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Qi Wan also agreed with Ning Chen's proposal and said quickly:

"Okay, okay, if we can really detect an obvious zero-voltage conductance peak, will we be the first in the world to prove the existence of Majorana fermions?"

"Well... I can't say so absolutely. But if our experiment is successful, it can at least indicate that Majorana fermions are very likely to exist."

Ning Chen didn't say too much, but just such experimental results were enough to attract the attention of academic circles around the world.

After confirming the experimental arrangement, Ning Chen and Qi Wan began to prepare for the experiment.

Compared with the previous experiments, the preparation for this experiment was more complicated.

Because the true zero magnetic field does not mean that no external magnetic field is added, but the geomagnetic field needs to be shielded.

Although the magnetic field strength of the geomagnetic field is very weak, Ning Chen believes that in this experiment, the magnetic field strength of the geomagnetic field cannot be directly ignored.

Ning Chen and Qi Wan worked together to make magnetic field shielding devices for superconducting circuits.

Metals such as iron, nickel, cobalt or their alloys can effectively shield magnetic fields because of their high magnetic permeability.

After some testing, Ning Chen and Qi Wan selected the material with the best shielding effect on magnetic fields and processed it into the best magnetic field shielding device.

After making these preparations, the two began this experiment with anticipation.

"Ning Chen, can we really measure different data this time?"

Qi Wan felt a little nervous at this time. This was an emotion that Qi Wan had never seen before in previous experiments.

Ning Chen did not have full confidence in this matter and said calmly:

"Stop thinking so much and concentrate on doing experiments."

Soon, Ning Chen and Qi Wan lowered the temperature of the test environment to about 3.8K, allowing the material to transform into a topological superconducting state.

At this time, they also saw a clear zero-voltage conductance peak on the screen.

"It seems...it's really more obvious than the previous zero-voltage conductivity peak!" Qi Wan said excitedly.

Ning Chen had the same feeling in his heart, but because the entire data image was in a fluctuating state, the two of them were still unable to make an accurate judgment.

"Qi Wan, don't worry, let's continue taking measurements."

The only thing Ning Chen and Qi Wan need to do now is to measure as much experimental data as possible.

Because of the volatility and contingency of measurements, it is difficult to draw convincing conclusions with too little experimental data.

After thinking for a while, Ning Chen continued:

"Qi Wan, let's continue to cool down the environment. The cooling rate should be slower. Every time the temperature drops by 0.1K... no, every time the temperature drops by 0.05K, we will stop and measure a set of data."

Hearing Ning Chen's words, Qi Wan said in surprise:

"Measure a set of data every 0.05K? Can we control the temperature so accurately?"

"Don't worry, I'll control this."

Ning Chen has done hundreds or thousands of superconducting measurement experiments before, and is already very experienced in temperature control.

Although the temperature of 0.05K is difficult to control accurately, Ning Chen still has full confidence in his operation.

Ning Chen carefully adjusted the temperature in the test environment. In less than a minute, he accurately stabilized the ambient temperature from 3.80K to 3.75K.

Qi Wan was stunned by this operation.

When doing experiments, Qi Wan always felt that Ning Chen was like an experienced old professor, but his actual age was only twenty years old.

Qi Wan even wondered if there was some kind of old man hiding in Ning Chen's body, providing various professional guidance to Ning Chen.

In this way, Ning Chen and Qi Wan continued the measurement work of the experiment until the ambient temperature was close to absolute zero before ending this experiment.

During the experimental measurement just now, Ning Chen noticed several sets of special data. To the naked eye, the zero-voltage conductivity peak was still very significant.

After sorting out the experimental instruments, Ning Chen and Qi Wan hurriedly began to organize and analyze the experimental data.

After some comparison, Ning Chen quickly came to some preliminary conclusions.

"Qi Wan, you see, after adding the magnetic field shielding device, the zero-voltage conductance peak we measured at the same temperature has improved to varying degrees compared to before. This basically shows that the shielding of the geomagnetic field can indeed be Make the zero-voltage conductance peak more significant."

Looking at these data, Qi Wan couldn't help but admire Ning Chen.

Qi Wan remembered very clearly that Ning Chen accurately predicted such a conclusion using only paper and pen.

And before that, Ning Chen had symptoms of dizziness, and Qi Wan almost sent Ning Chen to the hospital.

"Hey, Ning Chen, look, the zero-voltage conductivity peak of this set of data is the most significant one!"

At this time, Qi Wan pointed to a set of measurement data on the computer screen when the ambient temperature was 0.35K.

The zero-voltage conductivity peak at this temperature is indeed very obvious. You can clearly see the zero-voltage conductivity peak in the image without any magnification of the image.

In previous experiments, such clear zero-voltage conductivity peak data has never appeared.

With these experimental measurement data, Ning Chen was certain that his previous theory was basically correct.

These results can at least show that the influence of the magnetic field in this experiment is far greater than they previously expected.

After completing these tasks, Qi Wan said happily:

"Huh... we finally made some truly valuable results. We haven't eaten well these days, how about we go out to eat something good tonight?"

After hearing Qi Wan's words, Ning Chen also felt that it was time to improve a little.

These days, in order to keep up with the progress of the experiment, they just eat a bowl of noodles or a rice set meal every meal, and they only eat to have the strength to do the experiment.

Ning Chen was about to agree to Qi Wan's proposal, but Ning Chen suddenly remembered something.

Ning Chen had promised Song Xiyun before that he would treat Song Xiyun to dinner when he was done with this period of work. After all, Ning Chen had even postponed his daily night running activities in order to conduct experiments these days.

Thinking of this, Ning Chen said:

"I may not have time tonight. I promised to treat others to dinner."

After hearing Ning Chen's words, Qi Wan was surprised and said:

"Why, do you have any other friends in Yanda?"

Ning Chen was dumbfounded by Qi Wan's words, and said helplessly:

"It's not my first time coming to Yanda, so why can't I have other friends? When I participated in the Qiuchengtong College Student Mathematics Competition, I met many friends from Yanda."

Of course, acquaintance is acquaintance, and the only ones who have a better relationship with Ning Chen are Song Xiyun and Lin You.

Ning Chen is not that active in making friends. Many of his friends are casual acquaintances, and there are only a few friends who can get along particularly well.

Hearing what Ning Chen said, Qi Wan pursed her lips and said:

"Huh, as soon as we got the experimental results, you abandoned your experimental partner and went to eat with others. Forget it, I'll just go and eat something delicious by myself."

"You can also eat with others." Ning Chen said with a smile.

"Others...can't share the joy of a successful experiment with me like you."

Ning Chen felt that Qi Wan's words did make sense. The joy of a successful experiment could only be felt by the members of the experiment.

Of course, this will not change Ning Chen's decision just now.

Ning Chen sent a message to Song Xiyun on QQ, saying that he had just finished a key part of the experiment and asked Song Xiyun if she had time in the evening.

Song Xiyun quickly replied to the message, saying that she happened to be not busy, and the two quickly agreed on a time and place to meet.

Maybe it was because he hadn't run at night with Song Xiyun for several days, but Ning Chen was looking forward to meeting Song Xiyun soon.

"Qi Wan, I'm going out in a while. I may come back later in the evening, or I may not come back at all. You don't have to wait for me."

"Hmph, I won't wait for you."

Seeing Qi Wan's deliberately angry look, Ning Chen didn't mean to coax Qi Wan. After cleaning up the laboratory, he left happily.

A few minutes later, Ning Chen and Song Xiyun met at the agreed place on time.

Today's Song Xiyun gave Ning Chen a new feeling.

Song Xiyun was wearing a light maroon sweater and a brown skirt, with her long hair hanging naturally on her shoulders, looking very elegant and intellectual.

Vaguely, Ning Chen felt that his heartbeat seemed to be faster than usual.