The ceremony of receiving the airport was not very grand, there were no greeting staff on the left and right, there was no motorcade lined up in a line of fanfare, and in addition to the three directors and one president, there were only two accompanying research assistants.

According to Professor Faltins, both of them are PhDs from the Max Planck Institute of Mathematics, and the reason why they appear here is because they have temporary administrative jobs at the Max Planck Society, and another bigger reason is to admire his name for a long time.

However, even so, two Nobel Prize bigwigs and a Fields Medal bigwig are here, which is not a grand pick-up in itself, but it has become much more significant.

However, as a pragmatist, Lu Zhou doesn't really care much about these red tapes.

When he went to Stockholm to receive the award, he took the subway alone after getting off the plane and sightseeing all the way.

This time in Berlin, Lu Zhou originally planned to take a ride to the hotel where he was staying, and even investigated the route in advance.

It's just that these preparations seem to be redundant now......

"You're a genius, how did you come up with those formulas?" Sitting in the car sent by the Max Planck Society at the door, Professor Ettel couldn't help but ask as soon as he fastened his seat belt.

Lu Zhou said in a joking tone: "You may not believe it, but when I was researching literature in the Flint Library, the Schrödinger equation gave me a lot of inspiration. ”

Cléching laughed: "There is nothing unbelievable, the HF method and molecular dynamics simulations have been inspired by quantum mechanics. ”

Obviously not wanting to hear the guy brag, Professor Ettel coughed lightly and continued to ask.

"I've read your paper, and although I don't understand some of the theories in it, I have many doubts about what I know. How did you accurately reduce the solution of the many-body ground state to the solution of the ground state density distribution? If you use the Schrödinger equation, how does your theory differ from the first-principles calculation method in terms of results? ”

First-principles computational methods are the core methods of modern computational chemistry, and the source of its core theory is the Schrödinger equation in quantum mechanics. This calculation method is somewhat advanced, but it is also very problematic.

First of all, the number of variables reaches the astronomical figure of 3N (N is the total number of particles), and then the results of his settlement are often quite controversial.

Not only is the number of variables staggering, but there are also outrageous empirical parameters added to make the conclusion "a little better".

"Yes, but not exactly," Lu Zhou smiled and continued, "I introduced some concepts of functional density theory into the study of the ground state density distribution problem room, such as taking the radius of the specified core region in the atom as ra, which is called the truncation radius, and the pseudo-wave function outside the truncation radius is the same as the real valence electron wave function ψv, so as to obtain the ......"

"I'll leave the professional questions for a week to discuss," already starting to feel his head big, President Straman coughed dryly, diverted the topic, looked at Lu Zhou and continued to ask, "What are you going to do this week?" ”

I don't have a blackboard at hand, so it's really not easy to continue with the rest of the section.

Lu Zhou made a helpless expression at Professor Etter, and after thinking for a moment, he continued: "Before the report starts, I want to familiarize myself with the environment here, is there anything interesting you can recommend to me?" ”

As soon as he heard this topic, Professor Clitzing suddenly became interested, and said vividly: "Interesting place? There's nothing more interesting in the whole of Berlin than Max Planck Lab, so why don't I show you around? ”

Lu Zhou's eyes lit up, and he immediately said, "Please be sure to take me to take a look." ”

More than landmarks such as the Brandenburg Gate and the Reichstag, it was the laboratory that interested him more. In particular, the Max Planck Society's laboratories are well-known in the field of condensed matter physics.

With a Nobel Prize bigwig acting as a tour guide, Lu Zhou will naturally not let go of such an opportunity.

After half an hour's drive, we arrived at our destination quickly.

Getting out of the car at the door of the Bernitz Hotel, Lu Zhou took out his luggage from the trunk of the car.

Just as he was about to say goodbye to several scholars, Lu Zhou suddenly remembered something that had puzzled him for a long time.

"By the way, I've always wanted to ask a question."

Professor Clitzing said kindly, "If I can answer it." ”

Lu Zhou smiled: "This question may be a little boring, just out of my personal curiosity. Why was the Institute of Condensed Matter Physics and not the Institute of Chemistry sending me an invitation? ”

Even the Institute of Mathematics could understand him, but the Institute of Condensed Matter Physics issued this invitation...... Although it is not unrelated to his research, it still makes him a little confused.

However, for some reason, when he asked this question, the atmosphere was a little subtlely awkward.

Professor Ettel and Professor Faltins, in particular, both had speechless expressions on their faces.

Lu Zhou gradually began to realize that he seemed to have asked a question that he shouldn't have asked.

Only Professor Clezing's expression was a little smug, and he cleared his throat and spoke.

"That's a good question......

However, before he could finish his sentence, he was interrupted by Faltins.

"It's a really boring question," Faltins continued, playing with the hat in his hand, with a nonchalant expression, "and besides, next time I'll be betting I'll consider playing blackjack instead of a non-technical coin toss." ”

Lu Zhou: "......"

Although he was still confused, after hearing this sentence, he seemed to understand something......

……

The Max Planck Society was founded in 1911 as the Royal Wilhelm Society, which was established by Kaiser Wilhelm II under his own name, believing that interest in science and technology could strengthen the country.

Judged from the perspective of the times, this decision was undoubtedly quite far-sighted at the time. Thanks to the support of national capital, a large number of outstanding scholars and scientific research projects have emerged, so that Germany's science and technology have maintained the world's leading level of science and technology for 30 years.

After the end of World War II, the Royal William Society was disbanded, but it was retained as the Max Planck Society with the support of the British.

The impact of this legacy is still visible today.

Although the position of the world's academic center has been moving westward across Haiti since the Cold War, because of the hematopoietic ability of the Max Planck Society, Germany's research in the fields of engineering technology and condensed matter physics still maintains the world's leading level.

From this point of view, the Germans were undoubtedly much luckier than the French, who had lost their position as the center of world mathematics.

After staying in the hotel, Lu Zhou rested for a day, and the next day, at the invitation of Professor Klitzing, he went to the Max Planck laboratory in Berlin.

Strictly speaking, the Max Planck laboratory is also part of the legacy of the Royal William Society, but it has been modernized so that it is almost invisible.

“…… The Max Planck Society's laboratories are located in various cities in Germany, and this is only one of them, and it is probably the largest, and many research institutes in the field of physics and chemistry have a considerable number of research topics here. It's like a reactor that ignites knowledge in various fields and releases its energy. ”

Lu Zhou thought for a moment and asked, "So the research here is carried out by the research institute?" ”

Professor Cléching replied in a casual tone: "Not really, to be precise, most of the projects here are carried out in research groups, and there is a big difference between groups. For those who haven't worked here, this may be difficult to understand, but in short, you can understand that it is a very different way of doing research than American research institutions. ”

Walking along the tree-lined path leading to the condensed matter physics laboratory, Professor Cléching talked to Lu Zhou about the composition of the Max Planck Society and chatted with him about various interesting facts about the place.

While passing by a unique flat building, Lu Zhou cast a curious gaze over there.

"What's over there?"

Professor Kleezing said with a smile: "Over there is the 'industry' of the Institute of Plasma Physics, you can guess what is in there, I bet, you will never guess." ”

"Could it be a collider?" Lu Zhou joked.

"Haha, that's not it, it's a more sci-fi thing than a collider," Haha smiled, and Professor Clitzing said in a joking tone, "You've probably heard of the interesting topic of controlled nuclear fusion." ”