I ask you to build tractors, but you build rockets?

"Can that thing of yours fly next year?"

"It's almost the same. The actual engine test will be carried out after March. Anyway, it will definitely be fine before November."

In the canteen of the Aviation Development Commission, Lin Ju and Zhong Cheng started chatting.

Although his abilities are completely sufficient, Zhong Cheng has never been at the Spaceport after all, especially since there have been so many changes in the past two years, and he is still gradually getting familiar with the work here.

The space agency has confirmed that it will begin to inject new forces on a large scale. In addition to him, mainstays such as He Zhuang and Yun Hongjun have also appeared in the capital a lot recently, apparently to better adapt to job changes.

Although the space agency has developed rapidly in the past two or three years, due to the changing situation, various plans have become slightly chaotic. Zhong Cheng spends most of his energy on readjusting these improvised plans.

He also quickly realized that most of the variables came from Xinyuan, or that the young man in front of him wanted to know as much as possible.

For example, the miraculous XN90 project is said to use fission technology together with the A100 to hit the pinnacle of propulsion technology inside and outside the atmosphere. Just the brief introduction of the technology is extremely shocking.

"That you……"

Zhong Cheng wanted to ask again, but the ringing of his cell phone interrupted him. He looked at the number in confusion for a few seconds before answering.

"Hey...I'm...here, okay...ok."

The call lasted for several minutes. After hanging up, Zhong Cheng stared at Lin Ju with a strange look on his face, which made the latter feel uncomfortable.

"What's wrong, Mr. Zhong?"

Lin Ju guessed that it might have something to do with him, but he was not sure what it was.

"You want to build a gravitational wave observatory on the moon?"

Zhong Cheng didn't believe it when he said it, but that's what the Academy of Sciences told him just now.

"ah?"

Lin Ju looked ignorant. He really didn't know about this.

Moon, gravitational waves?

There are no related projects in the base, could it be...

"Director Zhong, who did you listen to?"

"Who else could it be? It was a call from the Academy of Sciences. Your President Ye persuaded Wu Yunfeng and said that you and the Institute of High Energy will build an ultra-high-precision gravitational wave observatory on the moon.

The Academy of Sciences asked me when the construction date here is, and if it is true, it will invest in the expansion of several more scientific facilities. "

"??"

…

Class B base.

"Wonderful, really wonderful."

Lu Qun flipped through Jacky Cheung's quantum entanglement communication paper and couldn't help but applaud.

After reading it, he looked at Wu Yunfeng and Ye Changsi next to him and sighed with shock:

"It's amazing. This ingenious way of making the impossible possible really opened my eyes."

"Haha, Professor Lu, so we really need your help."

Ye Changsi kept smiling. The Professor Lu Qun in front of him was one of the few senior scholars in China who mainly studied gravitational waves.

Gravitational waves were only confirmed at the beginning of last year, and the Nobel Prize organization only awarded the award for this discovery two months ago. Compared with other fields, gravitational wave research is indeed difficult.

One is that it has just been confirmed, and the other is that humans have no ability to create or interfere with gravitational waves. They can only stay at the observation level and wait for a signal to suddenly appear from nowhere in the universe. The real scientific research is of limited significance.

And cosmic observation is an extremely long process full of uncertainties. It is possible that we may not wait for a detectable gravitational wave signal even once in our lifetime. The future can be described as dark as a compliment.

Lu Qun proposed the "Tianqin" project last year. Unlike the Aramco LIGO gravitational wave observatory, the "Tianqin" project is to launch large satellites into high orbits above synchronous orbit to form a laser array at ultra-long distances.

The principle of the laser interference gravitational wave detection device is very simple: when a gravitational wave passes by, space will be distorted, and a high-precision laser reflection array will continuously amplify the degree of deflection of the light to achieve indirect observation.

The larger the scale of the laser array or the longer the distance, the higher the sensitivity and the more capable it is of detecting weak gravitational wave signals.

The distance between the satellites of the Tianqin project can reach more than 60,000 kilometers, which naturally raises the sensitivity to an astonishing level.

If the construction of the reflection path can also be completed at this distance, it can be improved by several orders of magnitude.

But at that time, the Tianqin project encountered great difficulties in the demonstration stage, because the requirements for the laser light source and control system were too high, so high that they were almost abnormal and impossible to achieve.

After all, the earth itself is not a perfect circle, and satellites cannot run in a perfect geostationary orbit. These errors are unimaginably high for the Tianqin project, far exceeding the current capabilities and the capabilities that may be available in the next few years. .

The Tianqin project was stranded. Although Lu Qun found Xinyuan Hope, which is known as the money-splitting boy in the aerospace industry, to obtain investment and received some financial support, there was still almost no progress in a year. With their ability, they simply could not The technology needed to solve Project Lyra.

But now there is finally a turning point—not a technical turning point, at least not entirely.

All this comes from the no-delay communication plan planned by Ye Changsi and Wu Yunfeng, but with the deepening of pre-research, it is actually more accurate to call it ultra-short delay.

First of all, what is quantum communication:

Quantum has the observer effect and is in a superposed chaotic state under normal circumstances.

The essence of quantum is photon, and its characteristic expression is positive direction and angle, which may be 90 degrees or 0 degrees. If it is a superposition of these two states, its deflection angle is 45 degrees, whichever one is uncertain.

Before observing the quantum, people cannot determine which state it is in, which is the uncertainty of the quantum; it can only be fixed when observing, which is called collapse.

Whether Schrödinger's cat is dead or not can only be known by opening the box and looking at it. How the quantum particles rotate can only be known by observing it.

For a pair of entangled quantum particles A and B, when one particle A is observed to exhibit a certain state, the other particle B will exhibit the same state as A, no matter how far away it is in space.

Assuming that two particles A and B are in two different positions, the results observed by the observer are completely consistent.

This is the so-called quantum entanglement without delay, but this principle cannot be used for delay-free communication.

The reason is that observer A does not know the state of particle A after observation. Each observation result is random, and observer B cannot obtain any useful information.

For example, a string of information is 0101001. It is true that several quantum states can be defined as 0 and 1, but when observer A wants to transmit information, he cannot be sure whether he is sending a 0 or a 1, so quantum entanglement is impossible. Achieve delay-free communication.

The so-called quantum communication now actually refers to quantum encrypted communication.