I am devoted to scientific research, but you want to trick me into having a love relationship?

Chapter 526 Towards the Top Superconducting Film

Outside the window, the snow is still falling. Compared with northern cities like Kyoto or Boston, which is close to the ocean, the snow in Chengdu looks delicate, like flying catkins, falling to the ground and quickly disappearing.

"Bang~"

It's already 12:40 in the morning, and I can still hear the sound of fireworks coming from outside the window.

Xu Qingzhou held his breath and concentrated, focusing all his attention on the manuscript in front of him.

It was he who previously calculated the companion particle, and speculated that the mass of the companion particle was between 200GeV and 500GeV, located in the more complex Higgs sector.

It is not difficult to improve the model now, and it can even be done with ease.

Fortunately, before sending the data over, Richard had already used the supercomputer at CERN to process the high-energy collision data and screened out events that might contain Higgs partner particle signals, saving him a lot of trouble.

During the nearly one year of experiments, LHC mathematicians have made corresponding adjustments to the model, but in Xu Qingzhou's opinion, it is hard to put it into words.

Basically, there are no major changes. There are some good things, but most of the steps are just scratching the surface. For example, here, Bayesian statistics are used to extract weak signals in the collision data. This method is very inefficient. It is better to use persistent coherence to analyze the topological structure of the collision event and distinguish the decay characteristics of the companion particle from the background noise.

Xu Qingzhou did not question the ability of these scholars. After all, not everyone was a cheat like him, bringing back physics from his previous life. Besides, he was the one who created this thing and knew it like the back of his hand. Of course, he could see the problem at a glance.

As he was writing, the screen of the mobile phone on the table suddenly lit up.

It’s news from Song Yao.

Song Yao: "Professor Xu, we are home."

"Whoo~"

Xu Qingzhou rubbed his sore temples, put his manuscripts in order, and planned to have a phone call with School Beauty Song to make some soup before going to bed.

The New Year time passed quite quickly.

The Xu family went to the Song family on the second day of the Chinese New Year, and went to the countryside to visit the elderly on the third day. After returning to Chengdu, in addition to accompanying their parents, they also needed to look at the data on the superconducting film sent by Carson.

Therefore, Xu Qingzhou used his spare time to consider the calculation of companion particles.

He first considered quantum field theory and renormalization, and made corrections to the top quark loop diagram.

It went relatively smoothly because he was the one who made the original model and he knew best what needed to be adjusted.

But some places will require us to wait until we return to Boston to make detailed calculations.

This includes non-perturbative effects, such as the vacuum stability of the Higgs potential, which requires numerical solution of the path integral on a discrete space-time grid through lattice field theory. The four-dimensional network calculations and Monte Carlo sampling involved hundreds of thousands of times require the parallel capabilities of a supercomputer.

The sixth day, Song family.

In front of the full-length mirror, Song Yao slapped away Ding Jiahui's claws that were on her butt, "What are you touching?"

"Yaoyao, you have changed."

Ding Jiahui looked at Song Yao pitifully and said aggrievedly: "Xu Qingzhou can touch her, but I can't."

"Neither can he."

Song Yao curled her lips and adjusted her collar in front of the full-length mirror, thinking that the guy would be beaten up when he attacked her, a young comrade.

Ding Jiahui sighed, rested one hand on the cabinet, and looked at her incredibly beautiful sisters with her chin resting on her hand.

The hair is a little fluffy and tied with a small rubber band.

As a veteran Japanese anime fan, there is only one thing in my mind: Madam, your hairstyle is very dangerous.

"Yaoyao, you look even more like a married woman than last time."

"I'm already married." Song Yao said indifferently.

Ding Jiahui couldn't refute it. She looked at Song Yao from the side. She couldn't help but feel envious. Yaoyao's breasts looked much "bigger" than before. Then she looked at her own
The child might even starve in the future. She sighed, "Xu Qingzhou is lucky to have found you as his wife."

"Have you and Guo Ziyang considered getting married?"

"It's still early for us. We just met each other's parents this year and they are both very satisfied. But we think that we should wait for another one or two years and consider marriage after our work is stable."

Song Yao nodded, combed her hair simply, put on thick clothes and prepared to go out with Ding Jiahui.

Ding Jiahui came up to her and said, "Let me touch you again, haha. Okay, okay, I won't make a fuss anymore. Let's go. Our appointment is at 2pm, so now is a good time to go."

Wutong Community.

“Well, I’ve looked at the data. Perhaps you can adjust the topological carrier concentration and optimize the coupling strength through ALD in-situ doping.”

Xu Qingzhou said as he put on his clothes.

Carson and Mars are advancing the progress of superconducting films, but they have found that the interaction between topological surface states and Cooper pairs of superconductors is relatively weak. The electron wave function of the topological surface state cannot resonate with the wave function of the superconducting Cooper pairs, resulting in the Majorana zero-energy mode being unable to "move" stably.

To put it in a more vivid way, one can imagine that they are now making a precision mechanical watch, the movement of which is driven by two meshing gears, namely the topological surface state and the superconductor Cooper pairs.

Now the question is.

The two gears do not match, and the sharp teeth of gear A slide across the soft metal surface of gear B, making it impossible to engage and transmit power.

On the phone, Carson replied: "I've made a note of it. I'll look for the right carrier concentration tomorrow."

"Okay, call me if anything happens."

Xu Qingzhou hung up the phone.

In the past few days, Casson repeated the experiment according to the previous parameters. Under the condition of Jc (12 T, 4.2 K), the performance of the superconducting film can still reach 2.0×10 A/cm.

This is good news.

Of course, there are also many problems. Although they can make commercial-grade superconducting films, the success rate is extremely low. Among 10 superconducting films, only 2 have Jc values ​​that meet the standards.

In addition to the Jc value, T_c fluctuates within ±0.65 K, while the commercial-grade target is within ±0.3 K.

As for surface roughness (RMS), the current fluctuation range is 1.2–2.0 nm, which is much higher than the commercial standard of less than 1.0 nm.

In Xu Qingzhou's opinion, these are not big problems. The core Jc has already reached the standard. Solving and optimizing other issues such as critical temperature (T_c), grain size, etc. is just a matter of time and can be done through slow iterations.

Moreover, 2.0×10 A/cm was not his goal.

You should know that in recent years, the standards of Princeton, Cambridge, and MIT laboratories have been greater than 3.0×10 A/cm. Only when this data is reached can it be truly considered to have entered the ranks of world-class levels.

After he finished his call with Carson, he said hello to Ms. Wang who was watching TV in the living room and went out.

Wang Xiaping shook her head helplessly. She used to think that what her son said was like a spell, and now it sounded even more like it when he used English.

MIT Laboratory, Boston.

"Hey, Mars, let's get started." Carson clapped his hands, full of energy.

Suddenly, I felt the joy of a liberated serf singing.

He could imagine that once the results were announced, the "least reliable project" voted for at the MIT Investment Club's year-end simulated investment meeting would surely leave countless people dumbfounded.

As it turned out, he made the right bet again this time.

God is on their side.

If nothing unexpected happens, the Superconducting Thin Film Club will definitely have a seat in their research group.

(End of this chapter)