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What is Lamb Shift?
Three: Myth in Myth

One day, if an old gentleman who has been teaching experimental classes for many years suddenly sees an experimental report handed over by a student,

The above measured data is 0.001159652188 (4). He must have laughed it off at first, and one of his classmates must have been lazy.

Press the calculator and don't even bother to change the effective figures. If he opens the book and finds that the theoretical value of this data is 0.00.

11596 52133 (29) You will fly into a rage and be excused for being lazy, but it is really shameless to fabricate data.

What's more, the error range is actually within 10 (- 10) (one tenth of a billion), which is ridiculous:)

Unfortunately, however, the data in front of him is conclusive, because the theory he faces is unprecedented in human history.

The most accurate theory-quantum electrodynamics.

Things have to start from the beginning. After the establishment of quantum mechanics and relativity, people have been trying to unify these two wonderful flowers.

Together. After many efforts, this great cause was finally completed in the hands of the great physicist Dirac. The famous d

Irac equation is a relativistic wave equation of quantum mechanics, which successfully explains the problems of hydrogen atomic energy level splitting.

. Dirac pointed out that the two energy levels 2S( 1/2) and 2P( 1/2) of hydrogen atom are actually the same, which was also true at that time.

Proved by experiments. It seems that everything is over perfectly, but God has played a joke on mankind again.

This joke is the famous lamb displacement experiment. After World War II, experimental microwave technology.

Has made great progress. (Ha ha, this is all due to the hard development of radars in various countries during World War II. Come to think of it, we

Being able to enjoy today's happy life, World War II really contributed. Nuclear energy, jets, rockets, computers,

Radar, etc. If it hadn't been for World War II, it would have been delayed for at least several decades. However, the great progress of this technology is actually

At the cost of more than 100 million lives, it is really,,,). In 1947, Lamb and Retherford used the method of radio spectrum.

Finally, it is found that the energy levels of 2S( 1/2) and 2P( 1/2) of hydrogen atom are not exactly the same, but there are energy levels differences.

This is the famous lamb displacement. Lamb himself won the Nobel Prize in 1955 for this wonderful and accurate measurement.

Physics prize.

This experiment was almost a disastrous blow to people at that time, but tenacious physicists learned from this lesson and finally

The idea of quantum electrodynamics was born. This theory, known as the most accurate in history, was born a freak. First of all,

It is its complicated calculation in mathematics that loses the beauty of simplicity in the legend of physics. Even Bohr is very disapproving.

His slogan is, I don't believe that God will describe its face to us in such a complicated way. Old Bohr is still heavy.

Immersed in the "concise" mathematical beauty of quantum mechanics. The second is that the mathematical method it uses is similar to series one.

The expansion of series is regarded as extreme heresy by many mathematicians who advocate analysis, because at least the convergence of expansion can't be achieved.

Promise. Third, it cannot be justified. Mathematicians' concerns are not unreasonable. The famous infrared divergence is one of them.

An insurmountable obstacle.

The last soldier solved the problem perfectly. 16-year-old physicist prodigy J.Schwinger counted.

Any technical problems in learning can be easily overcome. He used an extremely complicated form to understand quantum electrodynamics, saying that it

Renormalization is introduced to overcome divergence. R. Feynman, another genius

Legend has it that he explained quantum electrodynamics with extremely simple graph theory, which is the famous Feynman diagram (

Feynman figure). When people tried to fuse the ideas of these two geniuses, the other one was surprised.

People's news came from distant Japan, and the physicist Sin-Itiro Tomonaga was completely independent.

The third explanation of quantum electrodynamics came into being in this situation, and it seems to be correct. This time, people are completely

Finally, fortunately, there is no shortage of geniuses on our planet. Dyson, an American, finally confirmed these three with fabulous skills.

This statement is equivalent. Finally, in 1965, J. Schwinge, Feynman and Chao Yong enjoyed the Nobel Prize of that year.

Science award.

The success of quantum electrodynamics is unprecedented, which indicates that electrons and photons have been completely conquered by mankind. Found on 1900

The famous cathode ray-electron has no secrets so far, and all its secrets are controlled by human beings.

The data mentioned at the beginning is related to the G factor of the most private personal data in electronics. (the metric is a, a=(|g|-2)/2,

If electronic MM knew that her bust was measured to one billionth by physicists, would she turn pale with fear?

The accuracy of the experiment has reached one in ten billion, but all physicists stubbornly believe that this error still exists.

This is the result of the experiment. This is also a manifestation of human strong self-confidence.

Lamb shift experiment directly promoted the birth of quantum electrodynamics, which was enough to rank among the top ten physical experiments.