

In the end, if you still don't understand, don't worry, when you think you don't understand, you start to enter quantum mechanics.