Chapter 302

"Forget it, let me explain."

Li Zhendong turned his head, took the microphone, and solemnly explained to the reporter, "what is the cosmic string? A very thin and heavy unified field, born at the beginning of the universe, is a linear defect in phase transition

Many reporters immediately opened their recording pens and pretended to be very serious.

"There are two kinds of strings, one is the straight string across the universe, the other is the ring string of various sizes. All the strings together make up a network of universes. "

Theoretically, the distribution of cosmic strings in the universe is a bit like the neural network of human beings. From the small galaxy to the Virgo Cluster, the Rania Kea supercluster, and even the whole observable universe, there are such network structures.

There's a picture on the screen of an observable universe that's 96 billion light-years away.

This image is not artistically processed, and any of the dots represent a galaxy. In a way, the distribution of these galaxies is too much like a neural network.

The reason why the universe forms a network system instead of spreading all matter evenly is because of the cosmic string.

"Next, it's how to use cosmic strings to push forward..."

When cosmic strings were just born, they vibrated at a speed close to the speed of light, emitting huge gravitational radiation. But no matter how huge the energy is, it is still consumed in the form of gravitational radiation in more than 10 billion years.

But there are also a few strings whose energy has not been consumed completely. For some special reasons, they are hidden in the space. So there are not many strings that can really be used.

It's hard to directly observe the existence of these strings. After all, it's a one-dimensional thing with only length, no width and no height.

“…… The cosmic string has very large scalability. If a string is on the earth, it can accelerate the earth to 3000km / h in one second! "

Hearing this, a female reporter asked curiously, "Professor Li, your statement seems a little strange Isn't the cosmic string not involved in electromagnetic interaction, so how should it be tied to the earth? "

"Even if it can be tied to the earth and produce such a great force, will the cosmic string not break? Strong interactions can't bear such forces, can they? What is it made of? "

In full view of the public, Li Zhendong became the focus of everyone. He felt a little comfortable, but he pretended to be serious and said, "I'm just using an analogy to let you understand the nature of it."

"As a one-dimensional thing, it does not participate in electromagnetic interaction, and it can't be perceived even around us. Like neutrinos, they can travel through our bodies without obstacles. "

"So, how to use it to push forward? It can't be the pull. The answer is... "

"Gravity!"

"But usually, we don't seem to feel its gravity. What should we do? As I just said, it's a one-dimensional topological defect that we can take advantage of. "

"Professor Li, what are topological defects?"

"In short, the defects caused by topological effect always exist in the homotopy sense. For example, if there is a symmetry group in a system, there will be a vacuum corresponding to the broken symmetry

“…… From one vacuum to another, there is a transition state with very low energy, which is generally called soliton, which is a topological defect. Take a simple example, the magnetic chip of ferromagnetic system, because both ends correspond to good ferromagnetic phase, but the direction of M is different, it is two different vacuum... "

Many reporters are making a lot of noise and complaining loudly.

It's impossible to understand so many technical terms. Even if you understand them, you can't write them in the report.

Li Zhendong felt very desperate. He looked back at Zhang Yuan with a smile on his face and wondered how this guy dealt with reporters.

"Don't be upset In short, a condensed matter method can be used to reactivate the gravity of the dormant cosmic string

"In the end, you can refer to the original graviton shielding experiment on earth. There are some things in common That is, we need to break the gravitational balance. Of course, it's just a little bit of the gravitational pull of the cosmic string, just seconds or minutes

He drew a simple image on the screen: a spaceship is slowly sailing, and there is a cosmic string in front of it. The airship suddenly launched a shell, which interferes with the dormancy state of the cosmic string in front of it, making it start to vibrate slightly and emit huge gravity.

"But this short period of time is enough. Think about it. If there is a huge gravity in front of the spaceship when it is sailing, will the whole spaceship be sucked in?"

"Of course, this period of gravity will quickly disappear, but the kinetic energy of the spacecraft, that is, the speed, does not disappear."

"Then we activate the string further ahead and repeat this process continuously. The speed of the spacecraft will be faster and faster, faster and faster!"This is a kind of New way to advance!

This time, all the reporters understood.

"Gravitational propulsion and interplanetary navigation"

"letter from the golden sun"

"human beings on captan"

it was only half a day. After the broadcast of this series of special reports, it soon caused a big wave in the society. The information about the golden sun and gravitational propulsion naturally became the most popular topic.

Originally a little slack of the human race, and again burst out a greater enthusiasm for work!

Similar discussions can be heard on the streets.

"The golden sun's captan is so far away It's almost in two directions. The cosmic string in the middle is broken, so we should not go there specially. "

"For the first time, we should choose a closer star At least I think so. "

"It doesn't make much sense to meet the people of the golden sun."

Even Kunlun Mountain has to be slightly improved. After all, gravitational propulsion is much more optimized than traditional working fluid propulsion, so it is no longer necessary to use the vast majority of tonnage to load fuel. Therefore, some fuel warehouses in the whole Kunlun mountains can be modified into industrial areas, living areas and agricultural areas.

The mass of fuel used to occupy more than 70% of the whole spacecraft, but now it only needs to occupy 20% of the mass. Even more radical, 10% is enough.

This is the advantage of gravitational propulsion!

Of course, gravitational propulsion also has some limitations. Acceleration or deceleration should be carried out near the cosmic string. In this way, there are fewer stars to go to. Not every star can use the cosmic string near it.

And the conventional way of propulsion is still indispensable. Otherwise, the whole spaceship will not be able to move without breaking away from the cosmic string?

On the other hand, the devices that cause gravitational waves are also under urgent study.

Scientists have discovered a usable cosmic string near glitzer 581, which is absolutely great news!

In other words, everything is ready, only the east wind of "Kunlun Mountain".