Chapter 590

At Fuda,

Xu mang stayed alone in the laboratory of condensed matter physics and started his research with graphene. Now he is quite miserable. He is deputy director of the Department of physics and professor of theoretical physics. As a result, there is no assistant around him, let alone an assistant... He even pushes the switch by himself.

The deputy director,

the physics professor,

is really holding back!

"Alas..."

"the tragedy of taitema." Xu sighed blankly and took a look at the empty laboratory. Although a lot of things were done by ourselves before, experiments were done by others. After all, he was engaged in theory. As a result, he has to do experiments by himself.

In fact,

it is not difficult to prove the coherence time of graphene qubits. As an authoritative figure in graphene field, Xu mang almost thought of the corresponding method last night. The difficulty is how to use graphene to construct complex quantum circuits.

According to the traditional adjustable qubit, a small magnetic field will be generated in the current loop. The magnetic field makes the electrons bounce back and forth between the materials, thus making the qubit change state.

This is the structure of Josephson junction deduced by Xu mang from the quantum chip given by deputy director Hao Ren. The insulator is clamped by two materials.

However,

in reality, Xu found that the energy consumption to achieve this form of qubit state transition is very high, and may lead to other problems.

How to solve it?

Xu mang was caught in a contradiction. With the help of the materials science database, Xu mang selected a two-dimensional magnetic material van der Waals. The thickness of this material is only atomic size, and can be stacked together like building blocks to form an electronic system.

It's a pity that Xu mang has checked the papers on van der Waals materials, which are basically used for magnetism, and the research on quantum circuits is almost blank. Therefore, Xu can infer that van der Waals materials do not have time coherence.

The idea is a little broken, and then it's like diabetes insipidus.

Oh, my God!

Is it funny?

Xu mang was tortured by scalp numbness, originally thought it was very simple... Really started to find, as difficult as a dog!

"Hello?"

"What are you doing?" Xu mang received Chenxi's phone call and asked in a confused way: "if you ask about feelings, please call your little sister man. She is an expert in emotion. She is specialized in helping couples lost in the emotional road to point out where they are."

"..."

"brother Xu Mang, don't make trouble!" Chen Xi embarrassed said: "with the words of sister man, I'm afraid she will be killed."

Xu Mang:???

After all, you are the first one to call her sister.

No!

This kid... Shouldn't break up with Guo Tianmei?

"You..."

"you won't break up with Guo Tianmei, will you?" Xu mang asked in horror: "you... If you really break up, you can make up for others. At least Guo Tianmei has volunteered to study in Jinan University for you."

Chen Xi sighed and said helplessly, "I haven't broken up for the time being, but I have a big fight with her today."

"For what?" Xu asked.

"Sesame and mung bean point big thing, the result said said to quarrel, Xu mang elder brother... Have you met little man elder sister unreasonable time?" Chenxi asked curiously, "how did you solve it at that time?"

"Ha ha..."

"beating her, of course!" Xu mang sneered and said bitterly, "don't you know my character? Don't talk about one Yang Xiaoman. Three Yang xiaomans dare to be presumptuous in front of me and beat them together. Don't look at your sister Xiaoman's usual arrogance. At home, I'm the emperor

At this time,

Xu mang became very interested and began to boast his glorious history to Chenxi.

"Usually I let her, give her a little face, but at home... I let her go east, she dare not go west, let her go left, she dare not go right." Xu mang face arrogantly said: "last night she wanted to hold me, I told her seriously, please go away!"

"Listen!"

"What righteous words Xu Mang's vanity has been greatly satisfied, enigmatic said: "just I told you these words, don't say to your sister, otherwise... She will die of shame."

Chen Xi: (￣ △;)

what happened just now?

Xu mangge is not small man elder sister tube is too strict, all appear hallucination?

"I..."

"brother Xu mang?" Chen Xi asked cautiously, "have you not considered breaking up?"

Break up?

Er...

Xu mang couldn't help touching his neck and said with a smile, "your little sister man is very good."

Chen Xi opened his mouth and did not speak.Soon,

the call was interrupted, and Xu Mang's expression gradually became serious. He was worried that Chen Xi would leak out.

Forget it,

exercise an hour more and everything will come back.

After returning to graphene, Xu mang searched for materials again, and finally spent an hour. Xu chose hexagonal boron nitride to clamp graphene. Through his careful calculation, when hexagonal boron nitride clamped graphene, it could make quantum bits have ideal ballistic path transmission, and there would be no scattering.

"Ah?"

"It seems that there are not enough qubits." Xu mang frowned, through the analysis and calculation of experimental data, this qubit is pitifully small, only can only hold four qubits.

What to do?

If this kind of graphene quantum chip is finally successful, it can only hold four quantum bits, which means that we have to make a thousand chips by ourselves. We are joking that it will take at least 100 million years to integrate a thousand chips!

In desperation,

Xu mang called Hao Ren, deputy director of the Supercomputing Center of the Academy of Sciences, to ask about the scaling of quantum chips.

"Hello?"

"Director hao?" Xu mang asked with a smile: "yes, yes, yes... It's me. What... I'm about to develop a quantum chip."

Hao Ren:???

I...

this...

how long has the project been established?

So we have successfully developed a chip with 4000 qubits?

"Professor Xu?"

"You... You're not kidding me, are you?" Hao Ren asked in horror, "is this successful?"

"No, no, no!"

"Don't get me wrong... It's only one in a thousand." "I use graphene to calculate the results through experiments. The principle is similar to that of the samples given to me by the Academy of Sciences, but... There are only four qubits in the number of quantum bits."

After hearing Xu Mang's words, Hao Ren is going crazy. Although it's only four qubits, Professor Xu starts from scratch, relies on a sample chip, and then makes a quantum chip by himself?

Hao Ren has heard that Xu Mang's research speed is very fast, and he comes out as soon as his eyes are closed. Who knows... It's fast to this point.

"Professor Xu?"

"Can we deliver the finished products in the future?" Hao Ren seriously asked, "I heard for the first time that quantum chips can be developed with graphene. We have considered it before, but... How can we solve the problem of coherent temporality?"

Xu mang said seriously: "no comment, the finished product can not give you, only the relevant data can be provided."

"..."

"OK." Hao Ren said helplessly, "please send me a copy of the data, please."

"Yes

"But... Can you tell me how to solve the problem of quantum chip scaling?" Xu asked.

"Voltage control."

"According to our research, voltage control can scale qubits while eliminating crosstalk problems." "But... Whether this technology can be used in graphene quantum chips is questionable," Hao said

"Yes

"Voltage control reduces the lifetime of qubits."

Ah?

To reduce life?

Xu mang frowned, which is really very uncomfortable, even if the qubit is amplified to a limit, the result can only take one minute, that is no... it seems that he needs to think from other directions.

Hang up the phone,

Hao Ren is anxiously waiting for Xu Mang's data. Ten minutes later, Hao Ren receives an email.

Open it and read it immediately. In a few minutes, he was convinced by Xu Mang's amazing operation.

Sure enough!

Sure enough!

Deputy director Hao Ren guessed Xu Mang's R & D experience. In fact, this is similar to the 20 qubit chips developed by the Academy of Sciences, which adopts the superconducting circuit mode. However, in a strict sense, the chip developed by Xu mang is not a quantum chip in the true sense. Everything depends on the calculated data.

But for Hao Ren, this is enough.

How did he...

do he do it?

For a moment,

Hao Ren picked up the landline and dialed a number. As a result, he hung up in a hurry the next second.

Don't put pressure on Professor Xu!

At night,

night,

finally, Xu mang just took a bath and lay on his bed. Facing the problems encountered today, how to improve the qubits of graphene quantum chips developed by himself, and how to form a complex superconducting circuit mode.

"Ah?"

"Big fool?""Discuss one thing with you." After taking a bath, Yang Xiaoman wiped his hair and said to Xu mang carelessly, "do you have time the day after tomorrow? I'll take three days out for my mother to accompany me to pretend

Xu Mang:???

What?

I'm going to play with you?

"Ah?"

"You... What do you want to do?" Xu asked curiously, "I've been very busy recently... The quantum chip has been stuck for a week. At present, only a breakthrough from zero to one has been completed, and even the breakthrough is not counted. I really have no time."

Yang Xiaoman tooted his mouth. She knew that Xu mang was very busy recently and had a lot of worries all day. However, her biggest enemy in life and a group of hateful pretending criminals were waiting for him to make a fool of himself.

What can I do?

"Husband ~"

"give people some time Yang Xiaoman walks to Xu Mang, shaking his hand vigorously and pleading all over his face: "even if you are busy again... There is still time for crowding."

"Cut!"

"Are you so flat that you can squeeze out?" Xu mang said with a disdainful face.

Yang Xiaoman: (* ~ ＾)

toast without eating and drinking,

I will help you!

After a violent beating, Xu mang became more honest. He shrunk his head and asked carefully, "what's the matter with Xiaoman?"

"Don't ask!"

"Anyway, you will accompany me to Maldives."

"After that, you only need to do one thing!"

"Loading ratio

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