As we all know, quantum communication uses the characteristic of quantum entanglement, and its principle is actually very simple. Pen ~ fun ~ pavilion www.biquge.info

In the first step, we need to obtain two quanta, a and b, and the small fragments in the microscopic case are called quanta, such as photons and electrons, which are quanta, so it is very easy to obtain quanta.

In the second step, we find a way to entangle a quantum with b quantum, so that they are in a special entangled state.

In the third step, we leave the A quantum in place and bring the B quantum to a place 3.5 light-years away, because the two quanta are in an entangled state, so if we artificially change the state of the A quantum at this time, then the B quantum 3.5 light-years away will also react accordingly instantaneously.

This effect, which ignores spatial distance, is what Entangled Quantum Einstein called a ghostly "transcendental effect".

The exchange of information between two entangled quanta is faster than the speed of light and instantaneous, and if you use electromagnetic waves to transmit signals, you need to wait at least 3.5 years before they can reach the location of the b quantum, which is really inefficient.

On the basis of the above three steps, we can also add a fourth step, we will take out the third quantum (c quantum), if we let the c quantum and a quantum entanglement at this time, what interesting phenomenon will be produced?

In fact, even if quantum A has been entangled with quantum B, we can still let it become entangled with quantum C a second time, but once quantum A is entangled with quantum C again, then its entanglement with quantum B will be automatically cut off.

But the amazing thing is that at the moment when a quantum and C are entangled twice, the state of C quantum will instantly become B quantum, and at the same time, B quantum, which is 3.5 light years away, will instantly have the state of C quantum.

As a result of this situation, we have instantly moved the c quantum from one place to another 3.5 light-years away!

Transposition, or teleportation, is a scenario that cannot be realized in real life, but it can be easily achieved in the quantum world.

If a pair of A and B quanta are used as signal transmission units, then it only takes a lot of such units to combine them coherently, and then let the A quantum string continuously entangle with the C quantum string that "encodes the information", so that the information carried on the C quantum string can be transmitted to the location of the B quantum string over a super distance.

This is how quantum communication works.

Of course, according to the principle of entanglement, quantum radar is also achievable.

Although the entangled quantum is very fragile and prone to decoherence (exit from the entangled state), it is actually not as fragile as we think, and it is no problem to run rampant in the universe without obstacles.

The so-called quantum radar is that through countless entangled quanta, we continuously launch a quantum from the transmitter, and keep the entangled b quantum in the machine, so as a quantum a travels through the universe at the speed of light, and then violently hits the interference, the state of a quantum changes violently, and it will manifest itself on the b quantum.

We only need to record the time and direction of a quantum from the launch to the collision, we can know how far it has traveled and which direction it is in now, and then through the information fed back by the b quantum, we can construct a three-dimensional complete map through big data.

Isn't it easy?

The advantage of quantum radar is that it is more time-sensitive and diverse than traditional radar, and we do not have to wait for the reflected signal of the detected object like traditional radar, because the state of the other party can be seen directly from the B quantum group!

Not only is it more time-sensitive, but it also carries more information!

It can be seen that knowing how quantum radar works, then how to mislead quantum radar becomes very simple.

Doesn't quantum radar rely on a quantum to hit an object, and then "decoherence" occurs to transmit the information of the impacted object to b quantum? Well, even if there is nothing in this place, if I just let quantum A "decohere", wouldn't I be able to send the wrong signal to quantum b? Thus misleading the judgment of the entire quantum radar?

The Institute of Information and Communication of the Academy of Sciences of the Earth Fleet led by Chief Engineer Liu is actually doing this kind of work!

That spherical signal emitter is essentially a high-frequency device that decoherence the quantum! It simulates a false signal source, decoherence all the quanta flying towards it, and then transmits the error information to the quantum radar.

The principle is as simple as it is, but the key is how to simulate a "real-looking" source, which is what they have to consider.

A few days later.

Earth Fleet, Captain's Office.

Zhou Chen looked at Liu Hongce, who was full of excitement, and asked, "The test was successful?" ”

"Yes Captain, the signal emission source test was a complete success!" As he spoke, Liu Hongce handed over the relevant parameters of this test.

"By exploring the comparison and analysis of the long-range quantum receiving devices on board No. 1, No. 2 and No. 3, we determined that the realism of the signal source simulating a large fleet reached 99.999%, almost to the point of being fake, and although the interference effect was not accurately measured, our research estimated that the effective distance reached more than 1 light year!"

Zhou Chen nodded as he listened, and thought quickly in his mind.

The effective interference distance of 1 light year means that a one-dimensional resort image of a virtual fleet can be created in a sphere with a radius of 1 light year with the signal emission source as the center of the sphere, and if you want to simulate a complete fleet in 3D space, you need to place the signal emission source in at least multiple directions.

The signals emitted by these transmitters are coherent in the overlapping region after a specific operation, which in turn simulates the illusion of a fleet!

And the more signal emission sources are placed, the more realistic the simulated fleet will be.

Since the range of the fleet is an area where the signal emission sources overlap, the activity range of the virtual fleet is directly limited by the number of signal emission sources.

Although compared to the signal emission source of the Odo civilization with a interference range of 50 light years, the signal emission source that Liu Hongce and the others imitated was not successful, but it must be known that one is a third-level civilization, and the Earth Fleet is only a second-level civilization, and Zhou Chen is already very satisfied with the results they have achieved.

I believe that if they are given another twenty years, they can definitely take the realism and scope of the simulation to the next level!

"Well, your research is done beautifully, and I thank you on behalf of the entire fleet!" Zhou Chen stood up, pondered for a moment and said, "In this way, you go back and draw up a list, and I want to reward the personnel who participated in the research of signal emission sources!" ”

"Captain, this is what we should do!" Liu Hongce said excitedly, but in his heart, he was very much looking forward to Zhou Chen's reward.

In the Earth Fleet, the status of scientists is reflected in how many results have been achieved, and the more results are achieved, the higher the authority, and the status will naturally rise.

Zhou Chen knows the necessity of Xu Yi's heavy profits, if you want the horses to run fast, you must let the horses eat well! Therefore, senior scientists enjoy privileges in the fleet, and they have various advantages in medical care, security, resource allocation, etc.

Take the most basic medical treatment as an example, having privilege does not mean that they can cut the queue to see a doctor, that is also a loss of status, the privilege here mainly refers to enjoying the latest achievements in life science.

For example, the Institute of Life Sciences headed by Cai Xiaoxi has recently developed a drug that can extend the life span by 20 to 30 years, and this drug is still in the experimental period.

This is a temptation that cannot be refused by everyone!

This is just the beginning, and when the civilization level of the earth's civilization slowly rises, this advantage will only become more obvious.

(To be continued.) )