Fuda,

Xu Mang stayed alone in the condensed matter physics laboratory and started researching graphene. Now he is quite miserable. He is the deputy director of the Department of Physics and a professor of theoretical physics. As a result, he does not have an assistant around him, let alone the assistant.

I do all the switching myself.

This deputy director,

This physics professor,

It’s so frustrating in front of me!

"well"

"What a tragedy." Xu Mang sighed, glanced at the empty laboratory, and felt a chill in his heart. Although he had done many things himself before, he had to let others do the experiments. After all, he was doing theory.

Yes, it turns out that now I even have to do the experiments myself.

actually,

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

According to traditional tunable qubits, a current loop generates a small magnetic field, which causes electrons to bounce back and forth between materials, causing the qubit to switch states.

This is the structure of the Josephson junction that Xu Mang deduced from the quantum chip given by Deputy Director Hao Ren. The insulator is sandwiched between two materials.

but,

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

How to solve it?

Xu Mang was caught in a conflict. He thought about it and used the materials database to select a two-dimensional magnetic material, van der Waals. This material is only atomic in thickness and can be stacked together like stacked logs.

Constitute an electronic system.

Unfortunately, Xu Mang checked the papers on van der Waals materials. This material is basically used for magnetism, and there is almost no research on quantum circuits. Xu Mang can infer that van der Waals materials do not have temporal coherence.

My thoughts stopped a bit, and then I felt like I had diabetes.

Oh my god!

Is this a joke?

Xu Mang's scalp was numb from the torture. He originally thought it was quite simple, but when he got started, he found out that it was as difficult as a dog!

"Hello?"

"What are you doing?" Xu Mang received Chen Xi's call and asked with a confused face: "If you ask about feelings or anything like that, please call your sister Xiaoman. She is an emotional expert who specializes in helping those who are lost on the emotional road.

Couples on the Internet can give you some tips.”

""

"Brother Xu Mang, don't make trouble!" Chen Xi said awkwardly, "If you tell Sister Xiaoman, I'm afraid she will kill you."

Xu Mang:???

Isn't that the case?

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

wrong!

Could this guy have broken up with Guo Tianmei?

"you"

"You shouldn't have broken up with Guo Tianmei, right?" Xu Mang asked in horror: "If you really break up, you have to make it up to others. At least Guo Tianmei changed her choice for you.

Go and study."

Chen Xi sighed and said helplessly: "We haven't broken up yet, but we had a big quarrel with her today."

"What did you quarrel about?" Xu Mang asked.

"It's a big deal, but we got into a fight as we were talking. Brother Xu Mang, have you ever encountered a time when Sister Xiao Man was unreasonable?" Chen Xi asked curiously: "How did you solve it then?

?”

"hehe"

"Of course I'll beat her up!" Xu Mang sneered and said viciously: "Don't you know what my character is? Not to mention one Yang Xiaoman, three Yang Xiaoman dared to be presumptuous in front of me, and they also beat her up, don't

Seeing how you, Miss Man, show off your power, at home I am the emperor!"

at this time,

Xu Mang became very interested and began to brag about his glorious history to Chen Xi.

"Usually I let her go and give her some face, but at home I asked her to go east, but she didn't dare to go west, and I asked her to go left, but she didn't dare go right." Xu Mang said with a proud face:

"She wanted to hug me last night, and I told her seriously, please go away!"

"Listen!"

"What a righteous statement!" Xu Mang's vanity was greatly satisfied, and he said enigmatically: "Don't say these things I just told you to your little sister Man, otherwise she will die of shame.

"

Chenxi:

just

What happened?

Is Brother Xu Mang being controlled so strictly by Sister Xiaoman that he is hallucinating?

"I"

"Brother Xu Mang?" Chen Xi asked cautiously, "Have you never considered breaking up?"

separate?

Well

Xu Mang couldn't help but touched his neck, and said with a smile: "You, Miss Man, are quite nice."

Chen Xi opened his mouth but said nothing.

soon,

The call was interrupted, and Xu Mang's expression gradually became serious. He was worried that Chen Xi would be leaked.

never mind,

If you exercise for an extra hour, everything will come back.

Returning to graphene, Xu Mang searched for materials again. Finally, after spending an hour, Xu Mang chose hexagonal boron nitride to clamp graphene. Through his careful calculation, when hexagonal boron nitride clamped graphene

Finally, the qubit can have ideal ballistic transmission without scattering.

"well?"

"It seems that there are not enough qubits!" Xu Mang frowned. After analyzing and calculating the experimental data, he found that the number of qubits was pitiful and could only accommodate five qubits.

what to do?

If this kind of graphene quantum chip is finally successful, it can accommodate only four qubits, which means that we will have to create a thousand chips. Just kidding, the integration of 800 chips will take at least 100 million years!

In desperation,

Xu Mang made a call to Hao Ren, deputy director of the Supercomputing Center of the Academy of Sciences, and asked about the scaling issue of quantum chips.

"Hello?"

"Director Hao?" Xu Mang asked with a smile: "Yes, yes, it's me. Then what? I'm about to develop a quantum chip."

Hao Ren:???

I

this

How long has it been since the project was established?

This successfully developed a chip with four thousand qubits?

"Professor Xu?"

"You're not kidding me, are you?" Hao Ren asked in horror: "The development was successful?"

"No no no!"

"Don't get me wrong. It's only one thousandth completed." Xu Mang said awkwardly but politely: "The results I obtained through experimental calculations using graphene are similar to the samples given to me by the Academy of Sciences, but the number of qubits is different.

There are only four of them."

Hearing Xu Mang's words, Hao Ren almost went crazy. Although it was only four qubits, you must know that Professor Xu started from scratch, relying on a sample chip, and then fiddled with the quantum chip by himself?

Hao Ren had heard in the past that Xu Mang's research speed was very fast, and his eyes would come out as soon as he closed and opened them. Who knew it would be so fast?

"Professor Xu?"

"Can the finished product be sent over in the future?" Hao Ren asked seriously: "This is the first time I have heard that quantum chips can be developed using graphene. We have considered it before, but how to solve the problem of coherent temporality?"
To be continued...