There was a strange silence on the other end of the phone.
It was like there was no signal; there was no sound at all.
However, just when Lu Zhou hesitated for a moment and was about to remind Director Li that he was still on the phone, there was a thud on the other end of the phone, as if something had fallen on the table.
The phone was picked up from the coffee table in a hurry.
"What are you doing, Old Liu —"
"What did you say? The topological quantum computing problem is solved? What problem? How did you deal with the decoherence problem? And the Hall effect — "
When Lu Zhou heard the excited and unfamiliar voice on the other end of the phone, he paused for a second and frowned.
"Who are you?"
The voice paused for a second.
After taking a deep breath, the voice calmed down.
"I'm Liu Changqing from the Institute of Semiconductors at the Chinese Academy of Sciences! If it's convenient, Academician Lu, please explain to me. "
Academician Liu.
When Lu Zhou heard this name, he thought for a second and had a look of realization on his face.
Deputy director of the Institute of Semiconductors at the Chinese Academy of Sciences, director of the IC design center, head of the national "quantum control and quantum information" project, and one of the experts involved in the Dragon series of chips.
He had heard Professor Wu Tianqun mention this name several times before. Even though he had never met Liu Changqing in person, Lu Zhou knew that Liu Changqing was a big name in the Chinese semiconductor industry.
"… Simply put, I used a special insulator material that contains Majorana fermions to solve the problem of unstable qubit entanglement states."
"Wait a second, can you be more specific? I know the characteristics of Majorana fermions, but I don't care how you found this thing in the insulator material … How did you solve it? "
The voice on the other end of the phone was incoherent.
When Lu Zhou heard this series of questions, he sighed and spoke concisely.
"It's too troublesome to talk over the phone. If you're interested, come to Jinling."
…
Lu Zhou didn't expect Academician Liu to be so efficient. The next day, he arrived at Jinling from Beijing.
Academician Liu wasn't the only one who came; Director Li and experts from the Institute of Semiconductors of the Chinese Academy of Sciences were also there.
Lu Zhou smiled and didn't say anything. He brought them to a multimedia room and stood in front of a whiteboard.
"… Before we begin, we must first clarify a basic concept. The topological properties of matter will not change because of continuous stretching or bending, unless it is torn or connected to a new place. "
Academician Liu pushed up his glasses and spoke solemnly.
"We know all this … and then what?"
"This concept is the same when it comes to quantum mechanics … Of course, these are all very basic things. What is not basic is how we use this series of properties to achieve the results we want."
With that said, Lu Zhou turned around, picked up the electronic pen, and waved it at the whiteboard twice. The six grid-like lines seemed to grow out of the white panel and were directly printed on the whiteboard.
All of the experts from the Chinese Academy of Sciences, including Academician Liu, looked at this sci-fi scene with a look of surprise on their faces.
Lu Zhou noticed the expressions on their faces and spoke with a smile.
"This is a gadget I made in my spare time. It's mainly for the convenience of writing on the blackboard … After all, many things in physics are different from mathematics. Many things don't look so intuitive. A convenient blackboard tool can at least save me time with a ruler and eraser."
In fact, this thing didn't have any special technical content. It was just a whiteboard with touch control and display functions, and a smart camera with motion recognition function. A long time ago, something similar had appeared in MIT classrooms, but it wasn't as versatile and flexible as Lu Zhou's.
"Back to business. Let's go back to our previous topic." The electronic pen in his hand gently tapped on the whiteboard. Lu Zhou continued, "The key to solving the problem of quantum computing is how to overcome the interference of environmental noise on subatomic particles and prevent qubits from collapsing under environmental disturbances."
The second he finished speaking, he waved the electronic pen in his hand.
The electronic pen was like a conductor's baton. Under its command, rows of neat black dots quickly appeared on the six-grid-covered whiteboard.
These black dots represented subatomic particles, which revolved around invisible circular orbits and moved at uniform speeds.
Everyone in the audience stared intently at the whiteboard.
"… This quantum system is naturally immune to decoherence, and it can accurately execute preset algorithms."
"After saying so much, I'll just demonstrate it …"
Lu Zhou waved his hand toward the door. A drone flew over and placed a small box firmly in his hand.
Lu Zhou shook the box in his hand and gently placed it on the table.
"This is a simple scientific calculator. According to the program I compiled in advance, it can only do one kind of calculation … By the way, did anyone bring a computer?"
Academician Liu didn't know what Lu Zhou was up to, but he hesitated for a second and nodded.
"I brought it."
"Good, then I'll give it to you."
Lu Zhou returned the small box to the drone. He then motioned the drone to fly in front of Academician Liu and place the small box on his table.
Academician Liu picked up the small box and opened it. He was surprised to find that there was actually a 10-key digital keyboard and a simple display.
It was like a small calculator, but there were no addition, subtraction, multiplication, and division symbols. There was an additional confirmation button. Lu Zhou didn't know what this thing was used for.
Lu Zhou continued to speak.
"… We all know that traditional computers only need 0.3 seconds or less to generate a 1024-digit prime number. Two prime numbers would be 0.6 seconds. Multiplying two prime numbers can be negligible."
"But if we turn it around and split the product of two large prime numbers, the same computer might not be able to do it even after three days and three nights."
The moment he finished speaking, there was a commotion in the classroom.
Many people's faces were filled with astonishment and even shock.
Lu Zhou looked at Academician Liu, who seemed to have guessed something. He smiled and made an inviting gesture.
"Now you can use your own computer to randomly generate two prime numbers of any size … preferably more than 1024 digits, and then find their product.
"I believe this is easy for you.
"Finally, I hope you can input the product into this box. Soon, we will witness a miracle."
Academician Liu's throat moved, and his trembling voice was full of excitement.
"You mean …"
Lu Zhou looked at Academician Liu, who began to look surprised. He didn't say anything. He just smiled and nodded.
"You'll know when you try it."
Academician Liu followed Lu Zhou's instructions and quickly generated two large prime numbers with more than 1024 digits on his computer. He then patiently entered their product into this pocket calculator.
Other experts from the Chinese Academy of Sciences, as well as Director Li, stood behind him and watched him continue the experiment.
After all, it was more than two thousand digits, so the input work took a long time.
When Academician Liu finally finished all of this and pressed the confirm button, a miracle happened!
There wasn't the slightest delay.
It was like a simple addition and subtraction. The product of this large prime number was quickly disassembled and divided into two prime factors.
When Academician Liu saw the number appearing on the screen, almost everyone around him was surprised.
Instantly!
This problem, which would take a few days to solve for a traditional computer, was solved in less than a second!
Academician Liu's eyes widened. His mouth opened and closed, and he was completely speechless.
Before coming here, he originally thought that the solution to the qubit entanglement collapse problem that Lu Zhou said was only a theoretical solution.
Unexpectedly, while he was still confused about the theory, not only did Academician Lu come up with the theory, but Academician Lu even made a specific sample.
The experts from the Chinese Academy of Sciences weren't the only ones who were shocked. Director Li, who was standing next to them, was also shocked.
What kind of changes this technology would bring to the world? He was so shocked that he didn't have time to think about it.
The only thing he was clear about was one thing.
The RSA encryption rules, which had been used for nearly half a century, could be completely retired from the stage of history from today onwards …
Lamp pen
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