I really don't want to lie down and win

Xu Mang:? ? ?

Ugh?

This... this is so familiar!

Xu Mang asked cautiously, "Director Xia...who did you find?"

"I?"

"I found my old senior, who is now the deputy director of the Supercomputer Center of the Chinese Academy of Sciences." Xia Qing said seriously, "His words are more believable... I'm sorry... Xu Mang, this Something didn't work out for you."

"..."

"Oh...hehe." Xu Mang smiled, and said calmly: "I thought it was something, didn't it mean that I didn't have relevant experience and experience, this thing...is not available every minute, Director Xia, don't worry , it’s not really a big problem.”

Hearing Xu Mang's words,

Confusion was written all over Xia Qing's face, why... why does it feel like Xu Mang didn't take it seriously at all!

Is this the heck?

"Xu Mang?"

"You...what's the matter with you?" Xia Qing asked worriedly, "I don't know how crazy you are as a director?"

"What's crazy...I'll tell you the truth." Xu Mang said calmly, "I'm writing a thesis on quantum computers, and I'll finish it soon...by then this thesis will become experience and experience." .”

Xia Qing was taken aback: "You...you're not joking?"

"I never joke about this kind of thing." Xu Mang said seriously, "Don't worry...a small problem."

moment,

There was a silent voice on the other end of the phone.

"..."

"Then work hard!"

words fell,

The two cut off the phone call.

Looking at the hung up call interface, Xu Mang was silent for a long time, and then returned to the direct discussion.

This essay by Xu Mang is mainly about how important quantum error correction is. At present, all qubits have more or less noise interference. This kind of noisy quantum computing unit is called a physical bit, and a physical bit Inherently flawed, quantum computing with a high error rate cannot be realized.

The simplest is Schur's algorithm.

How to do?

Xu Mang's answer is very simple...Using quantum error correction, a large number of noisy physical bits are used to represent the information of a bit through an appropriate encoding form. This kind of qubit is also called a logical qubit.

pity...

There is a huge difficulty in this. There is a very important difference between the quantum world and the real world. Observation will lead to changes in the quantum state, forcing the quantum state to project onto the eigenstate of an operator related to the observation.

And this kind of change is irreversible. Once it happens...it can never go back, so some information will be completely lost.

And what Xu Mang wanted to solve... happened to be this problem.

How to do?

He found a lot of relevant theories, including those published by Google and IBM. These American institutions did not publish relevant theories, and kept quantum computing at the level of physical bits. So far...Xu Mang has become a blind.

he...

I can no longer cross the river by feeling the eagle sauce.

"Ugh..."

"No. [-] in the world... so it's not so easy to be." Xu Mang sighed. In the future, if Huaguo leads the United States in technology, it will encounter many similar problems and cannot see the road ahead. At present You can still cross the river by feeling the eagle sauce, what if there is no eagle sauce?

"Could it be that this group of people... hid it on purpose?" The more Xu Mang thought about it, the more he felt it was possible. It's impossible that there are no related theories in the world, unless... the American National Defense Department hides the relevant content.

or...

find it?

Xu Mang's hands started to get a little dirty. He was going to use hacking techniques to find the theory of quantum error correction, not to mention... After half an hour of hard work, he really found the coding method of quantum error correction, and There are many ways.

However, no matter what kind of scheme, there is a basic requirement for the error rate of a single physical bit, which is about one error in 100 million times.

The basic idea is to entangle one qubit with many other qubits, and then only look at those bits that do not contain information. Although no information can be measured, the measurement results can show parity changes.

No!

Xu Mang was very dissatisfied with these plans. Although CSS code and Shure code were classics, Xu Mang thought that these two codes were not easy to use.

"Ouch!"

"Go to hell..."

Xu Mang silently turned off his computer. At the thought of encoding quantum entanglement, Xu Mang's head exploded. It wasn't that he couldn't... but that he was worried about losing his hair. Not every bald head is Qi Teacher Yu, it may also be Nicholas Zhao Si.

lying down

Lying so still,

Xu Mang lay down until 04:30 in the afternoon, and then Xiaoman came to call him home with light steps...

"..."

"Hey?"

"I mean, you won't lie down all afternoon, will you?" Seeing Xu Mang's decadent look, Yang Xiaoman was so angry that he smoked, and said, "Aren't you working? Even in order not to affect your work, you even put your old lady I rushed out, why...why did you suddenly look like this?"

Xu Mang sighed, and said calmly: "Life is full of despair. You said that I finally came up with a solution to a problem. I just started writing for less than a minute, and I discovered that there are countless problems behind the problem."

"oops..."

"Then solve it slowly... my husband!" Yang Xiaoman threw herself on Xu Mang with a smile. This time...Xu Mang's mind wandered off. "Honey...I want a cat."

"cat?"

"What kind of cat?" Xu Mang asked curiously, "Is it the Taibai cat who owes nothing?"

"no!"