Chapter 24 Junior High School Classmates
May 12th is another weekend.
Xu Qingzhou has already started writing a paper - "On the Application of Euler's Formula in Wave Function Representation".
Euler's formula is an extremely important formula in mathematics, and the wave function is a core concept in quantum mechanics, used to describe the state of microscopic particles (such as electrons, atoms, etc.).
He found a trick. This was a method he used to like to use, but since he had published many papers and books, his focus was basically on quantum mechanics, so he did not make a corresponding summary.
Outside the library.
Xu Qingzhou leaned against the wall and puffed out mist.
This is a habit I have developed over the past ten years. When doing experiments or deducing problems, I would stand outside and smoke a cigarette to relieve fatigue.
Squinting his eyes, he performed function derivation in his mind.
Among them, ∣E and ∣E respectively represent the two energy level states of the system. The complex coefficients C(t) and )C(t) are assigned specific numerical values. Assume that at the initial time t=0, the system is in an equiprobable superposition state.
Finally, by using the properties and operation rules of the exponential function to analyze the evolution of the quantum state over time, well, the derivation part in the middle should be completed. .
In May, the wind is a bit warm at night.
It has just arrived at eight o'clock, and there are many people on the street. Most of them are nearby residents who have just finished eating and went for a walk.
"Xu Qingzhou?"
Halfway through smoking a cigarette, an exclamation suddenly came from behind him.
Thinking he was an acquaintance in Wutong Community, Xu Qingzhou subconsciously wanted to put out his cigarette, but felt something was wrong. He turned around and saw a girl standing in front of him.
She is 1.65 meters tall, wearing a white green flower skirt, with fair skin, revealing two slender white legs. In terms of appearance, although she cannot compare with top beauties like Song Yao, she can definitely be called "delicate and beautiful" .
He looked familiar, but he couldn't remember when he had seen him before. He was definitely not from the community, so he felt relieved. He took a puff of cigarette and asked, "Who are you?"
"I'm Tian Shuang. It's only been three years and you've forgotten me?" The girl was confused.
Huh~
As soon as the other party said this, Xu Qingzhou woke up as if from a dream, and all the memories came flooding back. This girl was his deskmate in the third grade of junior high school. After graduation, she followed her family to go to school in Shanghai.
The memories are recalled, but the memories are not very good.
In junior high school, Xu Qingzhou's personality was as dull, short and ugly as ever, which meant he was good at studying. Tian Shuang often made fun of him.
Tian Shuang looked at the cigarette in Xu Qingzhou's hand with a surprised expression: "Xu Qingzhou, I haven't seen you for a few years, but you actually learned to smoke."
"Well, I like to have one when I'm depressed." Xu Qingzhou replied casually.
"Xiao Tian." At this moment, a boy came over with two bottles of water, looked at Xu Qingzhou warily, helped Tian Shuang unscrew the bottle cap, and asked, "Who is this?" The boy was about the same height as Xu Qingzhou, and as for his appearance, There is a gap between him and Xu Qingzhou.
Tian Shuang took the water and introduced him to the boy: "This is my junior high school classmate. I was his deskmate for a year. At that time, several girls and I liked to tease him."
Hearing this, the vigilance in the boy's eyes suddenly decreased a lot. Just by listening to his tone, he knew that Tian Shuang did not like such a boy.
"Boyfriend?" Xu Qingzhou looked at the boy.
When Xu Qingzhou asked if he was his boyfriend, the boy's eyes lit up and he looked at Tian Shuang expectantly.
"No, my friend, come back with me this time." Tian Shuang shook his head, as if he didn't want to talk more on this topic, "I haven't been back for three years. I didn't expect that Chengdu has changed a lot."
"It's quite big." Xu Qingzhou nodded in agreement.
Tian Shuang sighed and said with emotion: "It's great to meet old classmates. Just now I was still regretting not going to Kyoto Institute of Technology."
"Kyoto?"
"Yes, the school organized a two-day visit"
Tian Shuang kept talking, and Xu Qingzhou added a few words from time to time. The main reason was that Tian Shuang kept nagging, and his words revealed the superiority of returning home in a big city. The noise made him have a headache, and he wanted to leave but couldn't bear to part with the cigarette he had just lit.
Within two minutes, he was forced to accept all the information from Tian Shuang.
Grandma Tian Shuang was sick. She came over to visit her on the weekend. As for this boy, his name was Wang Jiangfei. He was Tian Shuang's classmate. They had known each other since they were young. However, they moved to the Magic City when they were in elementary school. After Tian Shuang passed there, the two of them happened to be in the same room. class.
Tian Shuang's grades are pretty good, and her goal for the college entrance examination is Kyoto Institute of Technology.
After Tian Shuang talked for a while, he began to ask Xu Qingzhou which school he planned to attend.
Xu Qingzhou said perfunctorily that he was not sure yet and that he might choose a school at random. He didn't want to push too much. If he said he could score 700 points, Tian Shuang would probably have more problems.
Tian Shuang thought Xu Qingzhou had poor grades and was a little surprised: "You studied so well in junior high school and went to the rocket class of Chengnan Middle School. Why did you set your goal in Sichuan?"
"Well, we'll see after the results come out." Xu Qingzhou answered casually. He was long past the age of looking for superiority over high school students.
Next to Tian Shuang, Wang Jiangfei smiled happily and said earnestly: "Actually, you don't have to be discouraged. The college entrance examination is just the first test in life. As long as you work hard after going to college, you can catch up with others."
"Maybe." Xu Qingzhou was noncommittal and had no desire to continue the conversation. These words sounded like encouragement and comfort, but in fact they were condescending and hypocritical, which was disgusting.
(End of chapter)