(Foreword)

Your encounter with him is an encounter of fate.

(Text)

March 30, 2021 at 13:30 p.m

"Hah...... Ha...... Cheng Yin, Cheng Yin, you don't want to be like this, hurry up and give it back to me, give it back to me~ You scoundrel! Yan Xiaoxue lay on the table next to me like a pig, drooling and shouting in her dreams.

I looked around, and everyone around me was looking at us, snickering. I hurriedly pushed her shoulder with my hand and whispered in her ear:

"Hey, it's at the lecture now, wake up, wake up."

But she just waved her hand casually, turned her face, turned her head and continued to sleep like a pig.

I sighed helplessly.

If it weren't for the fact that she finally asked her classmate to borrow a student ID card from HKUST, which allowed me to experience the learning atmosphere here in advance, I am afraid that I would have been unable to hold back and beat her wooden fish head that had already slept like a pig's head.

I looked around again, and then fixed my eyes on the words on the electronic screen on the side:

On the Physical Principles of Quantum Mechanics and a Brief History of Its Development

Professor: Wu Yitao

I shook my head.

Forget it, after all, she's just a girl, and these complex theories must be as profound and incomprehensible to her as astronomical numbers, right?

I smiled, propped my head up with one hand, and watched Professor Wu's direction as I listened carefully to his speech.

I saw that he clicked on the electronic screen with an infrared remote control pen, and the picture on the electronic screen immediately switched to the mode of PPT slide.

He looked at the words on the PPT and explained to us:

"Ladies and gentlemen, what I want to talk about today is a brief history of some basic physical theories of quantum mechanics and its development.

First of all, I would like to ask all of you who know what quantum mechanics is. What exactly is quantum mechanics? ”

The previously noisy classroom suddenly became silent.

It seems that Professor Wu's opening is not much different from that of an ordinary teacher. How can any student volunteer to stand up and talk again. I turned the ballpoint pen in my hand and waited for Professor Wu to explain himself.

Sure enough, Professor Wu looked around and said, "Okay, since everyone is so humble. So I'll start with a brief explanation of what quantum mechanics is. I think that all students on the Internet, you will find it casually:

[1] Quantum mechanics, (its English name: Quantum Mechanics) is a branch of physics that studies the motion laws of microscopic particles in the material world, mainly studying the basic theory of the structure and properties of atoms, molecules, condensed matter, as well as atomic nuclei and elementary particles, which together with the theory of relativity constitute the theoretical basis of modern physics.

Quantum mechanics is not only one of the basic theories of modern physics, but also widely used in disciplines such as chemistry and many modern technologies.

At the end of the 19th century, it was discovered that the old classical theories could not explain microscopic systems, so through the efforts of physicists, quantum mechanics was created in the early 20th century to explain these phenomena. Quantum mechanics has fundamentally changed our understanding of the structure of matter and its interactions. With the exception of gravity, which is described by general relativity, all fundamental interactions to date can be described within the framework of quantum mechanics (quantum field theory) [1] ......"

I didn't expect this quantum mechanics to sound so boring. I looked around, and in less than half an hour, a third of my classmates had already left their seats. The classrooms that were full before suddenly seemed to be a lot empty, and it seemed that they were all here for a roll call.

Seeing that, Professor Wu didn't seem to care at all. The student walked in front of him with a bag on his back, and he also explained the content on the PPT as if nothing had happened.

But there was one thing that caught my attention. It's a few gringos in suits sitting at the front. Those gringos, blonde and blue-eyed, were tall. Especially the one sitting in the middle, while listening attentively to Professor Wu's explanation, he was talking to the people next to him from time to time. This is probably not the student here. I felt strange in my heart.

Professor Wu continued to speak passionately.

I just heard him extend the principles of quantum mechanics to particles, and talk about waves:

[1] Quantum mechanics is a theory of physics that describes the atomic and subatomic scales. This theory was formed in the early 20th century and revolutionized people's understanding of the composition of matter. In the microcosm, particles are not billiard balls, but buzzing probabilistic clouds that do not exist in more than one location and do not travel from point A to point B through a single path. According to quantum theory, particles often behave like waves, and the "wave function" used to describe the particle's behavior predicts the possible properties of a particle, such as its position and velocity, rather than deterministic properties. Some of the weird concepts in physics, such as the principle of entanglement and uncertainty, have their roots in quantum mechanics.

Hugh Everett III's many-worlds interpretation holds that all the possible predictions made by quantum theory come true at the same time, and these realities become parallel universes that are generally unrelated to each other. In this interpretation, the total wave function does not collapse, and its development is decisive. But since we, as observers, cannot exist in all parallel universes at the same time, we only observe measurements in our universe, and parallels in other universes we observe measurements in their universes. This interpretation does not require special treatment for measurements. The Schrödinger equation in this theory is also the sum total of all parallel universes. 【1】……”

Minute by minute. I looked at my watch, it should be almost over.

Professor Wu's PPT is finally about to turn to the last one. Many students are stretching their waists, sorting out the books on the table, taking notes, and so on.

"Okay, students, that's all for today's presentation. I am very happy that so many students can listen to my lecture, and I don't know if any of them have any questions or opinions about my lecture today. Now let's talk about it. Professor Wu closed the laptop on the podium.

Damn, how can there be a student union asking questions. I don't have to think about it, and the question that the students here want to think about most now is what to eat for lunch after the lecture. I was trying to wake up Yan Xiaoxue, who was sleeping soundly next to me. But a deep, powerful voice suddenly startled me.

I'm looking around for the source of the sound. The gringo sitting in the front stood up.

Speaking fluent Chinese; "Professor Wu, you said so much, I think it's just talk on paper!!

[1] ——Excerpt from Baidu Encyclopedia "Quantum Mechanics"