In the next few days, Wu Bin seemed to have become an "inherent attraction" in Pei Jiamin's home. ”

He always sat on the sofa in the living room all day, except for eating and greeting Pei Zhenhua, who had just returned home, it was a statue in a sense.

Gu Jiaqi once tiptoed to Wu Bin's side to take a look, but was quickly shocked by the dense English and a large number of unknown symbols on the screen.

"Wu Bin, it's time to eat." Lu Miaomei, who had just brought the soup to the table, shouted at Wu Bin.

"Auntie, you eat first, I still have some calculations to do." Wu Bin stopped the pen in his hand and looked at Lu Miaomei with some apologies.

"Okay, then I'll put a few pieces of meat in the steamer and help you warm it."

"Thank you, Auntie." Wu Bin nodded and continued to look at the computer.

……

"Sister Minmin, hand me the napkin." Gu Jiaqi, who had just eaten a piece of oily meat, said to Pei Jiamin, but the voice was so small that Pei Jiamin couldn't hear it clearly.

"What?" Pei Jiamin asked.

"Meal~towel~paper~" Gu Jiaqi continued to say in a very small voice while pointing to the carton at the corner of the table.

"Oh yo......" Pei Jiamin glanced at her helplessly after hearing this, and took out two napkins and handed them to her, "Do you want to be so pompous?" ”

"I'm afraid that it will affect Wu Bin's research and become a sinner in human history." Gu Jiaqi's voice was still quiet.

After hearing this, Lu Miaomei couldn't help but poke Gu Jiaqi's forehead, "Ghost spirit, you know that people are crazy, talk well." ”

"I mean really......" Gu Jiaqi poked the rice in the bowl with chopsticks aggrievedly, "What he saw made me suspect that I hadn't been to school at all." ”

"You'll be able to understand it when you go to college." Pei Zhenhua on the side said with a smile.

"Really?" After Gu Jiaqi finished speaking, she looked at Pei Jiamin, "Sister, can you understand?" ”

Pei Jiamin naturally didn't want to answer her, but just showed her an embarrassed but polite smile.

Gu Jiaqi, who snickered twice, glanced at Wu Bin again, and found that his expression was as focused as ever, as if he was cut off from the world on their side.

'Probably this is a top student......

……

【εr=ε∞+1+j2πfπ/εx-ε∞=ε'（f）+jε″（f）】

At this time, Wu Bin, who was checking the formula, suddenly felt a vibration in his thigh, so he took out his mobile phone, looked at the caller ID and pressed the call button.

"What's wrong?"

"There's a lecture by Professor Pan on Sunday afternoon, do you want to go to it?"

"Professor Pan? Which Pan ...... Well!? Could it be Professor Pan Jianwei!? ”

Wu Bin's suddenly excited voice startled the people at the table next door who were eating, and they all looked at him.

After showing an apologetic smile to Pei Jiamin and them, Wu Bin continued to listen to Li Yan over there.

"Yes, there is a Mozi salon on Sunday, you can go by signing up."

"What is the lecture about?"

"I won't talk too deeply about public welfare science popularization, but I think it should be very interesting."

"Go, go, must go, can you still register now!?"

"What are you anxious about, this is a popular science lecture, brother, it's not a concert, can you still get a ticket? Okay, I've signed up, I'll pick you up on Sunday? ”

"Don't bother, I'll just go by myself."

"What's polite, anyway, drop by, see you on Sunday, bye~"

Hanging up the phone, Wu Bin sighed in his heart that this guy was really strong, and then continued to prepare to do his check.

"Brother Wu Bin, who is Professor Pan Jianwei? It's rare to see you so emotional. At this time, Gu Jiaqi, who couldn't hold back her curiosity, came over and asked.

To talk about Pan Jianwei, this is also a "controversial" top scientist in China.

Soon after he returned to China, Fang Zhouzi pushed him into the public eye with an article "Strict proof that Pan Jianwei is a liar".

And what is he attacking? Naturally, Professor Pan Jianwei's research field is quantum information.

First of all, what is quantum? To put it simply, it is the "smallest unit of discrete change", for example, when you climb a staircase, you can only go up one step, and a longer leg can go up three or four, but you can't go up half a step, this is the feeling of discreteness, and quantum plays the role of a step in the microcosm.

How to accurately describe the physical theory of the microscopic world is quantum mechanics.

What contributions has quantum mechanics made to mankind so far?

Very much.

Because the properties of macroscopic matter are determined by the microscopic structure.

For example, the same piece of glass, some of which shatter when dropped, but some of which can be bulletproof, is the change that occurs when it changes its microstructure.

In 1900, when Planck studied the problem of "black-body radiation", he discovered for the first time that a certain physical quantity must be treated as a discrete variation, after the basis that this physical quantity is the energy carried by radiation in black-body radiation.

Albert Einstein, Bohr, de Broglie and others have put forward many important concepts, and slowly formed a huge range of applications of quantum mechanics.

During this period, there is a truth that many melon-eating people misunderstand that Einstein actually won the Nobel Prize in physics for proposing the quantum theory of light when explaining the photoelectric effect, rather than the well-known theory of relativity.

Later, Heisenberg and Schrödinger further strengthened quantum mechanics, first giving a set of theories that could accurately describe any microscopic phenomenon in the mathematical language of matrices, and another theory in the mathematical language of differential equations, and soon proved that the two theories of the two men were equivalent.

Since then, humans have broken into this mysterious microcosm and created a large number of things that can be called miracles.

Because quantum mechanics has explained a variety of physical phenomena that can be seen in daily life, such as electrical conductivity, thermal conductivity, hardness, superconductivity, and superflow, almost all of the technological achievements of modern society are related to quantum mechanics.

To get a preliminary understanding of what quantum information is being studied by Professor Pan Jianwei, you need to know the framework of quantum mechanics, which includes superposition, measurement, and entanglement.

And the core concept is the transformation of quantum states.

These concepts are all mystical to humans.

First of all, bit is a basic concept in computer science, which refers to a system with only two possible states, that is, 0 and 1.

It's like flipping a coin, the result is either positive or aspect.

This is where the first mysterious concept in quantum mechanics, the "superposition principle", comes into play.

It expresses the idea that if two states are allowed to occur in one system, then their arbitrary linear superposition is also a state that is allowed to appear in that system.

The famous "Schrödinger's cat" experiment is about this phenomenon.

It refers to the fact that the cat in the box is in a state of "superposition" of dead and alive, and it must wait until the box is opened to take a look at the cat before deciding whether it lives or dies.

That's what quantum mechanics tells us, that everything is uncertain unless you make observations.