Chapter 269 Quantum Mechanics

In the next few days, Wu Bin seemed to become an "inherited attraction" in Pei Jiamin's family.

He always sits on the sofa in the living room for the whole day, except for eating and greeting Pei Zhenhua and the others who have just returned home. In a sense, he is like a statue.

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

"Wu Bin, ready to eat." Lu Miaomei, who had just put the soup on the table, shouted to Wu Bin.

"Auntie, please finish eating first. I still have some calculations to do." Wu Bin stopped the pen in his hand and looked at Lu Miaomei apologetically.

"Okay, then I'll put some pieces of meat in the steamer and heat them up for you."

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

…

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

"What?" Pei Jiamin asked.

"Meal~napkin~paper~" Gu Jiaqi continued to say in a very low voice while pointing to the paper box on the corner of the table.

"Oh..." Pei Jiamin looked at her helplessly after hearing this, pulled out two napkins and handed them to her and said, "Are you going to be so exaggerated?"

"I'm afraid that it will affect Brother Wu Bin's research and become a sinner in the history of mankind." Gu Jiaqi's voice was still low.

After hearing this, Lu Miaomei couldn't help but poke Gu Jiaqi's forehead, "Gui Ling Jing, you know that people are going crazy, so talk nicely."

"I'm serious..." Gu Jiaqi poked the rice in the bowl with her chopsticks aggrievedly, "What he read made me doubt that I had never gone to school at all."

"You'll understand when you go to college." Pei Zhenhua said with a smile.

"Really?" Gu Jiaqi looked at Pei Jiamin after speaking, "Sister, can you understand?"

Pei Jiamin naturally didn't want to answer her, but just showed her an awkward yet 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 around them.

'Maybe this is the top student...'

…

[εr=ε∞+1+j2πfπ/εx-ε∞=ε'(f)+jε″(f)]

Wu Bin, who was checking the formula at this time, suddenly felt a vibration in his thigh, so he took out his cell phone, looked at the caller ID and saw that the person on the call was Li Yan, and pressed the call button.

"What's wrong?"

"There is a lecture by Professor Pan on Sunday afternoon. Do you want to attend it?"

"Professor Pan? Which Pan... hmm!? Is it Professor Pan Jianwei!?"

Wu Bin's sudden excited voice startled the people at the table next door and all looked towards him.

After showing an apologetic smile to Pei Jiamin and the others, Wu Bin continued to listen to Li Yan on the other side.

"Yes, there is a Mozi Salon on Sunday. If you sign up, you can go."

"What's the lecture about?"

"It's about public welfare science. It won't be too in-depth, but I think it should be very interesting."

"Go, go, go, I have to go, can I still register now!?"

"What are you so anxious about? This is a popular science lecture, bro. It's not a concert. It's hard to get a ticket? Okay, you've signed up. I'll pick you up on Sunday?"

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

"You're welcome. Anyway, I'm on my way. See you on Sunday, bye~"

After hanging up the phone, Wu Bin sighed in his heart that this guy is really strong, and then continued to prepare for his calculations.

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

Speaking of Pan Jianwei, he is also a top scientist in China who is "controversial".

Not long after he returned to China, Fang Zhouzi thrust him into the public eye with an article titled "Strict Proof that Pan Jianwei is a Liar."

And what was he criticizing? Naturally, this is Professor Pan Jianwei’s research field, quantum information.

First of all, what is quantum? Simply put, it is the "minimum unit of discrete change". For example, when you climb steps, you can only go up one step. If you have longer legs, you can go up three or four steps, but you cannot go up half a step. This is discrete. Feeling, and quantum plays the role of a step in the microscopic world.

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

What contributions has quantum mechanics made to mankind so far?

Much.

Because the properties of macroscopic substances are determined by microscopic structures.

Just like the same piece of glass, some will break when dropped, but some can be bulletproof. This is the change caused by changing its microstructure.

In 1900, when Planck was studying the problem of "black body radiation", he discovered for the first time that a certain physical quantity must be regarded as discretely changing. In black body radiation, this physical quantity is the energy carried by the radiation.

Einstein, Bohr, de Broglie and others have successively proposed many important concepts, and gradually formed a huge application scope of quantum mechanics.

During this period, there was a truth that many people misunderstood. Einstein actually won the Nobel Prize in Physics for proposing the quantum theory of light when explaining the photoelectric effect, not the well-known theory of relativity.

Later, Heisenberg and Schrödinger further strengthened quantum mechanics. One of them first used the mathematical language of matrices to give a set of theories that can accurately describe any microscopic phenomenon, and the other used the mathematical language of differential equations to give a theory. Another set of theories, and it was quickly proven that the two men's two theories were equivalent.

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

Because quantum mechanics explains a series of physical phenomena that can be seen in daily life, such as electrical conductivity, thermal conductivity, hardness, superconductivity, superfluidity, etc., almost all technological achievements in modern society are related to quantum mechanics.

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

The core concept is the transformation of quantum states.

These concepts are all mysterious to humans.

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

It's like tossing a coin, the result is either heads or tails.

At this time, the first mysterious concept in quantum mechanics, the "superposition principle" appears.

The concept it expresses is that if two states are states that are allowed to occur in a system, then any linear superposition of them is also a state that is allowed to occur in this system.

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

It means that the cat in the box is in a "superposition" state of dead and alive. You have to wait until you open the box and take a look at the cat to decide whether it is alive or dead.

This is what quantum mechanics tells us, unless you make an observation, everything is uncertain.