Gu Yijue felt a cold sweat behind her, she thought of the beam of light that Li Ang had just released into the sky, vaguely realized something, and subconsciously turned on the time regression.

With a flash of green light, the crater dissipates and the scene returns to the cramped basement.

The twenty-seven hundred and forty-sixth cycle begins.

Raven, Dumbledore, and Lord Manchu have long been accustomed to this cycle of death and life, and subconsciously gather mana, intending to attack it.

After more than two thousand cycles, these mages have cultivated enough tacit understanding between them, and they don't even need to make eye signals, and the slight mana fluctuations overlapping with each other are enough to transmit information.

"We are becoming more and more familiar with this kind of high-intensity fighting, and I am afraid that it is only one step away from defeating or even killing Leon."

The same message appeared in the hearts of the three of them, and with it, a feeling of joy.

However, the Ancient One mage on the other side of the basement had no heart to hope for victory, her face tensed, still thinking about what Li Ang said, "Within the light cone, everything is fate." ”

"That beam you just released,"

Suddenly, the Ancient One Master raised his head and asked with difficulty, "What is it?" ”

"It's a photon."

"More precisely, it is to separate a pair of entangled photons carrying information and release one of them onto the moon's quantum communication satellite," Leon explained with a smile.

This process is repeated a certain number of times at a high frequency, forming a series of photon strings. ”

Everyone looked at each other, and they really didn't understand these contents.

Fortunately, Raven, who ostensibly identifies as Prime Minister Rachel Ross, suddenly realizes that among the cabinet ministers of the British Empire held hostage by the Bloods is a science and engineering minister for energy and climate change.

She casually released a spell, and the Minister of Energy and Climate, who had been robbed of consciousness by the "Heart Snatching Spell", immediately stood up and said mechanically as he read from his script: "The technology mentioned by Your Excellency Li Ang should be derived from the quantum teleportation scheme, which is commonly known as quantum communication encryption technology.

In general, a piece of information is divided into two parts: classical and quantum information, and is transmitted to the receiver through the classical channel and the quantum channel respectively.

Classical information is naturally the traditional ordinary information, which uses traditional laser communication and is specifically responsible for transmitting the information ontology.

The quantum channel, on the other hand, is more high-end and is not responsible for transmitting the ontological content of the information, but the measurement information of the quantum state, that is, the password used to parse the information.

To use quantum cryptography, an unknown quantum state of a particle needs to be transported to another place, and another particle is prepared to that quantum state, while the original particle remains far away.

According to Lord Leon, it was he who sent a series of individual photons, and the receiver on the moon measured the morphology of these photons, and each side finally got a random sequence.

Because a pair of photons has the property of quantum entanglement, they get exactly the same sequence of random numbers, or quantum keys.

The unique randomness of the quantum key makes it unrelated to the ciphertext itself, and according to the theory of Claude Shannon, the founder of information theory, the ciphertext encrypted with a random number cipher is mathematically impossible to crack.

It is impossible for an eavesdropper to steal the information carried by the photon string, because the Excellency Li Ang is putting a single photon string, and a single photon is the smallest unit of light, which can no longer be divided.

Coupled with the collapse nature of quanta, the eavesdropper's observations will change the quantum state, making it impossible for him to obtain the original key and thus interpret the information based on the key.

Taking all the above conditions into account, the single-photon quantum state key transmission technology used by His Excellency Leon is absolutely impossible to decipher, and no matter what means are used, no matter what technology is used, no matter how high the computing power is, it is impossible to decipher the quantum state key randomly generated according to Heisenberg's uncertainty principle. ”

After the explanation of the Minister of Energy and Climate Change, everyone was still confused, and could only look at Li Ang with doubts.

"Hehe, it's the twenty-thousand-seven-hundred-and-forty-sixth cycle, right?"

"At the end of the 2,745th cycle, I released a single photon string towards the moon, and these photon strings established an optical link with the meme company's quantum satellite on the lunar orbital plane, and the communication distance was the average distance between the Earth and the Moon, which is 384,400 kilometers.

At this 384,400 kilometers of communication distance, the transmission efficiency of the quantum key is 20 orders of magnitude higher than that of the equivalent terrestrial fiber channel, that is, the multiplier of trillions.

The quantum decoy light source on the quantum satellite sends 40 million photons per second, and a docking experiment can generate a 300kbit security key with a bit rate of up to 1.1kbps. ”

Every word that Leon said could be understood by everyone present, but when put together, it was extremely jerky.

"Tsk."

Li Ang pursed his lips and said patiently: "In other words, I sent a large string of single photons towards the quantum satellite in the lunar orbit, originally I was worried that you might block or even tamper with the transmission of the photon string, but you didn't know, so I was worried in vain."

Regardless, these strings of photons form a key in the quantum satellite, which ultimately leads to a command. ”

Gu Yi suddenly realized something, and she said with difficulty: "... What directive? ”

"The explosion of productivity from the Octopus Servant is so great that I am able to do some of the things I love, such as building a military fortress deep underneath the moon. ”

Gu Yi almost bit his lip, and said in astonishment: "Yes, fortress? ”

"That's right, a fortress armed with the Magic Net System." Leon said with a smile: "After receiving the quantum key, the Moon Fortress will start to operate, it will release a small amount of high-energy particle beams, and the moment it comes into contact with the London Magic Net, it will be strengthened with aether, increase the energy level, and tear apart the target location devastatingly....."

Suddenly, he paused and said quickly: "The average distance from the Earth to the Moon is 384,400 kilometers, and the speed of light is 299,792,458ms, which means that it takes 1.28 seconds for light to be transmitted from the Moon to the ground. ”

As soon as the voice fell, 1.28 seconds arrived.

Light, infinite light.

The Moon Fortress unleashed a pillar of light that spanned a distance of 384,400 kilometers and hit the basement in the middle of the city of London in the British Isles in the North Sea.

Gu Yi didn't even snort, and was completely torn apart by the high-energy particle beam.

Time regression begins passively, a flash of green light, and the basement returns to its original state.

However, he did not wait for the ancient one to gain a foothold. The time of 1.28 seconds is up again, and the beam comes again.

Leon stood alone in the beam of light, his body washed by the high-energy particle beam, constantly festering and cracking, and quickly repaired by time back.

The strong body of the Jindan monk made Leon survive forever longer than the others, so that even if the ancient mage wanted to die together, he would not be able to do it.

"You've lost."

Li Ang was washed by the high-energy particle beam again and again, watching the green light flicker on the ancient mage, trying to rewind time in vain, and laughed loudly: "It's useless, the speed of the photon string is almost the speed of light, so at the time of the two thousand seven hundred and forty-fifth cycle, the photon string is already beyond the interference range of time rewinding.

In other words, the fact that the photon string is transmitted to the lunar base has become the 2,745th cycle of the past light cone.

If you continue to follow the 2,745th cycle, there is still a chance to live.

However, when you go back in time and do the 2,746th cycle, the fact that the photon string is transmitted to the lunar base has become an impossible future light cone.

Whether you perform the 2,747th cycle, or the 2,748th or 2,749th cycle, you will not be able to rewrite the established time anchor.

Beyond the light cone, everything is unknown, ignorant, and panicked.

Within the cone of light, everything is fate, there is no escape, there is no escape. ”

Li Ang looked at the trapped beast Gu Yi and said flatly: "When you step into the light cone, you have lost the qualification to fight against fate. ”

The Ancient One was speechless, the 1.28-second cycle of high-energy particle beams destroying her, and the Eye of Agamotto repairing her.

In her perception, the lines of the world are constantly constricting, symbolizing that the future of endless possibilities is dying, and everything is heading towards a predetermined destiny.

Number of world lines: 98413579813

Number of world lines: 841613246

Number of world lines: 15,613

Number of world lines: 952

Number of world lines: 2

There are only two last possibilities left, and soon the world lines will be merged into one, and the Eye of Agamotto will no longer be able to reveal other possibilities.

"I lost."

The Ancient One, who was constantly melting in the pillar of light, said the last sentence with difficulty, "Trouble you, defend, this planet...."

A flash of green light,

Number of world lines: 1

In the basement where they returned to their original state, the figure of the ancient one was gone, and everyone was left looking at each other in confusion, not knowing what was happening on their bodies.

"The avenue is fifty, the sky is forty-nine, and people are one of them."

Li Ang stepped forward with grace, picked up the Eye of Agomoto from where the Ancient One was standing just now, and looked at it casually, "The secrets of Minkovsky's time and space are unobstructed in front of my eyes. ”