Chapter 24: Junior high classmate

May 12th, another weekend.

Xu Qingzhou has already started writing a paper—"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 took a shortcut, which was a method he liked to use, but he had already published many papers and works, and his focus was basically on quantum mechanics, so he didn't make a corresponding summary.

Outside the library.

Xu Qingzhou leaned against the wall and lit a cigarette.

This is a habit formed over more than ten years. When there is a problem in experiments or calculations, he stands outside and smokes a cigarette to relieve fatigue.

Quitting smoking must be gradual. This is the last one in May, and if he smokes again, he will chop off his hand.

"It is quite big." Xu Qingzhou nodded in agreement.

Read! {

Thinking it was an acquaintance from the Wutong residential area, Xu Qingzhou subconsciously wanted to pinch out the cigarette, but felt something was wrong. Turning his head, he saw a girl standing in front of him.

She was about 1.65 meters tall, wearing a white floral dress, with fair skin, revealing two long, fair legs. In terms of appearance, although she couldn't compare to top beauties like Song Yao, she could definitely be called "pretty and delicate."

Familiar face, but couldn't remember when he had seen her for a while. After confirming it wasn't someone from the residential area, he wasn't afraid, took a puff of the cigarette, and asked: "Who are you?"

Xu Qingzhou perfunctorily said he wasn't sure yet, he might just choose a school at random. He didn't want to pull too much. If he said he could score 700, Tian Shuang's questions would probably be more.

"Kyoto?"

"Yeah, the school organized a two-day visit activity..."

After Tian Shuang talked for a while, she started asking Xu Qingzhou which school he planned to apply to.

By May, the evening wind was a bit hot.

"I'm Tian Shuang, it's only been three years, and you've forgotten me?" The girl was suspicious.

Whoa~ As soon as the other party said this, Xu Qingzhou woke up like a dream, all memories came flooding back. This girl was his deskmate in his third year of junior high, and after graduation, she followed her family to Shanghai to go to school.

Half a cigarette smoked, a sudden exclamation came from behind him.

"Xu Qingzhou?"

Tian Shuang looked at the cigarette in Xu Qingzhou's hand, her expression surprised: "Xu Qingzhou, it's been a few years, you actually learned to smoke."

Xu Qingzhou's personality in junior high was as wooden as ever, short, ugly, and fat, only his studies were worth mentioning. On weekdays, Tian Shuang didn't tease him less. Within two minutes, he was forced to accept all of Tian Shuang's information.

!.

Tian Shuang took the water and introduced to the boy: "This is my junior high classmate, we were deskmates for a year before... At that time, several girls and I liked to tease him."

Recalling it was recalling it, but the memory wasn't very beautiful.

"Yeah, I like to have one when I'm depressed." Xu Qingzhou answered nonchalantly.

Tian Shuang sighed, sighing with emotion: "It's great to meet an old classmate. Just now I was still regretting not being able to go to Kyoto University of Technology."

It's just past eight o'clock now, and there are many people on the street, mostly nearby residents who just finished eating and came out for a walk.

Among them, |e and |e represent the two energy level states of the system respectively. The complex coefficients c(t) and c(t) are given specific values. Assuming that at the initial time t=0, the system is in an equal probability superposition state... Finally, analyze the evolution of the quantum state over time by using the properties and operation rules of the exponential function. Well, the derivation part in the middle should be considered completed.

"No, my friend, accompanying me back this time." Tian Shuang shook her head, seemingly unwilling to talk more about this topic, "Haven't been back for three years, didn't expect Rongcheng to change so much."

Hearing this, the boy's vigilance suddenly decreased a lot. Just listening to the tone, he knew Tian Shuang looked down on such boys.

Squinting his eyes, he performed function derivation in his mind.

Tian Shuang talked non-stop, and Xu Qingzhou occasionally added a sentence. Mainly Tian Shuang kept nagging, and every word revealed the superiority of returning home in fine clothes from a big city, making his head ache, wanting to leave but reluctant to throw away the cigarette he had just lit.

"Little Tian." At this time, a boy came over with two bottles of water, looking at Xu Qingzhou vigilantly, helped Tian Shuang unscrew the bottle cap, and asked: "Who is this?" The boy was about the same height as Xu Qingzhou. As for his appearance, there was a gap with Xu Qingzhou.

Tian Shuang's grades were quite good, and her college entrance exam goal was Kyoto University of Technology.

"Boyfriend?" Xu Qingzhou looked at the boy.

Tian Shuang's grandmother was sick, she came to visit her grandmother on the weekend. As for this boy, his name is Wang Jiangfei, Tian Shuang's classmate, who has known her since childhood, but moved to Shanghai in elementary school. After Tian Shuang went there, the two happened to be in the same class again.

When Xu Qingzhou asked if he was her boyfriend, the boy's eyes lit up, looking at Tian Shuang with some expectation.

Tian Shuang thought Xu Qingzhou's grades were not good, and was a bit surprised: "You studied so well in junior high, and you are in the rocket class of Chengnan Middle School, why is your goal set in Sichuan?"

"Yeah, wait until the grades come out to see." Xu Qingzhou answered very casually. He had long passed the age of finding superiority in high school students.

Beside Tian Shuang, Wang Jiangfei smiled very happily, saying earnestly: "Actually, you don't have to be discouraged. The college entrance exam is just the first exam in life. As long as you work hard after you get into college, you can also catch up with others' pace."

"Maybe." Xu Qingzhou didn't commit, already having no desire to talk. This sounded like encouragement and comfort, but in fact, it had a hypocritical condescension, which was disgusting.

(End of chapter) ===== CHAPTER 25 =====