I really don't want to lie down and win

"Do you still want to issue a comprehensive examination paper?"

"Let me figure out the difficulty?" Xu Mang was stunned for a moment, then asked cautiously, "Mr. Teng... I'm a vicious person, aren't I afraid that the entire army of candidates from Zhejiang Province will be wiped out?"

"fine."

"When the time comes, you will be pushed out. Those media dare not report on you indiscriminately." Teacher Teng laughed.

I...

that's ok,

Since you are not afraid of death, then I panic!

"it is good!"

"Ms. Teng...don't blame me for being too ruthless." Xu Mang said seriously, "The difficulty of the questions I gave is quite high. It tests the comprehensiveness of the students, especially for those so-called geniuses. serious."

"Fine!"

"I know your routine, anyway, according to your intention, you don't need to go to Jiangda University, just publish the paper and send it to my mailbox. It's a little embarrassing for a scientist of your age to ask you to come here. Teacher Teng said: "Let's settle this first, and I won't bother you."

"Oh..."

Snapped,

hang up.

Xu Mang looked at the interrupted phone interface and let out a long sigh.

Sorry,

classmates,

requested by your leaders.

thoughts return to reality,

Xu Mang was at a loss for a while looking at the theory he had just written.

"It seems..."

"It still can't get around graphene."

Opening the thesis of the Oxford University research team, Xu Mang carefully read the above content. According to their experimental report, Xu Mang suddenly felt a little familiar. When he saw the data, he felt very strange...Who would have thought is a topological state.

However, the research team at the University of Oxford directly associated superconductivity, and believed that the superconductivity produced by the twisted double-layer graphene is related to the fragile topological state, which is a bit awesome.

Their second paper illustrates a situation where fragile topologies are more common than strong topologies. At present, about a quarter of materials have strong topologies, and studies have shown that electrons in fragile topological states exist in almost all materials.

Then hundreds of thousands of examples of suspected fragile topological phenomena were found in crystal databases.

suspected,

But it's not clear.

"Hey?"

"Professor Fan...can you spare me two days in the lab?" Xu Mang said with a smile, "It's nothing...just to let others know that I'm still here."

...

The next day,

Fan Zhilong, professor of condensed matter physics at Fuda University, came to the laboratory early, waiting for Xu Mang's arrival.

Yesterday he received a call and was told to borrow the laboratory. Facing Xu Mang's request, Fan Zhilong naturally agreed, not to mention that he is the deputy director of the physics department. Based on his reputation alone, he should consider his request first. .

"Oh?"

"Professor Fan is so early?" Xu Mang came to the laboratory with a bag of soy milk and buns, smiling, and asked, "Have you had breakfast?"

"..."

"Are you usually quite leisurely?" Fan Zhilong said helplessly, "By the way, what's going on this time? Did you get into a fight with someone else?"

"nothing..."

"Do you know fragile topology?" Xu Mang asked.

Fan Zhilong was stunned for a moment: "Of course I know this. It belongs to the field of our condensed matter physics. It seems... Not long ago, a certain research group at Oxford University discovered this magical phenomenon in your double-layer twisted graphene. topology."

Fan Zhilong asked: "But there is only indirect evidence for this at present, and direct evidence is very difficult, almost... you know, anyway, our professors in the Physics Department of Fuda think it is unlikely."

"is it?"

Xu Mang took a bite of the steamed stuffed bun and said calmly, "It's not necessarily...I think it's possible."

"..."

"You...you don't want to use the laboratory to study fragile topological states?" Fan Zhilong said in surprise: "This is different from strong topology, which will show measurable phenomena, while the measurable effects of fragile topological effects are very weak. , so weak that it is almost negligible.”

"The Oxford research team only found indirect evidence, which is suspected of fragile topological phenomena." Fan Zhilong said, "Have you thought it through?"

"Actually, this is not a very difficult problem." Xu Mang smiled and said, "The research team at Oxford University has already discovered it, but they didn't notice it, just like when I discovered that double-layer twisted graphene can superconduct, but I didn't notice it. to a suspected topological state."

Fan Zhilong didn't say a word. Since Xu Mang thought there was no problem, then there was really no problem. After all... His name was Xu Mang, which meant full of miracles.

"Is two days enough?"

"How about I spare a little more time?" Fan Zhilong asked, "How about four days?"

Xu Mang took a sip of soy milk, raised his head and smiled, "One day is enough."

Fan Zhilong:? ? ?

......

Chapter 494 Schrödinger's Uncertainty (3/3, add more for Shuoyou)

this day,

Fan Zhilong found a few bigwigs in the industry, Wang Jiafu, a bigwig in theoretical physics, Hua Yanfeng, who is in the field of particle physics, and Professor Li Aimin, who majored in optics. He borrowed a free opportunity, and Fan Zhilong told the three of them a situation.

"I'll tell you something..."

"Don't be surprised!"

"Do you still remember the fragile topological state we discussed earlier?" Fan Zhilong said with a mysterious face.