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Quick that the time passes.
On April 20, Academician Lu returned to gold/metal big to meet from Shanghai, after the conference ended, making the land boat go to an office.
land Zhou passing through the gate, the old person then looks, asked with a smile.
„Preparation how?”
land Zhou: „Similar...... also looked at the professor to show mercy.”
Academician Lu: „Was similar? That line, I tested your two problems to be good casually.”
Saying, he opens the drawer, pulls out a a4 paper from inside, placed on the table.
„Did pen here, write with the past?”
land Zhou received the written records, looked at the eye above topic, the brow twitched ruthlessly under.
Two problems of reaching an agreement, on the paper clearly write three problems.
Moreover reaches an agreement tests casually, which problem in does not seem like the easy appearance......
Rwandan academician was asking: „What's wrong, can't understand?”
„How can,” land boat smile, looks to the topic, on the face appears the thinking expression, „seems like, is not quite a little easy.”
Rwandan academician smiles has not spoken, turned upwards one leg on the other, waits for him to take up the pen.
It is not quite easy?
If this were easy, what meaning that also does test has?
How saying that he is also an academician, the graduate student who the academician leads, can be the same with the graduate student who the ordinary professor leads?
These topics did not do to the graduate student, but is he incurs the postgraduate candidate the time, takes away to inspect these interview the expertise level.
Three problems can make two, that was qualified, if three problems can make three, that it can be said that was outstanding.
Four postgraduate candidates who he leads, can present three problems the level. The topic of although examining is not same, but the level is similar.
When Rwandan academician waits for the landing boat takes up the pen, land Zhou rapidly three problems had crossed, then looked to the first topic, was to him an easiest problem.
The first topic, what inspection is the group theory.
However, inspection is actually not the group theory in math, but is the application of group theory in quantum mechanics.
Because „group theory” this mathematical branch is before „quantum mechanics” appears is created by the mathematician independently, not by the physicist and mathematician establishes like „calculus” together. Therefore, group theory regarding the physicist is „imported product”, studies difficultly, uses is not inconvenient.
However regarding „mathematical birth”, reentry „mathematical physics” the land boat, processing is actually not such difficulty.
【The group theory explanation of hydrogen atom energy level accidental degeneracy】
The topic is very short, the information content is big.
The degeneracy of hydrogen atom is higher than the phenomenon of common atom to be called „accidental degeneracy”. However the traditional quantum mechanics unable to explain accidental degeneracy phenomenon, makes this phenomenon obtain explanation theoretically to the introduction of group theory.
Closes the eye, land Zhou in the quantum mechanics knowledge that in the brain recalled was previously learning, is recalling about hydrogen atom all.
Then, with the method model building of math......
Opens the eyes, the land boat deep breath one breath, finally with beginning a stroke, and writes on the paper.
【Made the hydrogen atom Hamiltonian operator be h = p 2 / 2-ze 2 / r......】
【System in Coulomb potential situation has a Runge Lenz vector, is m'=......】
【Eigenvalue c = of group casimir operator......】
【......】
Saw that land Zhou presents the topic the speed, the eyebrow of Academician Lu selected selecting slightly.
He thinks land Zhou in this problem at least must spend 20 minutes pondered, never expected that he has taken up the pen.
Moreover, the mentality is absolutely correct.
Originally he also planned, when the land boat cannot think takes two mouths, but now looks like, does not use.
【Regarding energy level e ( n + 1 ) and quantum number( n, 1) related degeneracy is Σ2 ( l + 1 ) = n 2......】
Sees the answer, Academician Lu in the heart nods silently.
The first topic, correct!
Has not paid attention to look at Academician Lu the expression on face, land Zhou continued the downward problem to throw the dedicated line of sight.
The second problem, in some issues of Dirac hole theory about quantum field theory, what inspection is the understanding of the dirac equation and some theoretical knowledge about the field theory.
This pure knowledge, no difficulty regarding the land boat, in the dedicated condition of medicine guidance, looked the thing will not basically forget.
To him , compared to need to think slightly a while the first topic, this delivers a minute of topic together.
Has not stayed, land Zhou takes up the pen quickly, answers various theoretical questions that in the topic asked with the argumentative language.
Saw that land Zhou made this problem, on the face of Academician Lu appeared a gratified smiling face.
Good, he has not truly been mistaken.
This boy is the good seedling of research theoretical physics, by talent that he shows now, four postgraduate candidates who even lead compared with him, inherit his mantle hopefully.
If were not the school has given him to make the personnel training plan to lead to higher platform, he has even thought that made him straight consider as finished in oneself here simply abundantly.
Naturally, he also thinks, goes to a higher platform to derive the scientific research nutrient, he also supports.
Solved the second problem, land Zhou continued to look to the third problem.
When sees the third problem, he gawked under.
The third problem, is together about „string theory” topic.
The so-called string theory, mainly tries to solve the incompatible two main physics theories in surface, description entire universe that namely contradiction between the quantum mechanics and general theories of relativity, and wants to create „myriad things theory”, is in the legend „universal theories”.
Then, the discovery of this theory, but also has a big origin with the math.
Chino of cern work, wants to find description atomic nucleus the mathematical formula of strong action, finally found in an obsolete mathematical book the Euler's formula that has 200 years, and discovered the description that accidentally/surprisingly this formula can succeed he requests the solution the strong action.
This sounds like chivalric fiction novel inside plot, but the fact is such coincidence.
Under such coincidence, the embryonic form of string theory was then born.
Including afterward wave color string theory and ultra string theory, „series rivers and lakes that” and renowned Edward Witten proposed m theory, was develops based on this.
Establishes description universe myriad things „universal formulas”, this is almost the ultimate objective of theoretical physics.
However what is quite awkward, domestic string metaphysics at a very awkward aspect.
The coherence physics stands in the opposite of theoretical physics not to mention, the theoretical physics educational world does not seem willing to admit this „mathematical anomaly”.
Even including the domestic theoretical physics expert , a Venerable Yang the world's most influential physicists, had then expressed to viewpoint that the string theory thinks otherwise. On the contrary is the domestic mathematics circles, has the admission and open attitude on the string theory. For example Venerable Qiu, the straddling of zones gives string theory „a to praise”.
However what makes the land boat somewhat ponder over to be airtight, this third topic examination is not the knowledge node of string theory, but asked oneself to the view of string theory.
View?
To the view of theory? To view of metaphysics?
Is this together the subjective topic?
The pen tip stopped on the paper was very long, overcame one difficulty after another land boat of last pass/test, suddenly some fans.
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