Chapter 414 That sense of fear is back

The research on the Haidao-2 quantum computer has been nearly halfway completed, and it won’t be long before the next generation of quantum computers comes out.

If nothing else, we will continue to maintain our leading position in the field of superconducting quantum computers.

The research on optical quantum computers is expected to greatly increase the upper limit of quantum computing speed.

With the foundation of the previous success of Loongson G1, Xu You is also full of confidence in this research.

After making these decisions, Xu You once again convened the members of the "Suzhou Sutra" project team and came to Jijing University to hold another meeting.

At the meeting, Xu You clarified the direction of the project, formulated a plan for the next phase, and completed the assignment of tasks.

Wang Xiangwu's quantum physics laboratory will play an important role in the "Suzhou Sutra" project.

In order to facilitate Han Shubin and his team's research at Jijing University, Xu You also specially arranged for Cui Ying to help them reserve a temporary room in the Jijing University Family Home.

If the work is carried out too late, they can live directly on the Jijing University campus.

After arranging all the work, everyone entered into an intense state of research.

If you want to create an optical quantum computer with high performance and high application value, the most important thing is to solve the problem of optical quantum chips.

There is a big difference between the optical quantum chip used in the optical quantum computer and the Loongson G1 used in the Volon mobile phone.

Although Loongson G1 is a programmable optical quantum chip, in order to be able to program it, Xu You had to sacrifice the computing power of the chip during development.

It greatly simplifies the complexity of the optical quantum chip circuit and reduces the scale of the circuit.

The same method will definitely not work if applied directly to optical quantum computers.

In order to solve these problems, Xu You, Han Shubin, Wang Xiangwu and other experts in various industries studied ways to solve the problems.

"Mr. Xu, as the complexity and scale of integrated optical quantum chip circuits increase, the calibration of the phase shifter on the optical quantum chip is a very difficult problem."

Wang Xiangwu gave a key issue in the current research from a professional perspective.

"Yes, this is indeed a very difficult problem. When I was studying the Loongson G1, I also deliberately simplified the circuit of the optical quantum chip in order to avoid this problem."

In the subsequent research, this is destined to be an unavoidable problem.

At this time, the skills of brain simulation are of little use.

Xu You worked hard to obtain all the information he could get, and thought repeatedly in a state of deep learning.

"The key to the problem is to be able to complete the calibration of the phase shifter."

Only in this way can the high fidelity of photons be guaranteed.

In the actual optical quantum chip circuit, the phase shifters adopt multiple cascade modes, and Xu You calibrated multiple phase shifters at the same time.

Before that, Xu You needed to solve the calibration problem of a single phase shifter.

In the state of deep learning, Xu You derived the transmission matrix of the multi-mode interference coupler through a series of derivation.

Xu You found Zhao Weijia and arranged the next work for him.

"Teacher Zhao, we need to build this optical quantum circuit to verify the current on the phase shifter."

After becoming the person in charge of the project, Xu You also began to pay special attention to various titles.

Under such circumstances, it is obviously very inappropriate to call Zhao Weijia "senior brother".

"Okay, Teacher Xu."

Zhao Weijia also did not relax in the experiment at all because of the relationship between the two.

In scientific research work, we must maintain a sense of awe and take every detail seriously.

After many days of hard work by everyone, Xu You's first inference was successfully verified.

"Mr. Xu, by measuring the ratio of the output power of the two ports to the total output power, we obtained the relationship between it and the current applied to the phase shifter, which exactly corresponds to the theoretical formula derived previously. The scanning current I and

After measuring the beam splitting ratio T and performing nonlinear fitting of T and I, the calibration of the phase shifter can be completed."

"Very good, the problem of single phase shifter calibration has been solved. Next, there is the problem of multiple phase shifter calibration."

After learning the result, Xu You, Wang Xiangwu, Han Shubin and others were very excited.

However, Xu You himself knew that the difficulty of the subsequent research would increase exponentially.

Han Shubin, who has experienced optical quantum computer research, is the person who knows the difficulty best.

Over the years, Han Shubin has never made a breakthrough on this issue.

Xu You actually solved the first problem in such a short period of time.

…

"Teacher Xu, the quantum state of the phase shifter has been verified and confirmed to be consistent with the formula we introduced before."

After another stage of research work, the project team successively solved several research problems.

We are one step closer to successfully solving the calibration of multiple phase shifters.

At this time, everyone encountered great challenges in calculating the fractional ratio, implementing unitary transformation, and predicting the phase of each phase shifter.

At this time, Xu You stood up again.

After a long period of training, Xu You has been able to put himself into a flow state anytime and anywhere to complete efficient thinking and analysis.

"Professor Xu...what's going on?"

This was the first time Han Shubin saw Xu You in such a state that was almost sluggish.

"This is a personal habit of Teacher Xu. When he is concentrating on thinking about a problem, Teacher Xu will eliminate all distracting thoughts and devote himself to the problem he is thinking about. Don't worry about him and let him think slowly by himself."

Zhao Weijia was used to Xu You's state and was not surprised at all.

It's just that compared to before, Xu You seems to have "entered the realm of transformation", and his state is even more mysterious and unpredictable than before.

Han Shubin was a little unbelievable about this. Sure enough, the working habits of such a world-class genius are different from ordinary people.

At this time, Xu You seemed to have discovered something and suddenly recovered from the "sluggish" state.

Xu You picked up the pen and wrote something quickly on the paper.

A few minutes later.

Xu You put down the pen and smiled with satisfaction at the conclusion drawn on the paper.

"It's figured out, it's finally figured out!"

Zhao Weijia heard the sound and was the first to come over.

"Sure enough, it's still the same as before, I can't understand it at all."

Zhao Weijia vaguely remembered the fear of being ruled by Xu You before.

Every time Xu You introduced some strange formula, Zhao Weijia was always confused.
Chapter completed!