The Storied History of the Spooky Physics Behind China’s Teleportation Success

The Storied History of the Spooky Physics Behind China’s Teleportation Success

God does not play dice with the universe. Play an ineffable game of your own design, which could be compared, from the perspective of one of the other players, to involve a dark and complex version of poker in a dark room, with blank cards, with infinite bets, With a merchant They will not tell you the rules, and a smile all the time.

In June 2017, a group of scientists in China announced that they had used the Micius satellite the country, launched a year ago, to teleport information between Earth and space in an instant.

In other words, they moved more than 500 km at any time. For this, they were based on a natural phenomenon known as quantum entanglement.

The name itself suggests that it belongs properly to the realm of quantum mechanics, the field of subatomic particles. The experience of Chinese scientists has surpassed the previous record, when in 2012 its leader had carried a team that had teleportation more than 97 km.

Very few ideas in science enjoy the popularity of teleportation: it was so incredible among scientists and laymen.

For more inspiration, what is fascinating is not how an object “leaves” a point in space and “passes” to another, but through the intermediate distance in an instant.

The consequences of these movements are important at first. The day we will be able to “pass” a person up and down through space – Star Trek – could still be far away, but, in the meantime, we could use quantum entanglement, for example, remote control of Digital security keys between two computers and prevent most forms of listening by hackers.

In previous experience, Jian-Wei Pan, professor of physics at the University of Science and Technology of China, Hefei, and his colleagues have used quantum entanglement to teleport information across Lake Qinghai in the west of the country.

Using an ultraviolet laser pointing at a barium crystal, the Pan equipment generates pairs of entangled photons.

Making personalized photons gives a good overview of the situation in which photons are present. It refers to the values ​​of some fixed variables.

If the variables have a particular combination of values, then the system is said to be in a particular state.

United States are generally independent of extrinsic properties such as mass. Therefore, the objectives of A and B are designed to see if the third interacting with these photons is in a similar state to the control group, even when they are separated by 97 km of space.

To measure this, researchers at A allow locally generated photons – that is, to themselves – to interact with altered incoming photons in a fixed and predictable way.

This state of change is then measured and compared to the state of the photons at B. Pan & Co. One found that the states of the modified A photons and those of the unmodified B photons were the same 80% of the time.

What is wonderful is that the particles do not have to end up with the same condition. Eighty percent is enough to rule out the coincidence.

This long-distance “communication” between the tiny and fragile particles shows that their pre-trip tangle was sustainable and gave rise to a predictable state that allows particles to behave similarly in both experiments to a very different extent.

The exact nature of this tangle, which Albert Einstein called “action at a distance from fear,” that most scientists are joking.

When two groups of photons are considered entangled, it means that the states in which the groups are linked together by means of a variable.

If the variable changes, the properties of the photons also change. However, the way in which the same groups are linked together does not change.

The existence of this variable is not challenged as much as expected. We have not yet found – assuming no.

And because it remains outside the realm of human control, teleportation experiments tend to leave this variable alone and focus on how measurement sites can be separated, the degree to which molecules can be effectively wound, and so on. The test limits.

For this, the photons are subject to a simplified treatment, one designed with the least amount of assumptions and the least sources of error.

Instead of groups of photons, physicists in both directions. The state that each means of such a pair can be defined as well. Say that both the particles are ‘a’ and ‘b’ and states that are ‘0’ and ‘1’.

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