Chapter 231 Why aren’t you wearing any clothes? !
The meal was very lively and we finished both bottles of beer.
At 9: in the evening, night had already fallen and the Changchunyuan street area was brightly lit. Xu Qingzhou and others also came out of the hotel and prepared to return to school.
Everyone was in good condition. Xu Zhengyang and the others' alcohol tolerance increased dramatically, and they were all very sober.
The group of people walked towards the school talking and laughing, and then returned to their dormitories. Finally, Zhang Qiong and the others turned left at the intersection, and only Xu Qingzhou and Song Yao were left in the small group.
On Saturday, the Kyoto University campus was much quieter than usual, and they occasionally met two people on the road who had just returned from a party like them.
Xu Qingzhou drank six or seven bottles of beer. He was not drunk, but a little tipsy. Song Yao drank most of the bottle, and Xu Qingzhou drank the rest, but his fair little face was rosy.
"Why do I feel like Old Kong was fooled by Teng Xiaojuan?" Xu Qingzhou looked strange.
Song Yao knew Teng Xiaojuan better than Xu Qingzhou, and said with certainty: "She was fooled."
"I hope Lao Kong can hold on."
Xu Qingzhou smiled gently. From the contact he had made so far, there was nothing wrong with Teng Xiaojuan. She seemed to be just a socially active and funny girl.
Before leaving the school, Xu Qingzhou received a call from Professor Zhong.
Professor Zhong is a straightforward person. Without much small talk, he said, "Xiao Xu, regarding the problem of quantum decoherence, I sent you some information. These are all methods used by foreign laboratories to deal with quantum decoherence."
"Take a look if you have time."
Xu Qingzhou smiled and said, "Thank you, Professor. Also, I already have an idea and I plan to try it out first. I'll talk about the details on Monday."
"Do you have any ideas?" Professor Zhong was slightly surprised.
Xu Qingzhou nodded and said, "I need to sort it out first. I haven't started writing yet."
After seeing Xu Qingzhou hang up the phone, Song Yao asked, "Research Institute?"
"That's the Professor Zhong I told you about. He's encountered a big problem over there, and he still hasn't figured out how to solve it."
Xu Qingzhou occasionally still liked to talk to Song Yao about things in the research institute, about the people he met, Professor Zhong, Deng Ziyi, and Professor Chang, and how the food was.
"You can't solve it either?"
“For me, it’s a minor issue.”
"Xu Qingzhou, can't you be more humble?"
Song Yao squeezed Xu Qingzhou's hand. Although she was quite proud, having an excellent boyfriend also put a lot of pressure on her. She had to find a way to catch up with Xu Qingzhou.
graduate School.
In the classroom, in addition to Professor Zhong, there were Deng Ziyi and two doctoral team members, Wan Hao and Wang Yigui.
"Xu Qingzhou said he has an idea?" Wan Hao found it hard to accept. They had been studying it for a day but had no clue and still didn't know where to start.
Professor Zhong nodded slightly.
Wang Yigui sighed and said, "This student Xu Qingzhou is amazing. I saw the formula he constructed to solve the Schrödinger equation. It is concise and clear at a glance."
Deng Ziyi didn't have much to say. She was already numb. As for Xu Qingzhou, she couldn't seem to find any other way to describe him except "awesome boss".
Whose freshman is so awesome?
"We'll find out on Monday."
Professor Zhong smiled and looked at the blackboard next to him: "There are two big problems facing us now. One is the problem of quantum decoherence, and the second is the problem of accuracy of density matrix calculation." "Everyone doesn't need to come to the laboratory tomorrow, have a good rest. Next week, we must chew down these two tough bones!"
Yes, Xu Qingzhou said that he already had an idea, but Professor Zhong didn’t think Xu Qingzhou could really do it. It wasn’t that he doubted Xu Qingzhou’s ability. Anyone who could solve two world-class problems was definitely an expert.
Moreover, he had also met Xu Qingzhou and knew that this young man was very strong in mathematics, but the problem before them was too big and too complicated. It was not just a purely theoretical mathematical problem, but also required combining various test data from simulated satellites to establish a mathematical model that was consistent with the satellite's operation.
It's normal that it can't be solved.
Yandong Garden.
As soon as she got home, Song Yao went into the bathroom to take a shower. The smell of hot pot and alcohol was too strong.
Xu Qingzhou took out his computer and checked the information sent by Professor Zhong. In addition to the content related to quantum decoherence, there were also several articles about density matrix descriptions.
This means that the other group responsible for the density matrix also encountered problems.
Xu Qingzhou leaned back in his chair, tapping the table lightly with his fingertips, recalling relevant knowledge. Generally speaking, the density matrix does not change much in the algorithmic steps for processing quantum states and entangled states.
The first is initialization, which determines the initial state of the quantum system and represents it with a density matrix. The second is evolution, which calculates the evolution of the density matrix over time based on the principles of quantum mechanics and the Hamiltonian of the system.
Then comes measurement, which involves measuring the quantum system under a specific measurement basis and calculating the probability distribution of the measurement results based on the density matrix.
Finally, entanglement analysis
The stage where problems arise now should be the evolutionary part.
Here, during the long-term evolution process, due to the accumulated errors and rounding errors of numerical calculations, the density matrix may lose its proper physical properties, such as Hermitian property and semi-positive definiteness.
"Whoo~"
Xu Qingzhou stretched and thought that if there was enough time tomorrow, he would get all of these done at once to avoid trouble later.
He glanced through the information and waited for Song Yao to finish her shower and wash up. Then he stood up and used a hair dryer to help her dry her hair.
In comparison, Song Yao smelled of milk, while he smelled of alcohol and hot pot, so he might as well take a shower.
The sound of running water could be heard again in the bathroom.
Song Yao was sitting on the sofa reading a book, her two little feet swinging back and forth. It was obvious that she was reading comfortably on the desk next to her, but... maybe it was a tacit understanding, Xu Qingzhou would touch her feet every night.
However, perhaps because she saw how close Xu Zhengyang and Chen Shiqi were to each other, she inexplicably wanted to stick with Xu Qingzhou tonight.
Ten minutes later, Song Yao heard the bathroom door open and said, "Xu Qingzhou, let's find a movie later."
The words Song Yao was about to say were stuck on her lips, because Xu Qingzhou had already come out at this time, wearing only his underwear.
"You, why don't you wear clothes!"
"It's not right to say you forgot to bring your pajamas. Underwear is also considered clothing. Besides, we are an old married couple, so having sex without clothes is not a big deal."
Xu Qingzhou said nonchalantly, squeezed some toothpaste, brushed his teeth slowly, and even took the opportunity to take out his phone to walk his bird in front of the campus beauty of Song University.
Song Yao's fair cheeks were rosy, and she liked the words "old couple", but on the surface she still spat, stared at him, and urged: "Put on your clothes!"
"Go to Gurulu after brushing your teeth."
Forgot? Of course not. I was just being careful before entering the bathroom and deliberately didn't bring it with me. I was boiling the frog in warm water, step by step, to let School Beauty Song get used to it first.
(The next chapter was dragged into the small dark room)
(End of this chapter)
