america,

Universal Business Machines Corporation Headquarters,

This is the world's largest information technology and business solutions company. It is usually called IBM by others, and it owns many heavyweight laboratories, including quantum computer experiments. IBM has a very good reputation in the field of quantum computers.

Performance.

Unlike Google,

IBM proposed the concept of "quantum advantage" to demonstrate the ability of quantum computing to surpass classical computing for real application scenarios. The implication is that quantum advantage must not only reflect the overwhelming computing power, but also be useful.

According to what IBM believes is Moore's Law in the quantum era, quantum volume will double every year, and quantum advantage is expected to be achieved in the 2020s.

IBM defines an indicator of "quantum volume", which is a parameter related to the number of active qubits and the error rate. The more qubits there are and the lower the error rate, the larger the quantum volume.

therefore,

There is a sharp contrast between IBM and Google in the field of quantum computers. The emergence of Google's quantum supremacy only increases confidence in the technology and industrial circles. It does not bring real commercial value, because Google uses it to demonstrate quantum computing.

Hegemonic algorithms are meaningless.

However, quantum advantage is working hard to achieve commercial value. No one can predict when it will arrive. It is necessary to find a quantum algorithm with practical value and demonstrate it, but this is not easy.

Orkney is the head of the IBM Quantum Computer Laboratory. He just arrived at his laboratory, and the next second he was approached by his colleagues.

"What?"

"China has developed a chip with fifty qubits?!" Orkney looked at his colleagues in horror. At this time, he was greatly shocked. In the field of quantum computers, China basically has no

What a sense of presence.

"Everyone is reporting on this now." The bald middle-aged man said seriously: "Orkney, please read the news."

moment,

Orkney saw the news about China's fifty qubit chip. When he knew it was Xu Mang, he couldn't describe the shock.

"this"

"This is so surprising that he came to the field of quantum computers quietly."

"Is it graphene again? He solved the 'coherence time' of graphene qubits? How on earth is this done? I remember that although graphene has been studied in superconducting quantum computing devices, coherence has not yet been addressed

Recorded reports that Xu Mang actually solved it?"

"Xu Yang structure?"

"What kind of existence is this?"

Too many doubts filled Orkney's mind, making him feel suffocated for a while.

"Orkney?"

"What should we do now?" the middle-aged man asked: "If the reports are true, then the team led by Xu Mang will be on the same ladder as us."

"Won't."

"Currently, the research results in this area have not appeared before our eyes. It is a bit unrealistic to rely solely on news media reports." Orkney said seriously: "And our fifty-three qubits

The quantum cloud computing service is about to be completed, and by then we will still maintain our number one position in the world in terms of applications."

Although China is shocked by China's huge leap in the field of quantum computers, Orkney still has a lot of doubts if it relies on news reports. The most perfect solution is to provide relevant evidence.

As for the ranking issue, Orkney is not worried that China will surpass itself. Fifty quantum chips only have the ability to join the field of quantum computers. But in terms of application issues, IBM occupies the absolute height.

According to the layout,

Quantum cloud computing services will be the perfect embodiment of realizing business value.

"if"

"In the future, Xu Mang develops more qubit chips, so how should we deal with it?" The middle-aged man frowned: "We have no relevant response methods. Once such a situation occurs, we can only watch him.

Become number one in the world.”

"Won't!"

"Including our competitor Google, we have only achieved a maximum of fifty-three qubits, and fifty-three qubits is the limit in a short period of time." Orkney said with certainty: "It will not exceed this value.

"

Facing Orkney's statement, the middle-aged man nodded. Although it has been rumored that Google is testing a chip containing seventy-two qubits, there has been no news about this news and the past two months.

The so-called quantum error correction in the true sense is always a concept.

at the same time,

Google Quantum Computer Research Lab.

A group of people were in shock. Many people expressed doubts about China's achievements. In addition to their own sense of superiority, it was also because no relevant professional research reports were provided.

"Fake!"

"They are good at making fakes." A young-looking man said disdainfully: "According to my understanding of China, they do not have the ability to study fifty qubit chips."

In many reports, China and Xu Mang have been questioned. Among them, CNN, which Xu Mang praised as junk media, is the American Cable News Network, which specifically targeted China's fifty qubit chip.

Exclusive report.

And the content inside

Xu Mang was criticized for being worthless, and by the way, he belittled the country of China.

"I think"

"This issue needs to be treated rationally." A young woman said: "Xu Mang is a famous scientist and has an authoritative voice in many fields. Since he developed it, I think there is a high probability that this news is true.

of."

Regarding whether the news is true,

It is roughly divided into three categories. Some people think it is true, some think it is fake news, and some are waiting and watching.

soon,

The topic was over, and everyone started working intensely again, but there was a middle-aged man who kept watching the news, his brows furrowed from the beginning. He was the head of the research laboratory, Professor Merck.

"How is that possible?"

"Not long ago, Hua Guocai uploaded an article on arxiv about the problem of boson sampling of state space in a sixty-mode interferometer with twenty input photons."

"Why are there suddenly another chip with up to fifty qubits launched?"

Professor Merck fell into deep thought. Could it be that the team that uploaded an article on arxiv was obviously not Xu Mang? This shows that China attaches great importance to quantum computers.

before that,

Professor Merck is not worried about being surpassed. After all, in this field, Google and IBM have monopolized all related technologies. But now it is different. Someone he least wants to meet suddenly breaks into the field of quantum computers.

Fifty qubits,

He actually got a ticket for 'Quantum Supremacy'.

"Damn it!"

"How is this done?" Professor Merck frowned. Through the fragmentary content, he learned that Xu Mang relied on graphene and used a 'Xu Yang structure' to realize the qubit, and the content only ended here.

.

at this time,

Professor Merck is very depressed. He has previously studied the application of graphene in quantum computing devices, but he and his team were unable to solve the temporal coherence problem.

However, I never expected that Xu Mang from China actually solved this problem and also used a method called "Xu Yang Structure" to directly implement qubits on graphene. What is going on?

What is Xu Yang’s structure?

At this time,

Professor Merck thought of a terrible thing. It was possible that Xu Mang had found a structural form that surpassed the Josephson junction.

Bang bang bang,

There was a knock on the office door, and a young man appeared in front of Professor Merck.

"professor!"

"Our 'bristlecone' chip has encountered a little trouble." The young man said helplessly: "Theoretically, the matrix arrangement of near-neighbor coupling is a necessary condition for surface-encoded quantum error correction, but in terms of packaging technology, it seems that

Restricted."

"What?"

"Isn't flip-chip soldering also possible?" Professor Merck asked in surprise.

"right!"

"We found many problems during welding, mainly in materials." The young man glanced at Merck and said cautiously: "We are missing a material. Although the material structure has been roughly determined through experiments,"

pause for a moment,

The young man continued: "But we don't have a very critical glue."

"Adhesive?"
To be continued...