HBWnovel Chapter 413 Problem Solving
Chapter 413 Problem Solving
After everyone walked into the room, Zhuang Weiran appeared in front of everyone in a hurry.No one spoke, Colonel Wu's heart was beating fast, for fear that Zhuang Weiran would stir someone's nerves.After waiting for a long time, Zhuang Weiran said slowly, "I have made the calculation of quantum entanglement, now I will do the calculation again, if you have any questions, just ask."
"I originally planned to hold it in the academic lecture hall, but unfortunately there is no academic lecture hall, so I can only perform calculations here."
Mayor Xie had such an expression on his face, and the secretary behind him smiled bitterly.Sure enough, following Mayor Xie came to listen to Professor Zhuang's academic reports that made people mad.
too difficult!He is so difficult!
Zhuang Weiran didn't talk too much nonsense, and Colonel Wu breathed a sigh of relief.Mayor Xie's secretary looked at Colonel Wu, stunned for a moment, Colonel Wu subconsciously muttered, "What's wrong?"
The secretary stared at Colonel Wu with a pitiful expression, thinking that this was probably the first time Colonel Wu had listened to Professor Zhuang's academic report, but it didn't matter, he soon knew why he showed that expression.
【…
In actual situations, the quantum system inevitably interacts with the external environment, and there is quantum noise. The interaction between the quantum system and the environment will lead to the quantum decoherence process, which is the main obstacle in the practical application of quantum correlation. The squeezed state It is an ideal model that can minimize the quantum noise at present, and the study of quantum correlation in the squeezed state has more practical significance for promoting the application of quantum correlation in practice.
……
r1, r2 denote the compression coefficient of the compressed vacuum library, θ1 and θ2 denote the compression angle, γ1 and γ2 denote the dissipation coefficient of the compressed vacuum library, σ+α, σ-α denote the pseudospin operator of the α atom, σ+α =|aα〉〈bα|, σ-α=|bα〉〈aα|, where |bα〉 and |aα〉represent the ground state and excited state of the α atom. (For calculation convenience, let γ1=γ2=γ, θ1= θ2=0)
……
Re(z), Im(z) represent the real and imaginary parts of the complex number z, m∈[0, 1/4], n∈[-1/8, 1/8].
Since the product of ρ14ρ23 is a real number, the value of n will not affect the size of Θ. Different values are removed in k∈[0, 1] and m∈[0, 1/4] respectively, and three S( ρX|{Bi})
……①]
Zhuang Weiran wrote on the blackboard stroke by stroke, but no one made a sound, and everyone looked at the calculations on the blackboard seriously.Staring at the calculations on the blackboard, I seem to be thinking about something.
Colonel Wu breathed a sigh of relief at the beginning, then frowned again, and now he is dizzy.Well, he admitted that he was uneducated. He really didn't understand what was written on the blackboard.These calculations... are too complicated, and it is impossible for humans to understand them at all.
He carefully observed everyone's expressions, Mayor Xie seemed to want to sleep.The important members of the research team seemed to have half-comprehension looks on their faces. Only a few people were concentrating on the content on Zhuang Weiran's blackboard.
As for Mayor Xie's secretary, he simply looked at the ceiling instead of the blackboard.
At this time, Colonel Wu finally realized why Mayor Xie's secretary stared at him with that kind of eyes just now, probably because he had experienced such a thing before.
Zhuang Weiran wrote more and more, and he finished writing on several blackboards, and Shi Zhengan next to him helped fix the blackboards.
After Zhuang Weiran finished writing everything, he stopped writing.
"Do you have any questions?"
Colonel Wu murmured in his heart, but he had no doubts, because he didn't understand what was written on the blackboard at all.
But don't say this kind of thing, it's too embarrassing.
"Ahem." One of the old professors coughed softly, "There are still some things that are not clear about the sixth picture, can Professor Zhuang explain it in detail?"
"En." Zhuang Weiran turned around with a pen and began to say again, "As shown in the figure... Figure 6 shows the system quantum The evolution image of discord with time γt. The solid line, dotted line, and dashed line in Figure 6 represent the change of system quantum discord with evolution time γt when r=0.01, r=0.05, and r=0.1 respectively. From Figure 6, At the same time, as the compression coefficient r increases, the quantum discord gradually decreases. From Figure 5 and Figure 6, we can conclude that: with the increase of the initial state coefficient a of the atom and the compression coefficient r in the compression library, the system The quantum discord of will decrease with the increase of evolution time γt.②”
"So, can everyone understand?"
"I have no problem." The old professor did not continue to speak.
Zhuang Weiran looked at everyone again and said, "Then, if anyone has any questions, you can ask them."
"Professor Zhuang, can you elaborate on Figure 7?"
Another professor stood up, looked at Zhuang Weiran and said in a deep thought, "Picture 7 is very clear, now I have some questions about the part of picture [-]."
"In Figure 7, we compared the evolution process of system quantum entanglement and quantum discord with time γt when the initial state coefficient a=0 of the atom and the compression coefficient r=0.1 of the compressed vacuum library. From Figure 7 we can compare, When γt3.2, quantum entanglement (C=0), quantum discord (D≠0), but slowly approaching zero. It can be seen that quantum discord exists longer than quantum entanglement, a kind of quantum correlation. Quantum discord The initial value is smaller than the initial value of quantum entanglement, and there is no quantum discord phenomenon at the initial moment. Comparing Figure 1 and Figure 4, Figure 2 and Figure 5 can also prove this point. ③”
After Zhuang Weiran finished speaking, he looked at the professor, "Can I understand this?"
The professor stared at the blackboard for a long time, then nodded and said, "I have no problem."
"So next, does anyone have any questions?"
Everyone started talking quietly, but no one continued to speak.Zhuang Weiran was not in a hurry, just stood at the top of the meeting room and waited for everyone to respond to him.
"This calculation method... seems to be really applicable to quantum computers..."
"Why didn't I think of this method at the time?"
"As expected of Professor Zhuang, if this is the case, maybe it can be applied to quantum computers, at least I think it is possible."
"Tsk tsk, so the quantum entanglement part is solved, right?"
"It should be... resolved?"
Everyone kept talking, but still no one answered Zhuang Weiran.Maybe it's because everyone agreed that Zhuang Weiran solved this problem, at least in Zhuang Weiran's view, no one spoke.
Originally, Colonel Wu's stomach was growling from the briefing after two o'clock in the afternoon to eight o'clock in the evening.After discussing for nearly an hour, Zhuang Weiran said in a deep voice, "Since there is no problem, then everyone will continue to make quantum computers in this way. Is there any problem?"
"After solving the problem of quantum entanglement, the remaining problems are only the principle of quantum parallelism and the principle of state superposition. Can you do this?"
"Let me talk first." The old professor stood up and looked at Zhuang Weiran and said, "At least there will be no problem with the part I am in charge of."
"I don't have a problem with that part either."
"Trouble everyone, I believe there is still hope for a result within this year."
Colonel Wu gasped at this moment. When Zhuang Weiran answered him, he didn't say that the result would be as simple as it is now, but that it might not be completed within two years.Now use a relaxed tone to say that the results will probably be produced within this year, that is to say-it will take one year to solve the problem of quantum computers.To know this problem, Beacon Country has been doing it since the 90s, and it is only in the last few years that the results have come out.
It took Zhuang Weiran a year to catch up with the quantum computer made by the Lighthouse Country in more than 20 years?With this kind of research speed, it is no wonder that he will become a national treasure-level scientist.This is simply an incredible thing.No, this is simply a monster.More monster than anyone else, is this Zhuang Weiran?It's just too scary.
"Colonel Wu?" Zhuang Weiran looked at Colonel Wu ponderingly. At this time, everyone had already left, only Colonel Wu was still sitting on the chair sluggishly.Probably all the researchers are used to Zhuang Weiran's speed. Only Colonel Wu is the first to cooperate with Zhuang Weiran. Seeing Zhuang Weiran's speed, he was really frightened.
"Ah?" Colonel Wu raised his head to look at Zhuang Weiran, and said without blinking, "Professor Zhuang, what do you want?"
"Cough cough." Zhuang Weiran coughed lightly, "Aren't you hungry?"
"Eh..." Colonel Wu came back to his senses and found that everyone had left, only him and Zhuang Weiran's assistant Shi Zheng'an were left sitting there.
"Oh, I'm leaving now."
Looking at the back of Colonel Wu who almost ran away, Zhuang Weiran felt puzzled, "Assistant Shi."
Zhuang Weiran pondered and said, "Do you think Colonel Wu is seriously ill?"
"No." Assistant Shi said with a smile, "Maybe Colonel Wu thinks Professor Zhuang is a bit unbelievable."
"What's so incredible?" Zhuang Weiran shook his head, "There is still a lot of content to be done, and the principle of quantum parallelism is not simple, but compared with quantum entanglement, it is still a relatively simple problem. As long as you continue to overcome If the principle of superposition of states and quantum parallelism are in place, then the quantum computer will be considered a success.”
"There is still half a year to go, and I don't know if it will be successful."
Shaking his head, Zhuang Weiran was sitting in the conference room, Shi Zhengan was beside him, accompanying him.
Shi Zheng'an didn't speak, Zhuang Weiran remained silent.
The author has something to say: ①②③: Excerpted from CNKI: Quantum entanglement and quantum discord of atoms and fields in a compressed vacuum state