Two days on weekends, Evan went to the laboratory and helped to check and calibrate the experimental equipment, especially the ammeter, oscilloscope and other instruments several times.

Avan’s custom plastic parts won’t arrive next Thursday.

The gold foil that Leiden is responsible for will not be ready next Tuesday.

A new week begins.

Because of distracting experiments, Evan was distracted several times in the morning class.

On Monday afternoon, in Professor Carl Anderson's Theoretical Physics class, the professor talked about the history of the development of atomic structures on the podium with splashing saliva. He started with the Dalton solid model in 1803, to the jujube cake model proposed because of the discovery of electrons, to the planetary model proposed by Rutherford due to the results of the α-particle bombardment experiment, and Bohr improved quantum orbit model based on the planetary model, and finally to the electron cloud model proposed based on the uncertainty principle in quantum mechanics.

Then, Carl followed the trend and talked about some basic concepts of quantum mechanics.

"Quantum mechanics is a theory that describes the microscopic world. It represents a quantum system with quantum states. The evolution of quantum states of an isolated quantum system over time obeys the Schrödinger equation..."

"According to Born, the description of quantum systems is probabilistic, and the probability of an event occurring is the solution to the Schrödinger equation - the square of the absolute value of the wave function..."

"In a quantum system, the position and momentum of a particle cannot be determined at the same time..."

"The above theory is called the Copenhagen interpretation of quantum mechanics..."

"In Copenhagen interpretation, every measurement of the wave function will inevitably lead to the collapse of the wave function, and the unmeasured eigenvalue will be deleted..."

When Professor Anderson talked about this, he suddenly saw Evan sitting in the first row shaking his head, and habitually called out: "Evan, do you shake your head, do you think there is something wrong with what I am talking about here?"

Suddenly being named, Evan, who was distracted, did not listen to Professor Quan's questions, but he still winked at Rick, who was sitting next to him, and stood up calmly and slowly.

Rick understood and whispered as fast as he could: "collapse!"

Just one word, what the hell is this!

Evan was calm on his face, but he complained loudly in his heart.

However, when he stood up, he had to say something.

Collapse, what collapse... What collapse can it be related to quantum mechanics?

It must be the wave function collapses, is it possible or does the black hole collapse?

After thinking about the key, after pausing for a while, he pretended to be organizing the language and finally spoke: "Professor, I think the wave function can not collapse."

Evan spoke as soon as he opened his mouth, which shocked everyone, including the professor. The students opened their mouths in surprise, and then the class immediately became extremely noisy.

Someone was surprised and said, "What is Evan trying to do? Do you want to challenge the entire Copenhagen school?"

Someone whistled and said, "Wow! It's true that he is the chief among the freshmen. He has strong abilities and his ideas are not ordinary and imaginative."

After last week's class, Evan became a celebrity in this class, and almost no one didn't know him.

Professor Anderson clapped his palms and made the class quiet again.

"Evan, you have a bold idea. Can you tell me?"

Professor Anderson likes students to come up with new ideas, which is better than not even if the idea seems unreasonable at first glance.

Evan nodded and slowly said his point of view: "About the concept of wave function collapse in Copenhagen's interpretation, Dr. Schrödinger's thought experiment is very vivid. I wonder if you have heard of it... Just pretend that you haven't heard it!"

"This experiment is like this: put a cat in a box, which is equipped with radioactive substances, Geiger counters and gas buckets. Suppose that during a period of time, radioactive substances have a 50% chance of emitting a particle, and a 50% chance of remaining unchanged. Assume that any particles emitted by radioactive substances can be detected by Geiger counters. During this period of time, if Geiger counters detect any radioactive particles, the mechanism of gas release by the gas bucket will be activated, releasing poison gas to poison the cat in the box; if the radioactive substances remain unchanged, then the cat will still be alive.

It is obvious that in this experiment, according to the principle of quantum mechanics, at time T, the result will be a living cat and a dead cat that each account for half the probability, and these two states are mixed together. When the observer lifts the lid, he can finally determine that the cat inside is dead or alive. The result will only be one. In a sense, if the cat is dead, it can be said that the cat was killed by the observer's observation action. This is the collapse of the wave function."

"But if we add a hypothesis - assuming that the world is not unique, and that there are countless worlds outside our observable range, and our world is just one of them, then we can explain the Schrödinger experiment in this way. The results we observe, whether dead cats or living cats, are just the results of our world. Maybe in our world, cats are dead, but in other worlds, I will call it parallel worlds, and cats are alive."

"In this way, the description function of the cat is dead and alive does not collapse."

"We can call this interpretation 'multi-world interpretation'..."

...

Evan became famous. This time, he was no longer limited to the circle of freshmen and teachers, but was known to the entire college in the shortest time.

What spread along the way was his "multi-world interpretation".

For a time, Evan became the number one star in the college. No matter where he went, students or teachers would talk to him, or wanted to ask for advice, or simply expressed his admiration. The dormitory was a hardest hit area. At night, students from four communities gathered at BlackerHouse and asked Evan to teach "multi-world interpretation" and then discuss the rationality or unreasonableness of this theory together. Evan, who was very upset, even thought about whether to disappear for a while and wait for the limelight to pass.

In fact, in theory, "multi-world interpretation" is almost like "Schrödinger's Cat" a theory that is almost thought-based, because we have almost no way to observe the existence of other worlds.

Traditional physicists do not like this interpretation and believe that it is more like a science fiction concept than a theory (in fact, the concept of parallel worlds does bring a lot of inspiration to science fiction writers).

But many students with no fixed mindset regard this theory as a guideline, because countless worlds are more popular than collapse.

Countless worlds mean countless possibilities.

Among these students who believe in multi-world interpretation, Rick Taft, who was sitting next to Evan at the time, was undoubtedly the most determined one.

"Evan, think about it again, if the parallel world exists, what evidence can prove it."

"Is it possible for people in parallel worlds to cross the boundaries between worlds and go to another world?"

Evan, who was so annoyed by him, suddenly had a whim: "I don't know these, but I certainly can't rule out this possibility. Otherwise, you can set up an organization to find these existences that span the world, well, just call them Planes Walker, right?"

I encourage others to build an organization with my own goal, I hope I am not trying to die...
Chapter completed!