Chapter 207 Important Quantum Error Correction Problems
"Why has the situation in the community become stricter than before?" Xu Youxin said.
Xu You discovered that at the security office at the door, the security guards began to carefully check every person entering the community.
Although before, people entered and exited the community by swiping cards.
However, there are also cases where people who are not from the community use the cards for free.
This situation is very common in every community, and security guards generally don't care about it.
For those who don’t have a community card, the security guard will ask them to register before allowing them to enter the community.
Xu You thought that if every community had become like this, then maybe something that caused the overall community supervision to become stricter.
And if only my neighborhood is like this...
That's a completely different question.
Xu You didn’t think too much about it. After all, going back to study was more important.
After returning to his room, Xu You turned on the computer and began to organize the information sent by Han Shubin.
The information sent by Han Shubin were all various internal documents and literature.
Although the quantity is not particularly large, each piece of information is very valuable and is the kind that you can’t buy even if you want to.
However, the threshold for understanding the contents of these materials is very high and the content is very obscure.
It is impossible for non-professionals to understand it.
Of course, this is not a big problem for Xu You.
Although Xu You is not a professional researcher of quantum computers.
But Xu You has a certain understanding of many things.
Moreover, some of Xu You’s previous achievements were also related to quantum computers.
And Xu You can fully understand this kind of logical knowledge through his powerful brain.
Before you start studying.
Xu You prepared some chocolate and water on the side.
This is an experience Xu You summed up after experiencing so many deep learning states.
Being in a deep learning state for a long time continuously is a great test for Xu You's body.
But if the time for deep learning is dispersed, the effect will be greatly reduced.
During the learning process, proper replenishment of energy and water allows Xu You to persist for a longer period of time at a time.
Through practice, simple actions like eating chocolate and drinking water no longer distract Xu You.
After making sufficient preparations, Xu You began to study these materials.
It is very challenging to teach yourself this very obscure knowledge from scratch.
Even Xu You couldn't understand everything at once.
The method Xu You adopted was to study the materials quickly for the first time.
Make sure you understand most of the content, but if you come across something you don't understand, mark it down first.
The marking was just to make it easier for Xu You to find its location. At the same time, Xu You also wrote down this question that he didn't understand in his mind.
After finishing reading it for the first time, Xu You started from the beginning for the second time and thought about the marked places again.
With the accumulation of knowledge from the first time, solving these problems becomes much easier.
After a few days, except for a few exceptions, Xu You had understood most of the knowledge.
When he looked at the concept of "quantum error correction" again, Xu You had a deeper understanding.
It's like when two people are chatting by typing, it's inevitable that some wrong messages will be sent.
If it were minor issues, this error wouldn't be a big deal.
For example, A asks B, have you eaten?
B wanted to say that he had eaten it, but ended up answering that he hadn’t .
This will not cause any serious impact.
But if A asks B, should we press the button of this nuclear device?
At this time, if there is an error in the information input.
Typed "don't" as "yes".
That would have extremely serious consequences.
Therefore, we want to ensure that quantum computers can process information correctly.
Quantum error correction is a problem that must be solved.
A simple way to solve this problem is to repeat it.
Because the probability of sending the wrong message each time is relatively small.
By sending the same information repeatedly in large quantities and taking a larger amount of information as the result, the error rate can be greatly reduced.
Of course, in addition to this type of error, there are some more complex error types, and the error correction methods are also more complex.
After Xu You completed the study of quantum error correction.
There are still some individual pieces of knowledge that I don't understand very thoroughly.
Xu You decided to go to Han Shubin to ask for advice in person.
After telling Liu Jiao about his request, Xu You and Han Shubin made an appointment and went to Han Shubin’s office at the University of Science and Technology of China again.
It starts from when Xu You participated in the island project and met Han Shubin for the first time.
This is the fifth time the two have met.
Han Shubin was in a good mood when he saw Xu You.
"How is it? How do you like reading these contents?" Han Shubin asked with a smile.
“I have already taught myself the part about quantum error correction, but there are still a few questions I don’t quite understand.”
Han Shubin was very surprised to hear Xu You's answer.
Have you finished reading the part about quantum error correction in these few days?
You know, this is all the knowledge about quantum error correction that Han Shubin has been able to collect in the past few years.
Looking around the world, there is not necessarily anyone who has more information in related fields than Han Shubin.
If Han Shubin were to learn it from scratch...
It's hard to get started without a few months.
But as for Xu You, Han Shubin would definitely not doubt him, nor would he do something boring like testing Xu You with a few questions.
"Xu You, please tell me about your current problems."
"Okay, Academician Han."
Next, Xu You talked about several questions that had arisen in his learning process over the past few days.
Just from Xu You's questions, Han Shubin could be sure that Xu You had indeed understood most of the above knowledge.
If you are unable to understand so much knowledge, just browsing through the information.
It is impossible to raise questions of this level.
Every question raised by Xu You was the most difficult point in the materials.
And the reason Xu You didn’t understand was not because he lacked ability.
It is just because of the limitation of the material form that this knowledge is difficult to express clearly with words alone.
Just like what Xu You described in the mechanism of high-temperature superconductivity, even the top experts in the industry cannot understand it all.
After that, Han Shubin and Xu You communicated together for several hours.
Through face-to-face communication with Han Shubin, Xu You finally resolved several questions in his mind.
"Thank you, Academician Han. I now understand everything."
