Chapter 127

In 1935, Einstein, Bodor driver and Rosen put forward a very famous thought experiment.

Later generations used their initials to call the EPR experiment.

This experiment means that the "Circular" state of two particles A and B can be prepared, so that in this state, the sum of some properties of the two particles (such as the spin angular momentum of electrons and the polarization of photons) is equal to zero, while the property of a single particle is uncertain.

Such a pair of particles is called "EPR pair", which belongs to the "entangled state" in quantum mechanics.

In fact, the purpose of the earliest EPR experiment was to support Einstein's own point of view, but the magic thing was that in 1980, aspeckert et al. Did the EPR experiment and determined that the EPR phenomenon was actually a real effect.

This is also the black spot of many love Black's tireless and repeated whipping of corpses,

However, they completely ignore that if they only care about the results of quantum mechanical measurements, EPR correlation will not transfer information faster than the speed of light. This problem will only occur when the wave function is regarded as a physical reality.

The topic returns to EPR phenomenon.

It is based on the fact that the EPR phenomenon is true by the real hammer, which has the experimental basis of quantum teleportation.

as everyone knows.

The basic idea of quantum teleportation is as follows:

This article was later selected as the "21 classic papers on physics in a century" in the journal Nature.

Juxtaposed with it include Roentgen's discovery of X-rays, Einstein's establishment of relativity, Watson and Crick's discovery of DNA double helix structure and so on. This lineup is so powerful that it is frightening.

The importance of this article in related fields is almost similar to the contribution of Ping'an grad campaign to World War II.

If you pay more attention to scientific research information, you should remember the following news from Yize in the past 15 years:

Pan Jianwei project team of China University of science and technology has made a major breakthrough in quantum instantaneous transmission technology.

This achievement was later rated as the first of the top ten breakthroughs in physics in 2015 by the British Physical Society and the first of the top ten advances in Chinese Science in 2015 by the Ministry of science and technology of China.

Yes, it's also pan Shuai. (he is also Ben's mentor... Although I switched to high energy physics later)

In 1997, pan Jianwei realized the quantum teleportation of a single degree of freedom of a single photon, and in 2015, he realized the quantum teleportation of multiple degrees of freedom of a single photon.

So those who say that there are no talents in Chinese official physics are really stupid and black.

The line of sight returns to quantum teleportation.

There is a saying in Laozi in China, which is called "Tao gives birth to one, life to two, two gives birth to three, and three gives birth to all things".

Now the local quantum teleportation can be said to have realized the Tao generating one and the life generating two, two and three, but it is still very far from the three generating all things.

Because this' everything 'is too big.

12 grams of carbon atoms are 1 mole, that is, 6.023 * 10 ^ 23.

If a person weighs 60 kilograms, there are about 5000 moles of atoms, that is, 3 * 10 ^ 27.

Describe the state of an atom in terms of ten degrees of freedom.

So to describe a person, you need a degree of freedom of the order of 10 ^ 28 - few people who don't understand the concept of degree of freedom can change the word into money.

But the hardest thing is to step out