Because special "observations" can change local "history", it is only necessary to increase the amount of causal displacement on the timeline to create the prototype of the time machine.

By creating two quanta in an entangled state, one of them is used as the starting point (starting quantum), and the other quantum is used as a button to replace the "artificial" change of the purpose of the "observation" experiment, and then another pair of entangled quanta are created, one of which is the individual who has just been "changed in history" of the system, and the quantum entangled with it is used as the button of the next system, and so on, and the interfering systems are connected to each other, which can theoretically expand the time span of "changed history".

Since history is fixed, for a quantum that has "changed history", it is actually just a matter of knowing the outcome in advance.

Through the two results of particle or wave exhibited by the end quantum, data information similar to 0 and 1 is generated. Eventually, it reaches a state that transmits information to the past by controlling the initial quantum.

……

The use of quantum entanglement to send information to the "past" is currently being tested by physicist John Kramer at the University of Washington.

His experimental idea is to use an interferometer to transmit a photon signal to a very recent time, and in the specific experiment, an interferometer called Alice is used to send a photon signal to an interferometer called Bob, as long as the theory is correct, the Bob meter will receive the information in a very short time before the Alice meter sends the information, and the cause and effect will be reversed.

……

……

"Well, it's not hard to understand the prototype of this simplest time machine. ”

Gao Jun thinks that he has explained in detail, since quantum can reverse cause and effect in a short period of time. If the effect precedes the cause, then how can these systems not be connected by several pairs of quanta in an entangled state. How about expanding the time span of reversed cause and effect?

Su Yuan hesitated and nodded.

"I kind of understand. In other words, through the continuous combination of interferometers, it is possible to send information to the past. ”

"Yes, that's how it works, it's still very simple to say, but how to expand the time span of a single system, and how many of these systems can be connected in series, is the key to how long ago you can get the information back. ”

"Then you should work hard!"

Su Yuan smiled and reached out and patted him on the shoulder, as if he had handed over the heavy responsibility to you.

Gao Jun's idea is actually not really a generation of time machines that can travel within a single world line. Reluctantly send some information back, it's a half-finished product.

There are also scientists in the quantum field who think of such experimental ideas, but they will inevitably encounter practical troubles when they are implemented. Fortunately, Su Yuan and others obtained Gaia's information, including how to design the interference process to expand the time span of a single system, and how to maintain the entangled state of the quantum, and how to shrink the single system as much as possible so that more interference systems can be connected in series in a limited space.

To put it simply, the alien technology already has the best idea, and they just need to make it.

****************

The First Hospital of Binhe City.

Liu Piaoxue accompanied Tang Yuelin to sit in the waiting area outside the obstetrics and gynecology department-gynecology clinic.

The special atmosphere in the hospital. The strange smell in the air made Liu Piaoxue frown. She looked thoughtfully at the few green bamboos in the patio outside the balcony that stretched to the height of the second floor, and for a moment she was stunned, and then withdrew her gaze. looked at Tang Yuelin, who was pale and had teeth marks on his lips.

"Don't worry, maybe it's not as bad as it seems. ”

"But in the morning, the results of the pregnancy test were two red lines. That means I'm pregnant!"

Liu Piaoxue comforted: "The pregnancy test is not necessarily accurate, and the second red line is not a little shallow." It may be a false positive......" patted her on the shoulder and said softly, "The results of the blood HCG are coming out soon." It will be clear then. ”

Speaking of this, Liu Piaoxue frowned again, "I should have listened to the doctor just now and did a B ultrasound first, and see if I could find the embryo sac, doesn't it directly explain whether I am pregnant, long pain is better than short pain, look at your nervous appearance now." ”

"Piaoxue, don't talk about the wind and cold, I'm not afraid! Tell me, what should I do if I'm really pregnant!"

"Think about it yourself!"

Liu Piaoxue glanced at her, this guy is just too to incur such consequences. She looked at the time, "It's time to pick up the order, I'll help you pick it up?"

"Ah, no, no, I'll go and ...... myself," said Tang Yuelin, twisting her little ass and running in the direction of the machine. Not long after, she came back with the blood HCG test sheet, and her whole person looked depressed.

"How did it turn out?"

She had a bitter face, and her face turned pale and said: "It's miserable, the HCG value has reached 60,000, if you are not pregnant, the value should be lower than 3, I have exceeded it by more than 20,000 times!"

Liu Piaoxue sighed, "Sixty thousand HCG, about eight weeks pregnant......"

With such a high value, it was basically confirmed that she was pregnant, but for the sake of safety, Liu Piaoxue still dragged Tang Yuelin to do a B-ultrasound examination. After Tang Yuelin learned that she was pregnant, she had no opinion at all, and was pulled by Liu Piaoxue like a puppet to do various examinations.

In a café near the First Hospital, Liu Piaoxue looked at Tang Yuelin's medical record book and the fetal pills prescribed to her by the doctor, and didn't know what to say for a while. Tang Yuelin's pregnancy status is not good, perhaps because the body broke too early, and because of the excessive number of behaviors when she was young, the growth of the fetus was affected to a certain extent.

"Yue Lin, what are you going to do with this child, if you want to get rid of it, what are you doing with so many fetal pills? ”

Liu Piaoxue was a little dazzling when she looked at so many fetal pills. She was still a virgin, and a safe birth was too far away for her.

“…… I do not know. ”

"God, do you really have this plan? You're only eighteen years old, you're a freshman in college, and besides, if your parents find out about your pregnancy, they won't break your legs?"

Liu Piaoxue looked at her with shocked eyes.

His expression suddenly became serious. "You tell me the truth, who is the child's father! No matter what you say, you have to find him responsible!"

"The child's father?" Tang Yuelin's eyes flashed with confusion. It gradually became clear, and he said with a wry smile: "He can't help." I can't help ...... in the future."

Tang Yuelin remembers very clearly that since she was dragged to the construction site by Guan Feiming to rape, she has never done it with other men, and now she is eight weeks pregnant, and the time point is just in line with that time, and she will take medicine when she does it with other men before, and it is only that time that she was forced by Guan Feiming to miss the best time to take medicine, so it is possible to slip through the net.

When I thought of the child's father, it was Guan Feiming. Tang Yuelin's mind naturally appeared with Su Yuan's face. The hand holding the medicine bag tightened tightly, and she thought paranoidly: It's all to blame on this woman, if this woman doesn't appear, Guan Feiming won't beat her idea, and she won't end up like that in the future, she and him ...... That wouldn't have happened that night!

Tang Yuelin's chest was full of indignation, and these indignations instantly filled her heart, and then continued to impact, tearing a hole in the soft cavity wall. Through the mouth of catharsis, it continues to overflow.

Even Liu Piaoxue on the side was shocked by the resentment she exuded, but she thought that this resentment was directed at the child's father.

Tang Yuelin was full of hostility towards Su Yuan from the first time she saw her, and this hostility came from the fact that when Guan Feiming was holding her on the bed, he was thinking about conquering other women in his heart!

She was angry and annoyed. It was completely unclear whether this indignation towards Su Yuan was because she messed up her life and caused her to become pregnant, or simply because she fell in love with another woman because of her prey. Out of jealousy.

……

……

Winter nights are a bit cold, and the outside temperature has dropped below freezing. The north wind was blowing. The branches of the trees in the neighborhood are constantly shaking in the faint white light.

Su Yuan looked at the layer of mist that had formed on the window glass and closed the golden curtains. Then he turned off the lights and lay down on the bed and wrapped himself in the quilt.

When the time came to half past ten, everyone had gone back to sleep, and the house was quiet, without a trace of movement.

"Bang!" the door was opened, and then the door was gently shut, and a dark shadow flashed to Su Yuan's bedside.

"Su Yuan......," the figure whispered.

"Ye Hao, why did you come to my room......" Su Yuan opened his eyes and looked at him in surprise.

"Su Yuan, I want to sleep with you in my arms. ”

"No, go back to your room!"

Su Yuan very decisively rejected Ji Ye Hao's unreasonable request. She understands each other's thoughts too well, the relationship between the two of them has been heating up recently, and there are many things to do in hugging, but she doesn't have the courage to promise him that they can sleep together in daily life. If you sleep together, there will definitely be a larger-scale movement.

Seeing that Su Yuan rejected himself without thinking about it, Ji Ye Hao was a little disappointed, and he turned around and walked towards the door. Just when Su Yuan thought that he would return to his room, he didn't want Ji Ye Hao to lock the door from the inside with a bang.

"What are you doing!"

Su Yuan exclaimed in a low voice, she pulled the quilt hard, and kicked hard with both feet, but Ji Ye Hao got into the quilt very arrogantly, and at the same time her limbs tightly fixed Su Yuan, so that she couldn't move.

"Hey, you're going too far!"

"Don't move, let me sleep with you in my arms. ”

"No, if I let Gao Jun and Sister Xia know that you slipped into my room in the middle of the night, I wouldn't be able to wash myself by jumping into the Yellow River. ”

Ji Ye Hao turned a deaf ear, wrapped one hand around her shoulder, and the other hand played with her hair with interest, and then landed on her cheek and stroked it gently.

"Uh, you're such a scoundrel!"

Su Yuan pursed her mouth, and the next second she felt a black shadow attacking, her mouth was immediately sealed, and in the whining sound, a pair of bright eyes blinked quietly in the dark night.

After a kiss, Ji Yehao lay on her with both hands.

"Su Yuan ......"

"Huh?"

"I love you......"

Su Yuan's head exploded, and Ji Yehao said that he loved her......

It was the first time she had heard someone confess to her so bluntly, looking at Ji Ye Hao's eyes, she whimpered, pulled the quilt on the side and buried her head in it.

The night was deep and cold.

In the room, two men and women quietly embraced each other, and time seemed to stand still in this moment. (To be continued......)