Chapter 102

Old Shen asked. Looking along his line of sight, he saw Xu Kaiqing ticking the machine with his meal card, and then ticking for the second and third time

Like a card swiping machine without emotion.

"Is Lao Xu going to take undergraduates?"

Xie Dingyuan took back his eyes, "teacher, I still have two topics in hand. I just want to borrow the laboratory this time when I go back to Q University, so I won't be involved in the information competition."

"Good." Shen Wenzhao nodded and expressed his understanding: "although there is only one problem, it also wastes energy."

"HMM." Xie Dingyuan bowed his head and ate, chewing each bite carefully.

With a calm and cold face and focused and indifferent eyes, it seems that what is in front of us is not a dinner plate, but a paper.

Old Shen: "... Just get used to it.

Here, there is silence; At the other end, there was laughter.

"Grandpa, are you a teacher of Q university?"

Xu Kaiqing: "that's right." the doctoral advisor called him a teacher. There's nothing wrong with him.

Gao Zhaoming: "what do you teach?"

Xu Kaiqing: "physics."

"Wow! I like physics so much. I also want to take the Physics Department of Q University! When I get in, I'll come to your class!"

Xu Kaiqing: "..." if he is free to start his undergraduate course.

Huang Hui: "the food here is delicious!"

When fan ye heard the speech, he immediately looked up with bright eyes and rice grains stuck to the corners of his mouth: "yes! Delicious! Grandpa, did you know sister Yue before?"

Xu Kaiqing: "of course!" how can I not know? Must know ah!

After lunch, Huang Hui returned to the hotel first, and Jiang Fuyue was invited to Xu Kaiqing's laboratory.

It's called "visit, it's quite big."

Jiang Fuyue smelled the smell of conspiracy.

Sure enough, as soon as the front foot stepped in, the rear foot was forcibly stuffed with a pile of data.

Xu Kaiqing touched his nose: "... I'm idle anyway. Look at this."

Jiang Fuyue lowered her head and swept: "optical Schrodinger cat state?"

"Mm-hmm." Xu Kaiqing nodded hurriedly.

"This is not the category of quantum mechanics. When did you change to study this?"

"Well... It's not me. It's a research topic of a colleague. It focuses on the filter design and the measurement method of the filter cavity length. I've seen it. It's deduced from a theoretical point of view without any problems, but the measurement results are not stable in the actual operation."

Jiang Fuyue raised her eyebrows: "so what do you do for me?"

"... I think you should see the problem."

Before Jiang Fuyue could speak, a figure rushed in and grabbed the paper in her hand: "who are you? In the important experimental area, no one is allowed to enter. Don't you know?"

The visitor was a gray haired old man with wrinkles all over his face. His eyes were very hale and hearty. When he looked at Jiang Fuyue, they suddenly appeared sharp.

"Ah, Lao Shen, what are you doing?" Xu Kaiqing quickly pulled the man aside.

Shen Wenzhao stared fiercely: "why do you ask me? I want to ask you what you're doing? Just bring someone to the laboratory. You think it's your home? And what do you do with my paper? It's like cat disease!"

Xu Kaiqing pulled at the corner of his mouth: "didn't you give it to me?" unexpectedly, he threw a rake upside down.

"I brought it to you to help see what the problem is, not to circulate it to the exhibition."

People only know that Shen Wenzhao is a big man in the field of biology, but they don't know that he has made great achievements in the field of physics, but he is not as expert as Xu Kaiqing.

That's why I took the research paper to him and wanted old man Xu to help. Who knows the result

Xu Kaiqing said he was wronged: "I'm just helping you find a problem?"

"That's it?" Shen Wenzhao's suspicious eyes wandered between him and Jiang Fuyue.

"Yes! I didn't find it, so I asked someone to help you find it. It's wrong?" Xu Kaiqing resisted the impulse to roll her eyes.

What a good opportunity. He didn't give "worry" a look at his own subject. He was close to him first. What was the result?

As soon as I came in, I got angry and had a loud voice.

Shen Wenzhao: "who did you invite?"

"She!" Xu Kaiqing looked at Jiang Fuyue and took it for granted.

Shen Wenzhao immediately blackened his eyes and was so angry that he couldn't say a word: "you --"

Xu Kaiqing: "what's wrong with me?

"You, incredibly let an undergraduate see my thesis, still want to find my problem?"

"Not..."

"I've seen it with my own eyes. Are you still cunning?" Shen Wenzhao looked at him like a heartless man, full of complaints.

Uh!

Xu Kaiqing said, "I'm not sophistry. I want to correct it. She's not an undergraduate..."

Shen Wenzhao: "

Xu Kaiqing then said, "she's in high school."

“？！”

Shen Wenzhao almost fainted with anger: "she? You can think of it!"

"Don't believe it. She knows everything I know, and she knows everything I don't know."

"Hiss - Lao Xu, this joke is not funny at all! A high school student, does she know what Schrodinger cat state is? Does she know what filter cavity and squeezed state are? How dare you show her my paper?"

Jiang Fuyue: "optical Schrodinger cat state is one of the main research objects of the basic problems of quantum mechanics and an important resource of continuous variable quantum information. In its experimental preparation, filtering the trigger light path is the key link to determine the important parameters such as purity and yield of cat state. [1]"

Shen Wenzhao was stunned. These are basic knowledge. It's not difficult. He doesn't feel strange when undergraduates say it, but he's a little confused when he hears it from a high school student.

Xu Kaiqing had already crossed his hands and held them in front of his chest, a posture of watching a play.

"I just took a look at the paper. I don't know anything else, but there is a problem."

Xu Kaiqing's eyes lit up: "what's the problem?" he didn't find it out.

Shen Wenzhao was obviously still stunned.

Jiang Fuyue: "according to the design requirements, the cavity length l shall be less than 189 μ m. But it must be greater than 119 μ m. The interval is too short to be measured by conventional methods. The cavity length can only be measured by using the Guyi phase shift of high-order transverse mode to meet the design requirements. No accident, it should be 141 μ m. This method does not depend on the characteristics of any medium in the cavity. Only in this way can it be universally representative. [1] "

"Old Shen, do you understand?" Xu Kaiqing hums and smiles.

Shen Wenzhao reacted. He quickly opened the paper in his hand, found the page of cavity length measurement, and looked intently, "141? How did you get it? Let me think..."

Jiang Fuyue cast a warning glance at Xu Kaiqing: no next time!

Xu Kaiqing felt his nose guilty.

She said, "let's go."

"I'll send you!"

"No," he said, turning away.

The next second, his steps stopped suddenly. Xie Dingyuan stood not far away and put on a white experimental robe. I don't know how long he watched and how much he heard.

An expressionless face, deep eyes, meticulous from head to foot.

Out of the dust like a mortal.

Jiang Fuyue's eyes flashed, quickly took back his sight, and then passed him.

Unexpectedly, just out of the laboratory, the man caught up