Chapter 357 Unexpected Direction

Chapter 357 Unexpected Direction

Double-slit interference the next morning.

"What?"

Inside the Synchrotron Radiation Office of HKUST.

Academician Pan, who was sipping a bowl of Taihe Ban Mian, took a sip and quickly swallowed half of the noodles. He chewed with his cheeks puffed out and asked Xu Yun in front of him:

"Xiao Xu, you said you want to subcontract part of the research project on solitary point particles?"

Xu Yun nodded and handed over the sketch he had originally prepared:

"Well, look at this."

Mentioned earlier.

Xu Yun's idea is actually very simple:

Relying on the static mass-free characteristics of solitary point particles, the ultra-cold chain rubidium atoms are replaced to achieve a higher-precision measurement feedback effect.

Therefore, Academician Pan just took a few quick glances and understood all Xu Yun's thoughts and put it aside.

Tuk tuk tuk——

I saw Academician Pan's index finger tapping rhythmically on the table, and his whole face looked thoughtful.

After a few seconds.

He looked up at Xu Yun and said thoughtfully:

"Xiao Xu, judging from the drawings, there is indeed no big problem with your idea."

"But you should know that whether a project is approved or not cannot be determined by just two words, 'idea'. It requires more comprehensive and feasible steps to be customized."

"For example, let me ask you, how are you going to make the isolated point particles form a quantum state?"

Academician Pan's expression was solemn, and he had no intention of letting Xu Yun go and taking care of his disciples.

Still taking the rubidium atom as an example.

The first time rubidium atoms obtained a Bose-Einstein condensate can be traced back to 1995, when Wolfgang Ketterley of the Massachusetts Institute of Technology and Eric Cornell of the University of Colorado, Boulder, at 170nK This achievement was achieved at low temperatures.

since then.

Rubidium atoms have just begun to be widely used in laboratories, and 15 years later they successfully left the laboratory and appeared on the gravity gradiometer.

But

Behind such a simple description lies the sweat of countless predecessors and the extremely high difficulty of preparation.

This is true for rubidium atoms, and it is also true for solitary point particles.

If solitary point particles want to replace rubidium atoms in the gravity gradiometer, or to put it bluntly, if solitary point particles have the possibility of adapting to the gravity gradiometer, Xu Yun must solve one of the most basic problems: < br>

How to create a quantum state like rubidium atoms?

If we can't do this, everything will be empty talk.

Academician Pan would never agree to Xu Yun's project.

In other words.

This question raised by Academician Pan can be regarded as an ‘interview’ to a certain extent.

"Formating a quantum state?"

After Xu Yun and Zhao Zhengguo discussed the idea of ​​establishing the project yesterday, he thought about the practical aspects at night.

Although there are still many problems with no results, there are still some solutions to the threshold that must be crossed in the quantum state:

"Teacher, this is what I think."

"We can put a Zeeman reducer on the device and make a resonant transition with the particle through a counter-propagating laser beam."

“In this way, suitable solitary point particles can be preliminarily screened out and its particle number distribution at each energy level can be determined.”

"Then according to Bose's statistical theory, after we know the particle number distribution of each energy level, we can use the density of states to convert the sum into an integral to calculate the total number of particles."

“Then comes orbital coupling.”

"At present, we have achieved certain results in one-dimensional artificial spin-orbit coupling in China, so if we can complete the spin-orbit coupling of isolated point ions in more than two dimensions, I think it should not be a problem to complete the quantum state."

Academician Pan gradually slowed down in tapping his fingers on the table, and finally fell into deep thought.

Mentioned earlier.

The so-called Bose-Einstein condensation is the sudden "condensation" of atoms in different states into the same ground state.

And this ground state is actually a quantum state.

Therefore, a lot of the physical research on ultracold atoms belongs to the field of quantum or Academician Pan’s research.

For example, the spin-orbit coupling mentioned by Xu Yun.

Achieving artificial spin-orbit coupling in ultracold atoms and studying novel quantum states is currently one of the most important cutting-edge topics in ultracold atomic physics.

In 2016.

HKUST once cooperated with the Peking University Theory Group to propose and construct a two-dimensional Raman coupled optical lattice, realizing a two-dimensional spin-orbit coupled topological quantum gas.

Not long ago.

Professor Liu Xiongjun from Peking University’s Center for Physical Materials also proposed a new Raman optical lattice scheme based on three-dimensional spin-orbit coupling and an ideal Weyl semimetal based on the original two-dimensional system, and published it in Science (doi: 10.1126/science.abc0105)

Having said that.

Academician Pan is also the corresponding author of that paper.

So he knew very well

The idea mentioned by Xu Yun is indeed quite feasible.

So he and Zhao Zhengguo looked at each other and asked Xu Yun again:

"Xiao Xu, how many tasks are you going to subcontract this time?"

Xu Yun scratched his hair twice, lowered his eyelids, and said thoughtfully:

"Let's set up two topics, one is the ground state processing of isolated point particles, and the other is the application of the measurement module of isolated point particles."

"In this way, even if I encounter the worst situation, I can at least ensure that the first project can be completed smoothly and the whole army will not be annihilated."

Zhao Zhengguo, who was listening in, nodded slightly.

Project subcontracting has always been a practice that is prone to criticism.

Especially when the subcontractor is still his own student, there will be speculations and even assumptions and slanders from inside and outside the group.

Although neither Academician Pan nor Zhao Zhengguo paid much attention to these criticisms.

But if there is an opportunity to prove their ‘innocence’, they will naturally not refuse it.

Xu Yun now divides the project into two parts, the former is relatively easy and the latter is more difficult.

This way.

Even if Xu Yun only breaks through the first topic, he can still silence many people:

The 'simple' processing of ground state processing of isolated point particles is relatively speaking. If this technology can really be realized, Xu Yun will definitely be able to get into the journals of the Second District of the Chinese Academy of Sciences.

If a master's degree subcontracts a certain project, and the result is sent to the second district paper, even if it is submitted to the Kingdom of Light, it will be a real outstanding achievement.

However, Academician Pan's face was still calm at this time, and he could not see the joy or anger in his heart, but continued to ask:

"What about equipment and funding?"

Xu Yun suddenly turned pale.

The main event is here.

I saw him slapping his chest heavily with an expression on his face that said, "Our company is rich":

"Teacher, don't worry about the funding. You don't need to be the first batch. We at Huadun Biotech can pay for this part of the money ourselves."

"In addition, if there are additional work losses or electricity expenses, we will also cover them all. If necessary, we can even pay from my personal account."

However, after being so heroic for two seconds, Xu Yun's eyes became a little weak:

"As for the equipment, well, it might cost a little over 100 million."

Academician Pan didn't notice anything unusual in Xu Yun's words, so he continued:

"Say it."

Xu Yun looked at his teacher hesitantly, and finally felt relieved and said:

"The Zeeman reducer is definitely needed, and the magneto-optical trap is also indispensable."

"In addition, non-chain DF laser P-polarized ArF excimer laser large-angle anti-reflection film and colloidal PbSe quantum dot-doped liquid core fiber are needed.

".And MeV-UEDLinseisCG790 - or 680 will do"

Less than half a minute later.

Academician Pan glanced at Xu Yun who closed his mouth again:

"Finished?"

"Well, that's pretty much it."

"."

The muscles on Academician Pan's face twitched several times, and a rare hint of speechlessness appeared on his usually gentle face:

"How about Xiao Xu, the school and I make a suggestion and transfer the ownership of the Synchrotron Radiation Center to you? It will be done within three days!"

Xu Yun subconsciously wanted to reply that it did not include holidays, but considering that saying that might cause his tutor to clean up the family on the spot, he obediently lowered his head:

"Teacher, how about I leave it to you to decide on the equipment?"

"Leave it to me?"

Academician Pan sneered and saw through Xu Yun's little thought of retreating in order to advance:

"Okay, how about I arrange a refrigerator for you?"

"After all, they are all for cooling. The difference between minus 270 degrees and minus 2 degrees is only two numbers. How about I give you a diesel generator - I pay for it myself?"

Xu Yun:

"."

Then Academician Pan took another sip of Ban Mian, frowned and shook his head:

"Hey, just talking to you makes my face look lumpy."

"Forget it, I won't tease you anymore. The equipment will be reduced to 60% according to your needs. Is that okay?"

Xu Yun, who was hanging his head, was stunned when he heard this.

Cut to 60%?

Oh my god!

To know.

Many of the equipment he just proposed are among the major national scientific research instrument development projects!

He was just talking casually with the idea of ​​​​getting a few hits if there are jujubes or not. In fact, it would be very good if 30% of them can be approved by Academician Pan.

After all, in terms of status, Academician Pan can only be regarded as the leader in domestic quantum encrypted communications.

Even if the word encryption is removed, he may not be able to rank first.

This is true in the field of communications, let alone the world of quantum physics or theoretical physics.

So for Academician Pan.

There is nothing wrong with designating project subcontractors, but it may not be so easy when it comes to the allocation of some instruments.

This is the teacher.

And just when Xu Yun was secretly moved, Academician Pan's voice came to his ears:

"Of course, Xiao Xu, after giving you such a large discount, shouldn't the burden on your shoulders also be increased?"

Xu Yun: ".?"

Wait, what about the deep master-disciple relationship that was promised?

Without waiting for Xu Yun to answer, Academician Pan continued:

"The way I see it, Xiao Xu, the structural determination of isolated point particles, potential barrier drawing, polaritons, Gaussian Bose sampling, and spatial coherence are all left to you - of course, you will also be responsible for the results. How about the name?”

"."

Looking at Academician Pan with an old fox expression on his face, a cold sweat broke out on Xu Yun's face:

"Teacher, do you think too highly of me?"

Xu Yun's expression this time was not fake, he was really dumbfounded.

Academician Pan's previous structural fixation and potential barrier drawing were okay, but the last three starting from the polaritons were a bit outrageous

Such as polaritons.

Excitons conceptually refer to some quasiparticles abstracted from original excitations.

Most of the new quasiparticles produced through coupling are named polaritons.

For example, phonon polaritons generated by coupling of photons and phonons,

Exciton polaritons produced by coupling of photons and excitons,

Surface plasmon polaritons generated by coupling of photons and surface plasmons, etc.

If a photon can really couple with a solitary point particle, then it will produce a solitary point polariton.

The concept is not difficult to understand, but it is difficult to put it into practice

Put it this way.

This is a research project at the level of academicians of the Academy of Sciences—the kind that academicians personally carry out.

The following Gaussian Bose sampling and spatial coherence are almost the same.

As for Xu Yun’s abilities

Mentioned earlier.

After using Mavericks' thinking role card.

Xu Yun's abilities have probably reached the level of professors in unpopular majors and associate professors in popular majors in 211 colleges.

Now I have finished the wheat copy.

Xu Yun was roughly raised to the level of an ordinary professor through Gauss's teachings and daily discussions with Xiaomai, Lao Tang and others.

In addition, he still has some combinations of thinking cards that he has not used, and theoretically there is some room for improvement.

But

Xu Yun can guarantee it.

Even if he uses up all the thinking cards, his ability cannot reach the level of an academician - except for someone like Xie from Tobacco.

Therefore, he was not being modest at all. At this time, Xu Yun really had the urge to ask Academician Pan to recruit another Gao Ming:

"Teacher, how about."

As a result, before he could finish his words, he was interrupted by Academician Pan with a smile:

"Xiao Xu, why are you in such a hurry? I didn't ask you to do this alone."

"Don't forget, there is a talented person in this field at HKUST who has nothing to do recently."

"A capable person?"

There was a hint of astonishment on Xu Yun's face, and the words he originally wanted to refuse were stuck in his throat.

But soon.

A flash of lightning flashed in his mind:

"Teacher, you mean"

Academician Pan nodded slightly:

"That's right, it's Xiao Lu." (End of Chapter)