Chapter 110 Come prepared After confirming Xu Qingzhou's idea, Gu Zhizhong said no more and asked Xu Qingzhou to go with him. Then, he took Xu Qingzhou to the second floor and went straight to the meeting room. On the way, he briefly told Xu Qingzhou about the current situation. When they went in, four people inside were drinking tea. Sitting on the left was Jiao Mingwu, and there was a fat old man, the dean of the School of Mathematics, Tao Fangqi. The people sitting opposite him were also familiar faces, Nie Zuozhen and Ji Yunshi. When Xu Qingzhou returned to Peking University to teach, Ji Yunshi was already the executive vice president of the School of Physics. Xu Qingzhou greeted politely: "President Nie, Director Ji." "This must be Xu Qingzhou, please take a seat." Nie Zuozhen waved with a smile. Tao Fangqi and Jiao Mingwu also smiled and signaled Xu Qingzhou not to be nervous. Nervous? Not at all. Xu Qingzhou nodded gently and sat down on the sofa calmly. Well, he is neither arrogant nor impatient, and his every move reveals a calmness that is not typical for his age. That is very good. On the opposite side, Nie Zuozhen nodded secretly in his heart.
"Student Xu Qingzhou, maybe many people have asked the same question as me, but I still want to ask you in person, did you complete this paper independently?" Nie Zuozhen asked in a deep voice. "Yes, there are two papers cited in it, and they are marked. They are Richard Feynman's "Quantum Mechanics and Path Integrals" and Doni Carrillo's "Theoretical Extension of Einstein Coefficients in Quantum Optics." Nie Zuozhen narrowed his eyes and said, "Young people are formidable, Xu Qingzhou. Your paper is very well written, but we still have two questions. Are you willing to tell us?" "You say." Xu Qingzhou knew that the other party was testing him. Nie Zuozhen nodded and said, "In the fifth paragraph of page 3 of the paper, the transition rate from state 5 to state 2 is also proportional to W(ω), that is, the transition rate ψ = BW(ω). The subsequent part directly lists the rate equation for the change of energy level population with time, but it is just briefly mentioned here. Can you explain it in detail?" The questions raised are very well-posed. This part is just a connection and transition and has nothing to do with most of the content of the paper, but it is very crucial. It involves thermal equilibrium situations, Planck's law, etc., which is enough to reflect a person's level. Beside them, Gu Zhizhong and others did not speak. They were not physicists and did not understand these things. Xu Qingzhou thought for a moment and said, "To determine the three Einstein coefficients A, B, and B, we only need to consider the properties of the two atoms, which has nothing to do with W (ω)." "Since N is large enough that both N and N vary smoothly with time for individual photon absorption and emission, the energy level population varies with time as \frac{x}{\ln(x)}<\pi(x)" As he spoke, he even took out a piece of manuscript paper and wrote down the formula. Looking at the young man who was talking across from him, Gu Zhizhong took a sip of tea. He could no longer hide his proud expression. This student gave him too many surprises. Nie Zuozhen and Ji Yunshi nodded from time to time. When Xu Qingzhou finished speaking, their eyes were full of admiration, and the last trace of doubt in their hearts disappeared. His foundation in physics was very solid. If they didn't know that Xu Qingzhou was a freshman, they would even suspect that he was their graduate student, or even a doctoral student. Ji Yunshi asked again, "Why didn't you point out this process in your paper?" "These contents." Xu Qingzhou coughed lightly and said helplessly: "I guess it will take another paper to put them down. This paper simply discusses the role of Einstein coefficient A and Einstein coefficient B in quantum mechanics." Nie Zuozhen and Ji Yunshi fell silent, with mixed feelings. However, they soon thought of the main business, and Nie Zuozhen said, "Xu Qingzhou, have you ever considered studying in our Physics Department?" "Dean Nie." Gu Zhizhong said directly without beating around the bush: "I just asked Xu's opinion, and he still plans to study in our School of Mathematics." Upon hearing this, Nie Zuozhen became anxious and looked at Xu Qingzhou and said, "Xu Qingzhou, with your talent, you will definitely achieve great things in the Physics Department!"
Tao Fangqi couldn't take it anymore and glared at him: "Old Nie, what you said is wrong. Does Xu Qingzhou have no future in our School of Mathematics?" "Old Tao, you have seen Xu Qingzhou's talent in physics. He was born for physics!" "I've also seen his talent in mathematics, which is no worse than his talent in physics!" Tao Fangqi retorted. The atmosphere seemed somewhat tense as the two sides were at loggerheads. "Dean Nie, Director Ji, just like Professor Gu said, I want to lay a solid foundation in mathematics first. Physics is not my main focus." Xu Qingzhou said quickly. "Student Xu, we still hope that you can seriously consider it. After all, choosing a suitable major is very important for your future development." Ji Yunshi looked at Xu Qingzhou and persuaded him, "Besides, we can customize a special training plan for you. Of course, you also have a guaranteed postgraduate study and government scholarship." "Director Ji, we also have a more detailed training plan for Xu Qingzhou." Jiao Mingwu said slowly. Facing the gazes of Nie Zuozhen and the others, Xu Qingzhou still shook his head and said, "Thank you for your kindness, teachers. For now, I plan to study mathematics first, and then consider physics after I have a good foundation in mathematics." Nie Zuozhen had no choice but to stop asking. At this time, Tao Fangqi and a few others nearby were already staring at him. He paused and suggested, "If you're willing, Xu Qingzhou can come to our School of Physics to study for a second degree." This was also what they had discussed on the way here. If the School of Mathematics would not let them go, they would settle for the next best thing. Just as Xu Qingzhou said, if you learn mathematics well, it will also be quite helpful for physics. Moreover, now that I have come to the School of Physics, it will be natural for me to switch to majoring in physics in the future. "Old Nie, the dual degree program only starts in the sophomore year. Isn't it a bit early now?" Tao Fangqi frowned. "Special matters should be handled specially. We can open a talent channel so that Xu Qingzhou can attend classes in the School of Physics this semester." Nie Zuozhen looked at Xu Qingzhou with a smile. Those who come prepared are all thousand-year-old foxes. Gu Zhizhong and the other two now realize that Nie Zuozhen has probably been waiting here for a long time. First propose a condition that they will definitely oppose, and then take a step back. However, they did not say anything. Instead, they looked at Xu Qingzhou and said from the bottom of their hearts that they did not very support Xu Qingzhou's choice of a double degree. People have limited energy, and both mathematics and physics require a lot of effort. However, all this depends on Xu Qingzhou's opinion. Xu Qingzhou did not expect Nie Zuozhen to come up with this method. After thinking about it carefully, it seemed feasible. According to the original plan, his classmates who were studying mathematics should also gradually start their previous physics research. This seems more convenient. "A double degree is no problem." Xu Qingzhou paused and said shyly, "But can I make a request?" "You said." "I hope to be able to choose which classes to take by myself, after all, I have already learned a lot of the content by myself. Of course, I will take the final exam as usual." "That's no problem." Nie Zuozhen nodded with a smile. As long as people come, nothing else matters. (End of this chapter)