After Coyle and McIson came to find Chen Zhou, no one came to disturb Chen Zhou.

The only thing that may have surprised Chen Zhou a little was that Professor Friedman had come after the two Coyle had visited.

I still didn't look for him.

This was very unexpected by Chen Zhou.

In Chen Zhou's speculation, the purpose of these two people coming here is very clear.

After leaving, he would more or less mention to Professor Friedman that they had come to him.

And then add Professor Cross's complaint in the middle, and it's a little puzzling that Professor Friedman doesn't find himself.

However, if you can't figure it out, you won't think about it anymore.

Chen Zhou, who has devoted himself to mathematics and physics, has once again raised his rhythm.

December 25th.

Christmas for the people of the United States.

LIGO has also started a holiday mode.

Yang Yiyi also returned to MIT by herself.

In fact, LIGO started the holiday three days ago.

It's just that for the unprocessed project materials at hand, Yang Yiyi stayed until the last day.

At this time, MIT was already in the joy of the New Year.

The joy is in the atmosphere, but not in the numbers.

Because there are not many teachers and students at MIT who stay on campus.

Most of them are mainly Chinese students.

And Christmas is actually meaningless to Chinese people at all.

In the dormitory, Chen Zhou put down his pen after writing the last line of mathematical formulas.

After looking at the time, it was time for dinner.

tilted his head slightly and looked at Yang Yiyi, who was sitting at another desk.

Yang Yiyi was still immersed in her own subject world at this time.

From following Professor Weiss to going to LIGO, there has been a certain deviation in the direction of physics research between Chen Zhou and Yang Yiyi.

The two men were also moving towards their own paths.

Slowly getting up, Chen Zhou walked behind Yang Yiyi and leaned over to take a look.

After seeing the contents of Yang Yiyi's notebook, Chen Zhou couldn't help but show a smile.

No matter what other people's research methods are, at least Yang Yiyi was deeply influenced by Chen Zhou.

Both of them used a large amount of literature to sort out the research context of the topic, and then find the directional method.

It's just that compared to Chen Zhou, who has an excellent mathematical foundation and the artifact of the problem set.

Yang Yiyi needs to spend much more time and energy in this regard.

But compared with ordinary people, Yang Yiyi, who was deeply influenced by Chen Zhou, is more than a little bit stronger.

Although that kind of directional judgment comes largely from Yang Yiyi's own experience accumulation.

But it also reflects Yang Yiyi's essence of being a scholar.

She seems to have the keen instincts of a natural physicist.

And this has also been praised by Professor Weiss, a candidate for the Nobel Prize.

Therefore, when I saw that Yang Yiyi was also using this method and had gradually figured out her own path.

Chen Zhou's heart was still a little excited.

As if sensing the presence of the boy behind him, Yang Yiyi glanced back suspiciously.

And this time he turned around, just opposite Chen Zhou's eyes.

Chong Chen Zhou smiled slightly, and Yang Yiyi asked softly, "What's wrong?"

"It's nothing......" Chen Zhou said, stretched out his hand to wrap his hand around Yang Yiyi, rested his head on the other party's head, and said softly, "It's just that I miss the days when you were by your side, and now I am the only one every day, and I will miss ......you very much."

Yang Yiyi put down the pen in her hand and said gently: "When you are not around, I miss you too......"

Immediately, Yang Yiyi smiled: "But when I am busy in the laboratory, I can only take time to think about you." ”

Hearing this, Chen Zhou deliberately pouted and said, "Then can't I only be ranked second?

Yang Yiyi tilted her head, thought for a while and said, "That's not it, you are...... ...... tied for first place"

Chen Zhou smiled softly and slowly let go of his wrapped arm.

Yang Yiyi immediately stood up, looked at Chen Zhou and asked, "Then when I was away, were you obedient?

Chen Zhou hurriedly shook his head: "What can she do? I am in a near-retreat mode every day, and it is difficult for her to find me if she wants to." ”

Yang Yiyi: "Really?"

Chen Zhou: "Of course it's true!"

Yang Yiyi deliberately showed an expression of disbelief: "Huh?"

Chen Zhou looked at the girl in front of him, didn't explain more, and kissed her directly.

This kiss, Chen Zhou is very affectionate.

This kiss, all the thoughts, are exhausted.

For a long time, lips and teeth parted.

Yang Yiyi, who finally took a breath, heard Chen Zhou's vicious voice: "Now believe it, right?"

"Hmph!" Yang Yiyi snorted softly.

Since it was Christmas, Chen Zhou and Yang Yiyi also decided to give themselves a short night off.

It's not for the events held in the apartment building, it's just for the warmth after a long absence.

After coming to MIT for so long, although the two of them have explored the school quite clearly.

But the world outside the school is not so familiar to the two.

And Boston, a shopping paradise, is naturally also a paradise for couples to date.

Of course, when dating Yang Yiyi, the indispensable thing is food.

And secondly, it's anything else that's fun.

The two of them, who had been crazy all night, enjoyed the joy of getting together.

And other acquaintances did not bother the two.

Early the next morning, the two got up early for a morning jog as usual.

Because of the holiday, the senior sister Nott that Yang Yiyi was talking about in her mouth and heart did not appear.

Chen Zhou naturally paid attention to this, but just chuckled and shook his head.

Sure enough, girls are jealous.

It doesn't matter if the person is threatening or not.

At the end of the morning run, the two quickly settled their breakfast in the cafeteria.

Although most of the students have started their holiday life, the school still has two cafeteria windows.

On the way back to the dormitory from the cafeteria, Chen Zhou said softly: "There is probably more than half a month, and we are about to return to China." ”

Yang Yiyi nodded lightly: "Well, when the work in your hand is over, we will go back." ”

"Hmm. Chen Zhou replied and did not speak again.

Yang Yiyi's work here cannot be solved in a while, and there is no rush to produce results in time.

Therefore, she was waiting for Chen Zhou's time.

And Chen Zhou has finally entered the final battle.

This battle exists in two points.

One is a linear representation of the Artin L-function of the Galois group, which is still a little bit of a critical inspiration.

If this inspiration appears, then Chen Zhou will quickly solve this problem.

and represents his voice in the field of algebraic geometry.

But if this inspiration does not appear, then Chen Zhou can only be stuck all the time.

As for the Goldbach conjecture applied for in the national "Ten Thousand Talents Program", there has been little progress.

Chen Zhou's hope that the distribution deconstruction method would be perfected through algebraic geometry and eventually applied to Goldbach's conjecture also came to a standstill.

The hope of a possible breakthrough is also the only inspiration needed for the linear representation of the Artin L-function of the Galois group.

As for whether it will eventually lead to a breakthrough from point to line and then to surface.

Chen Zhou wasn't very sure.

After all, the solution of Goldbach's conjecture requires innovative mathematical tools and mathematical thinking.

Before the final result, any innovation is just innovation.

Even if there is a guide to the problem set.

Because problem sets don't give the kind of innovation you need.

Another point of the battle is the detection method of the rubber ball experiment.

The correction of specific experimental parameters and the derivation of experimental data can be corrected by Chen Zhou by relying on the processing of data, the analysis of experimental literature, and the direction guidance of the wrong question set.

However, in terms of detection methods, directionality is not enough.

Just like the innovation required by Goldbach's conjecture.

Therefore, even if the completed research results are excellent papers that can be listed in Nature or Science.

For Chen Zhou, the practical significance is still not big enough.

He wanted to find the ball of glue that only existed in theory.

Looking at Chen Zhou, who was in thought, Yang Yiyi asked out loud: "Are you thinking about the topic?"

Chen Zhou nodded: "Well, there are difficulties that cannot be broken through. ”

Yang Yiyi thought for a while and said, "Tell me about it?"

"One is a mathematical problem in the field of algebraic geometry, which requires solving the problem of linear representation of the Artin L-function of the Galois group. ”

"I've now completed the connection between the Galois group and the Atin L-function, but I'm always missing something when it comes to the final result......"

While Chen Zhou and the two were talking, they had already returned to the dormitory.

When he came to the desk, Chen Zhou picked up the scratch paper full of mathematical symbols and formulas, pointed to the content on it and told Yang Yiyi about his research without reservation.

For the difficult problems in the field of algebraic geometry, Yang Yiyi actually can't give any substantive suggestions.

While a good physicist must be a good mathematician.

But the current Yang Yiyi really can't reach that level.

But after listening to Chen Zhou's words, Yang Yiyi still said: "Although I don't know how to solve this problem, if it were me......"

Yang Yiyi pondered for a moment before he said: "I should start with the linear representation of the Atin L function, and then seek the connection of the Galois group, which can be regarded as a causal cause......

What Yang Yiyi said was just an idea, although she also knew that she couldn't give Chen Zhou any more constructive advice.

But there is a difference between saying and not saying.

But after listening to Yang Yiyi's words, Chen Zhou was stunned for a moment.

Chen Zhou, who has been accustomed to seeking effect from cause for a long time, has really never tried the method of seeking cause and effect in Yang Yiyi's mouth.

Moreover, Yang Yiyi's words also provided Chen Zhou with more associations.

Since the linear representation is the effect, it is not just a linear representation of the Atin L function that can be verified first.

There is also the relationship between the Galois group and the linear representation, or the principle of derivation......

Looking at Chen Zhou, who was thinking again, Yang Yiyi didn't interrupt him again this time.

It's just that she is a little strange, can her simple ideas bring inspiration to Chen Zhou?

Inspiration for this thing, Chen Zhou doesn't know if there is one.

But often a word from an outsider will bring unexpected results to insiders.

Chen Zhou now feels that he is like this.

Yang Yiyi's unintentional words may be able to bring him different results.

For a long time, when Yang Yiyi was already sitting at the desk, Chen Zhou moved slowly.

He wasn't in a hurry to write on scratch paper.

Instead, he glanced at the scratch papers in his hand and slowly put them back on his desk.

Then, I picked up the scratch paper about the rubber ball experiment class.

Walking to Yang Yiyi's desk, Chen Zhou handed her the scratch paper and said softly: "Yiyi, you take a look first, if there are any suggestions." ”

Yang Yiyi reached out and took the scratch paper and looked at it seriously.

Although she didn't know what Chen Zhou was thinking just now, she would definitely not refuse in the face of Chen Zhou's words.

Chen Zhou's idea is actually very simple.

The problem in the field of algebraic geometry is not too troublesome to verify.

Even if he thinks about it, there are far more than Yang Yiyi's suggestions.

That's just two or three days.

Compared with this difficult problem in the field of algebraic geometry, Chen Zhou feels that the difficulty of the rubber ball experiment and the suggestions that Yang Yiyi may put forward are really more constructive.

After all, how does LIGO observe gravitational waves?

What is Professor Wess's greatest contribution?

It's the detection method of gravitational waves!

The stones of the mountains can be used to attack jade.

In a sense, there is a great deal of connection between the various disciplines in physics.

Chen Zhou wanted to find a suitable detection method for the rubber ball from the disciples of the "Detection Master".

After Yang Yiyi finished reading it, she also understood Chen Zhou's intentions.

Turning his head to Chen Zhou, he smiled and said, "LIGO is a laser interferometer gravitational wave observatory, which is not at all the same as the way your SLAC observes the rubber ball. ”

Chen Zhou didn't mind and said, "That's okay, I just want to know what you think." ”

"Hmm...... Okay then......" Yang Yiyi said, glancing at the content of the scratch paper in her hand again.

To be honest, she has always been amazed by Chen Zhou's research methods.

The contents in her hands now also made her sigh.

Although she learned the same method from Chen Zhou, she felt like a child in comparison.

And Chen Zhou is a giant.

After a while, Yang Yiyi said: "I won't talk about the principle or anything, let me tell you about some characteristics of the LIGO detector." ”

"Good. Chen Zhou nodded.

The principle or something, there really doesn't need to be introduced too much by Yang Yiyi.

Chen Zhou had known about it before.

After all, the research content of his girlfriend still needs to be paid attention to.

"LIGO has three detectors at two sites, two detectors with arms of 4 km and 2 km in Hanford, Washington, and one detector with two arms of 4 km in Livingston, Louisiana......"

"LIGO's anti-vibration system suppresses all kinds of vibration noise, the vacuum system is one of the largest and purest in the world, and the optics are unprecedentedly accurate, measuring displacements 1,000 times smaller than the size of a proton!"

"The computing facilities are highly capable enough to handle huge amounts of experimental data, and the optimal sensitivity has reached the order of 10. In the S6 scientific exploration, its laser power has been increased from 10 watts to more than 30 watts, and the detection range can be expanded by 8 times!"

"Since then, the 'Advanced LIGO' upgrade program has been carried out, the laser power has been increased from 10 watts in the initial version of the LIGO to about 200 watts, and the lower detection frequency limit has been extended from 40Hz to 10Hz, which is 10 times more sensitive than the original version of the LIGO!"

"This means that LIGO is able to detect gravitational waves at a distance 10 times higher than before, and the detection range is also more than 1,000 times larger, and it can detect 1,000 times more possible sources of gravitational wave waves than before!"

"As for specific detections, the frequency bands chosen by LIGO are often in the ......"

Although Yang Yiyi's voice was flat, as she spoke, Chen Zhou's mind began to calculate the specific meaning of these data.

The so-called referential nature is also in these specific senses.

In fact, the most direct manifestation of the detection method often depends on the sensitivity of the detection instrument.

The detector that can meet the sensitivity requirements of the instrument is the most suitable detector.

In addition, the Virgo interferometer, also known as the VIRGO, a ground-based laser interferometer with a length of 3 kilometers with two arms, was involved in the final part of the S5 detection, and the VIRGO also has a sensitivity comparable to that of the LIGO. ”

"This interferometer is now in the process of upgrading the 'Advanced VIRGO', and the news from Professor Weiss is that after the upgrade is completed, it will officially join LIGO and operate alongside the two current detectors. ”

"By then, the three detectors should be able to give a more accurate location of the source of the gravitational wave......"

Although speaking of the back, Yang Yiyi said some digressions, which can be regarded as some of her expectations.

But this gave Chen Zhou a new inspiration.

That is, the increase in sensitivity, through the increase of detection instruments, can be concretely achieved?

While Chen Zhou was thinking, Yang Yiyi said again: "The rubber ball detection method you want to find now is definitely different from the gravitational wave detection method. ”

After finishing speaking, Yang Yiyi paused for two seconds and continued: "But the rubber ball detector, or high-energy physics experimental research, needs the composition of particle accelerators, detectors and other equipment. ”

"Accelerators accelerate tiny charged particles to very high energies, close to the speed of light, and then hit fixed targets or collide with each other to study the deep structure of matter. ”

"Detectors are used to detect tiny particles produced by collisions and record all kinds of information, which is essentially very different from gravitational wave detectors. ”

"Still, the large integrated multi-particle spectrometers now used to fix targets and colliders, and the large electronic detector arrays used for non-accelerator cosmic ray experiments, may still be able to find some similarities on gravitational-wave detectors......

Yang Yiyi didn't say it absolutely, but it was not a complete denial.

Compared with the problem in the field of algebraic geometry, she still has some opinions on the topic of rubber ball experiments, which also belong to physics observation experiments.

Hearing Yang Yiyi's words, Chen Zhou nodded and said softly: "I flipped through a documentary, which is about the introduction and comparison of various detection instruments in the current physics community, and the content is also the most basic part......

Speaking of this, Chen Zhou suddenly stopped talking.

Because something suddenly occurred to him.