In the city of Greifswald did not stay for a long time, the next day after visiting the spiral stone 7-x laboratory, Lu Zhou and Professor Cui Qing returned to Berlin.

It’s been a month since I came to Germany. During this time, although Lu Zhou’s gains are not small, there are a lot of things that Princeton has accumulated waiting for him to finish, almost to the return journey. when.

After booking the ticket for the weekend, Lu Zhoushun went to the University of Bonn for a visit, and then President Strawman of the Max Planck Society, who drove him to the Tegel International Airport in Berlin.

When I got off the bus, the gray-haired old man held Lu Zhou’s hand and said with a smile, “Thank you for your speech to Berlin. We sincerely look forward to your next visit and sincerely wish you more to climb on the academic road. High peak."

"Sure," holding the hand of President Straman, Lu Zhou smiled friendly and continued in a funny tone. "Even if it is for the magnificent scenery along the way, I will continue on this road." Go on."

After bidding farewell to President Strahan, Lu Zhou dragged his suitcase and passed the waiting hall to board the plane.

After ten hours of flight, it landed at JFK International Airport in New York.

This time, I didn’t inform anyone in advance, and Lu Zhou had a rare experience of a slow train.

All the way to the familiar Princeton town, greet him, naturally his students.

In order to celebrate his Holf Medal, under the proposal of Hardy, a group of young people opened a party in front of the boat in the boat.

However, the food at the party was not Haddy’s self-proclaimed authentic Brazilian barbecue, but a skewer of the Chinese side roadside food.

After going abroad for so long, Lu Zhou was still the first time, and experienced the feeling of a string in foreign countries.

The only regret is that there is no beer in the refrigerator, only the fruity champagne, the feeling is not authentic enough.

Sitting on the lawn and squatting, Lu Zhou couldn't help but think of the three little friends of 201.

After the graduation, the trajectory of life has not intersected. Usually, there is basically no contact, and I don’t know how they are doing now.

Just then, Hardy, a hippie smile, came over with a champagne.

"Professor, can I interview you?"

Lu Zhou casually said: "If it is a normal problem."

"Reassuring, it is definitely a normal problem." Clearing his throat, Hardy said, "Excuse me, what is the experience of gaining the honor of the chemical industry as a mathematician?"

Lu Zhou thought about it and said, "Probably... is an experience that you will not realize in your life."

"Hey, Professor, you are so hurtful, I am one of your chief disciples," Hardy said with a very hard-faced expression. "You can't be more confident with me." ?"

Looking at the surface that was hit hard, in fact, did not take this seriously, Hardy, Lu Zhou really has some heartache.

It is not for the stupid child, but for himself.

At that time, what kind of advantage did this guy have in mind, and gave this guy an offer?

This problem still plagues him...

In the second half of the party, Luo Shixiong, who had just talked about his new girlfriend, was finally late.

Only this time, he did not bring his girlfriend, but instead brought a good news.

After several months of hard work, with the help of Wei Wen, he finally completed his graduation thesis.

The paper "On the study of the even-coherent state of the q-distorted harmonic oscillator in the finite-dimensional Hilbert space" was finally accepted by the "phys-today" journal and will be published within six months.

This journal is a comprehensive journal. Although the impact factor is not high, only 4.3, but for a doctoral student, especially the doctor of theoretical physics, this result has been quite good.

Moreover, the impact factor is not the only criterion for measuring the academic value of a journal. His boss, Witten, occasionally "waters" on "phys-today."

After the publication of this paper, no accident, he will be able to get a doctoral degree early next year.

"Thank you so much, you are my savior!" At the party, Luo Wenxuan found Lu Zhou and excitedly hugged his shoulders with his hands. "I must have a drink for the next day!"

"You don't have to thank me. Wei Wen is helping you." Lu Zhou stepped back and said with a smile. "Of course, if you must ask me for a drink, I will not object."

"Actually, I didn't help a lot," Wei Wen coughed. It seemed that he was not used to being so touted by others. He explained it in a serious way. "I am only responsible for some computing work, but my name is hung in Is it really appropriate in the paper?"

"No, no, no, just 'computational work', I don't agree with this sentence," Luo Shixiong shook his head. "The fundamental of mathematical physics is to study mathematical solutions to physical problems. You make up for my shortcomings in this area." Without your help, maybe this paper will not be completed until the end of the year."

Seeing that Brother Luo is so frankly admitting his lack of mathematics, Lu Zhou sighed and couldn’t help but vomit: "Old Tang heard that you said this sentence would be heartbreaking. Are you really engaged in applied mathematics? ?"

How did this guy get the Princeton offer?

And it is the offer of this big cow of Witten.

When I heard Lu Zhou’s words, Luo’s brother was embarrassed to touch the back of his head and smiled thickly.

"Nothing, Lao Tang is mentally prepared. He has never trained me before."

Lu Zhou: "..."

......

The next morning, returning to the Princeton Institute of Advanced Studies, Lu Zhou did not immediately start his own research, but found Professor Edward Witten and planned to consult some things.

The designer of the imitation star, Lehmann Spitzer, worked at the Princeton Institute for Advanced Studies for a short time, and the original concept of the imitation star was born at Princeton University.

According to common sense, in places where he has worked, how many clues should be left.

"Congratulations, the Hoffman Medal is a great honor." Looking at Lu Zhou, who appeared at the door, Edward Witten smiled and said, "How did the German trip feel? See the old guy of Faltins." ?"

"I saw it, but I always feel that he doesn't like me very much." Lu Zhou said helplessly.

Edward Wittenhaha smiled. "Please don't mind, the old man is like this to anyone. Even if he is a good Deligne with him, he often can't stand him. But listening to you, I am against it. It is relieved... It seems that his body should be fairly good, at least there is still the strength to hurt people."

"I don't mind," Lu Zhou shrugged and paused for a while, continuing. "In fact, this time I went to Germany, I not only stayed in Berlin, but also went to Greifswald."

"Greifswald?" When he heard the place name, Witten's eyebrows suddenly provoked interest and immediately guessed where Lu Zhou's destination was. "You went to the spiral stone 7-x lab?"

"Yes," Lu Zhou nodded. "Professor Clinton took me to visit the spiral stone 7-x imitation star there. Not only that, I was very fortunate to see the test site."

"You are really lucky. I have been to Europe five times in the past two years, and I have been to Germany twice. However, every time I went, I missed the Spiral 7-x experiment perfectly, especially in 16 years." Speaking of this, Professor Witten’s face was a regrettable expression.

I can't help with his regrets. Lu Zhou coughed and said that he came to visit him.

"About the imitation star, I hope to ask you something."

Witten and Yan Yue said: "What?"

Lu Zhou: "About Lehman Spitzer's manuscript..."