In June, the undergraduate students of Yan University are taking their final exams in various disciplines.

"In the 23rd century, all human beings have migrated to other planets, and in 3329, you were sent back to Earth as a historian to investigate, and found that the robot society on Earth is still operating, what is the content of the history books written by robots?" ---This is the exam question of the history college.

"If there are zombies, then what is the biological principle of forming zombies?" --- this is the exam question of the Academy of Biological Sciences.

"Due to the rapid expansion of the population, the continuous deterioration of the environment, and the shortage of food supplies, human scientists have used genetic engineering technology to reduce the size of all human beings to the size of ants. "---This is a question in the Department of Social Sciences.

Compared with the test questions of these colleges, Shen Qi's physics questions are relatively conventional.

"The cat box is broken, what is the state of the cat?emmm, who taught this question?"

The students were accustomed to boring and cumbersome physics formulas, and they showed great interest in Schrödinger's quantum cat problem.

The answers are varied, and students use their imagination based on the basic principles of physics.

The grading of the examination papers of the School of Physics is carried out by the teaching assistant, and the first 75 points have standard answers, and the Schrödinger quantum cat question accounts for 25 points, and there is no fixed answer.

Shen Qi explained to the teaching assistant: "Schrödinger quantum cat, as long as the students' explanations are reasonable and can justify themselves, they can get at least 15 points." ”

The marking criteria are very relaxed, and if students can get all the first 75 points, plus the score of the last question of the "open ending", it will also be 90 points.

"Quantum Physics" is a core compulsory course in the School of Physics, and achieving a high score in this course has a certain effect on the improvement of students' GPA.

Teaching assistant Xiao Tao didn't dare to be sloppy in reading the papers, she also read it step by step from undergraduates, and she knew that it was not easy for her younger students to be younger students.

"The box is not opened, and the kitten is both alive and dead, and the state of life and death exists at the same time. When the box is opened, the kitten is alive within a certain probability and dead within a certain probability...... Hey, this poor little kitten is so miserable. Fortunately, this is just an imaginary, a physics test. ”

Because of the restrictions on living in the school dormitory, it is difficult for Xiao Tao to raise cats, but she likes cats very much and often feeds the stray cats on campus.

There is a doubt here, in Schrödinger's big physics hypothesis, why do we have to use cats for experiments? Xiao Tao Wangtian pondered, oh, it's far away, return to the topic, and read the papers.

As a Ph.D. student in physics, Xiao Tao has to admire the whimsy of his undergraduate students.

As for Schrödinger's quantum cat question, some of the undergraduates' answers have gone beyond physics.

"After the cat box shattered, the cat entered another time and space, existing in the form of an 'elf'. ---That's an undergraduate answer.

"According to the principles of quantum mechanics and the theory of general relativity, the cat has returned to a point in time where it has made peace with most humans and is only obsessed with physicists. --- that's another undergraduate's answer.

Xiao Tao laughed and laughed: "I've seen too much on the Internet, right? I'm sorry, I can't give you even a point." ”

Another undergraduate student wrote on the test paper: "Because of the accidental breakage of the box, we did not have the opportunity to observe any quantum state, that is, a certain state that this cat may have." What we can be sure of is that the nucleus is still in all possible superposition states, and the same is true for the cat, which is in a state of being linked to the nucleus of the same quantum state. So, based on this particular setting, this cat is everywhere. I mean, it's possible for the cat to appear in different places at the same time, and we can even find several copies of it. Answered. ”

"This junior's answer is so thoughtful. Xiao Tao couldn't give a score for a long time.

The score of a final test paper, seventy or eighty points and more than ninety points are two grades, Xiao Tao picked out a few controversial test papers and presented them to Shen Qi for decision.

"What's the matter, Xiao Tao, the brain hole of the junior brother and sister makes it difficult for you to give points?" Shen Qi smiled, and then reviewed the few test papers brought by Xiao Tao.

"One session is stronger than the other, and this class of newcomers is the strongest. "Xiao Tao knows that the academy has always been rich in wizards and geeks, and some young people's brains break through the sky.

"Crossing the stream?" Shen Qi reviewed a test paper, and the questions in front of this test paper scored 55 points, and the last question Schrödinger Quantum Cat's answer was seriously off-topic.

"After all, failing the course is a very uncomfortable thing, this classmate Chen Xinjie, has he usually skipped class?" asked Shen Qi.

Xiao Tao checked the information on his mobile phone and said: "Chen Xinjie never skipped class, his homework was handed in on time, his compulsory experiments were successfully completed, and he took the initiative to clean the laboratory. It seems that Chen Xinjie is a diligent and fantastical boy. ”

"Oh, got it. Shen Qi wrote a score on Chen Xinjie's test paper, 63 points.

"Professor Shen is very good. Xiao Tao laughed, if she was to give the final score, Chen Xinjie was afraid that he would have to fail the course.

"I used to be pretty bad. Shen Qi told the truth, "In the early years, there were countless students who failed under me, and I used to think that the most important thing for people who study mathematics and physics is talent, which is the perfect combination of imagination and rigorous logic. Students can not attend my class, as long as they can solve my problem, I will give him a high score, even a full score. ”

Xiao Tao suddenly realized: "I heard that there is a class of students in the School of Physics, and seventy-three percent of the final exams in electrodynamics have failed...... That test paper was written by you, Professor Shen!"

Shen Qi said: "That electrodynamics paper is indeed difficult, Xiao Tao, you can't just look at the seventy-three percent that hung up, isn't there still twenty-seven percent of the students in the Academy of Physics who passed that year." ”

"I ...... I'm the student of the Academy!" Xiao Tao sweated profusely.

"Such a coincidence?" Shen Qi was quite surprised, and asked again: "That paper, Xiao Tao, how many points did you score?"

"59.5......" Xiao Tao was so complaining, she stared at Shen Qi pitifully, and asked: "Now Professor Shen, can you tell me, where is the 0.5 point deduction? Professor Shen, you were really bad before......"

"At that time, Xiao Tao, you were in your third year of college, and now you are studying for a Ph.D., so long has passed, I can't remember the details. Hehe, that's not the point, isn't the focus of today's discussion of this quantum physics test paper?" Shen Qi smiled, and persuaded Xiao Tao to go with the wind yesterday, and the most important thing is to live in the present. ()

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