Xueba's Sea of ​​Stars

Chapter 269 Quantum Mechanics
In the next few days, Wu Bin seemed to become an "inherent attraction" in Pei Jiamin's house.

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

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

"Wu Bin, it's time to eat." Lv Miaomei, who had just brought the soup to the table, called to Wu Bin.

"Auntie, eat 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 a few pieces of meat in the steamer and warm it 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~towel~paper~" Gu Jiaqi continued to speak in a very small voice while pointing to the paper box at the corner of the table.

"Oh..." Pei Jiamin glanced at her helplessly after hearing this, took out two napkins and handed them to her, "Are you going to be so flamboyant?"

"I'm afraid 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 poked Gu Jiaqi's forehead, "Ghost spirit, you know people are crazy, so speak well."

"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 finished speaking and looked at Pei Jiamin, "Sister, can you understand?"

Pei Jiamin naturally didn't want to answer her, but just showed her an awkward 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 Xueba..."

……

【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, checked the caller ID that it was Li Yan, and pressed the call button.

"What's wrong?"

"There is a lecture given by Professor Pan on Sunday afternoon, do you want to listen to it?"

"Professor Pan? Which Pan... um!? Could it be Professor Pan Jianwei!?"

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

After showing an apologetic smile to Pei Jiamin and the others, Wu Bin continued to listen to Li Yan who was obedient.

"Yes, there is a Mozi salon on Sunday, and you can go if you sign up."

"A lecture about what?"

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

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

"What are you in a hurry for? This is a popular science lecture, brother, not a concert. Is it hard to get a ticket? Okay, I've signed up. I'll pick you up on Sunday?"

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

"You're welcome, I'll drop by anyway, 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 checking calculation.

"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, came over and asked.

As for Pan Jianwei, he is also a "controversial" top scientist in China.

Not long 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?Nature is Professor Pan Jianwei's research field, quantum information.

First of all, what is quantum?To put it simply, it is the "minimum unit of discrete change". For example, when you climb the steps, you can only go up one step, and those with longer legs can go up three or four steps, but you can't go up half a step. This is discrete Feeling, and quantum plays the role of steps 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?

Much.

Because the nature of the macroscopic substance is determined by the microscopic structure.

Just like the same piece of glass, some will shatter when dropped, but some can be bulletproof. This is the change produced 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 a discrete change. In black body radiation, this physical quantity is the basis of the energy carried by the radiation.

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

During the period, there was a truth that many people who ate melons misunderstood that Einstein actually won the Nobel Prize in Physics because he proposed the theory of light quantum 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 soon shown that the two theories of these two men were equivalent.

Since then, human beings 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, and superfluidity, almost all the technological achievements of modern society are related to quantum mechanics.

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

The core concept is the transformation of the quantum state.

These concepts are all fraught with mystery to humans.

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

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

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

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

The famous "Schrödinger's cat" experiment refers to this phenomenon.

It means that the cat in the box is in a "superimposed" state of dead and alive, and you have to wait until you open the box to take a look at the cat before deciding its life or death.

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

(End of this chapter)