Chapter 231 Why aren’t you wearing clothes? !
It was a lively meal and I finished two beers.
At 9:30 p.m., night had already fallen, Changchunyuan Street was brightly lit, Xu Qingzhou and others also came out of the hotel, preparing to go back to school.
Everyone is in good condition. Xu Zhengyang and the others' drinking levels have skyrocketed, and they are all very sober.
A group of people walked to the school chatting and laughing, and then went back to their dormitories. Until 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 Beijing University campus was much quieter than usual. On the road, I occasionally met two people who had just returned from a party like them.
Xu Qingzhou drank six or seven bottles of beer and was not drunk, just a little tipsy. Song Yao drank most of the bottle and Xu Qingzhou drank the rest, but his fair face was rosy.
"Why do I feel that Lao Kong was directly fooled into lameness by Teng Xiaojuan." Xu Qingzhou looked strange.
Song Yao knew Teng Xiaojuan better than Xu Qingzhou, and said with certainty: "I was deceived."
"I hope Lao Kong can control it."
Xu Qingzhou smiled softly. Judging from the current solution, there is nothing wrong with Teng Xiaojuan. She feels like a good girl and a funny girl.
Before leaving school, Xu Qingzhou received a call from Professor Zhong.
Professor Zhong is a straightforward person, without much greeting, and said: "Xiao Xu, regarding the issue of quantum decoherence, I have sent you some information. These are from foreign laboratories. About how to deal with quantum decoherence."
"Look at it if you have time."
Xu Qingzhou said with a smile: "In addition, I already have some ideas. Let’s try it first. If you want to know more about it, we’ll talk about it on Monday.”
“Do you have an idea?” Professor Zhong was slightly surprised.
Xu Qingzhou nodded and said: "I have to sort it out first, I haven't started writing yet."
Seeing Xu Qingzhou hang up the phone, Song Yao asked: "Research institute?"
"That's me. The Professor Zhong you were talking about encountered a big problem there, and I still haven’t figured out how to solve it.”
Xu Qingzhou still likes to talk to Song Yao about things in the institute occasionally, and talks about encounters. How about people, Professor Zhong, Deng Ziyi, Professor Chang, and food.
"You can't solve it?"
"For me, it's a small problem."
"Xu Qingzhou, can't you be more humble?"
Song Yao pinched Although I was very proud of squeezing Xu Qingzhou's hand, having an excellent boyfriend was also a lot of pressure, and I had to find a way to catch up with Xu Qingzhou's pace.
Institute.
In the classroom, in addition to Professor Zhong, there are also Deng Ziyi and two doctoral team members, Wan Hao and Wang Yigui.
"Xu Qingzhou said he has an idea over there?" Wan Hao said it was a bit hard to accept. They had been researching for a day and still had no clue, and they still have no idea how to start.
Professor Zhong nodded slightly.
Wang Yigui sighed: "This classmate Xu Qingzhou is very good. I saw the formula he set up to solve the Schrödinger equation. It is simple and clear at a glance."
Deng Ziyi has nothing to say and is already numb. , for Xu Qingzhou, she can't seem to find any other description except "big boss, awesome".
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 before us now. One is quantum decoherence. The second problem is the accuracy of the density matrix calculation. "Don't come to the laboratory tomorrow and have a good rest. We have to chew through these two difficult bones."
Yes, Xu Qingzhou said that he already had ideas there, but Professor Zhong didn’t think Xu Qingzhou could really solve it. He didn’t doubt Xu Qingzhou’s ability. Anyone who can solve two world-class problems is definitely an expert. .
Furthermore, he had also been in contact with Xu Qingzhou and knew that this young man was very strong in mathematics, but the problems before him were too big and too complex. They were not just purely theoretical mathematics problems, but also had to be combined with simulated satellite data. Various test data are used to establish a mathematical model that is consistent with satellite operation.
It is normal if it cannot be solved.
Yandong Garden.
As soon as she got home, Song Yao got into the bathroom to take a bath. The smell of hot pot and wine was too strong.
Xu Qingzhou took out his computer and looked at the information sent by Professor Zhong. In addition to the content related to quantum decoherence, there were also several articles on density matrix descriptions.
This means that another group responsible for the density matrix also encountered problems.
Xu Qingzhou leaned on his chair and tapped his fingertips on the table, recalling relevant knowledge. Generally speaking, the density matrix has not changed much in the algorithmic steps for dealing with 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 step is evolution. Based on the principles of quantum mechanics and the Hamiltonian of the system, the evolution of the density matrix over time is calculated.
Then there is measurement, measuring the quantum system under a specific measurement basis, and calculating the probability distribution of the measurement results based on the density matrix.
The last step is entanglement analysis
The stage where problems arise now should be the evolutionary part.
Here, during the long-term evolution process, due to the cumulative errors and rounding errors in numerical calculations, the density matrix may lose its due physical properties, such as Hermitian properties, positive semi-definiteness, and so on.
“Huh~”
Xu Qingzhou stretched himself, thinking that if he had time tomorrow, he would do all of this at once to avoid trouble later.
Browsing through the information, after Song Yao finished taking a shower and simply washed herself, he stood up and used a hair dryer to help her dry her hair.
In this comparison, Song Yao's body smelled of milk and milk, while his body smelled of wine and hot pot, so he might as well take a shower.
The sound of running water sounded again in the bathroom.
Song Yao is sitting on the sofa reading a book, her two little feet swaying. It is obviously very comfortable to read on the desk next to her, but... maybe it is like tacitly knowing that Xu Qingzhou has to pull her breasts every night foot.
However, perhaps seeing that Xu Zhengyang and Chen Shiqi were so inseparable, she inexplicably wanted to stick with Xu Qingzhou tonight.
Ten minutes later, when she heard the bathroom door open, Song Yao said: "Xu Qingzhou, let's find a movie later"
Song Yao's next words stuck in her mouth, because of this Xu Qingzhou had already come out and was wearing underwear.
“You, why don’t you wear clothes!”
“It’s wrong to forget to bring pajamas. Underwear counts as clothes. Besides, we are all an old married couple. We don’t even think about it. "Nothing."
Xu Qingzhou said nonchalantly, squeezed some toothpaste, brushed his teeth slowly, and even took a walk in front of the beauty of Song University while holding his mobile phone.
Song Yao's fair cheeks were rosy, and she liked the words "old husband and wife" very much, but she still spat on the surface, stared at him, and urged: "Put on your clothes!"
"After brushing your teeth, go to Gululu."
Forgot? Of course it's impossible. I just played a trick before entering the bathroom. I deliberately didn't bring it with me. I boiled the frog in warm water and took it step by step to let the school beauty Song get used to it first.
(The next chapter is pulled into a small dark room)
(End of this chapter)