Quantum entanglement is the connection of two particles or objects, however far apart – the properties of both of them are connected in a way that is not possible under the rules of physical physics.
It’s a strange phenomenon that Einstein described as “spooky action at a distance,” but its weirdness is what makes it so fascinating to scientists. In a 2021 study, quantum entanglement was directly observed and characterized on a macroscopic scale—a scale much larger than the subatomic particles normally entangled.
These dimensions, which are still very small in our perspective, experiments involve two tiny aluminum drums a fifth of the width of a human hair – but in the realm of physical quantities they are absolutely enormous.
“If you analyze the position and momentum data for two drums independently, each one is simply hot,” said scientist John Teufel, from the National Institute of Standards and Technology (NIST) in the US last year.
“But looking at it together, we can see that the type of random movement of one drum is highly correlated with the other, just by the amount of possible involvement.”
It goes without saying that how much entanglement with macroscopic objects can’t be done before assuming that effects are not noticeable on larger scales – or perhaps that the macroscopic scale is governed by a different set of rules.
Recent research suggests that is not the case. For as much as can be said here also, can also be seen. Using photons, the researchers vibrated tiny membrane drums and kept them in a synchronous state based on their position and velocities.
In order to avoid the common problem with quantum states, the drums are cooled, complex, measured at distinct levels, inside a cryogenically cooled enclosure. The status of the drums is then encoded in the reflected field of the Proin which works in a similar way to radar.
Previous studies had also reported on the amount of macroscopic anxiety, but the 2021 research went further: All the necessary measurements were recorded rather than inferred, and the involvement was generated in a deterministic way, not randomly.
In a related but separate series of experiments, researchers also working with macroscopic drums (or oscillators) in a state of quantitative entanglement have shown how it is possible to measure the position and momentum of two drums simultaneously.
“In our work, the drums show a lot of collective movement,” said scientist Laure Mercier de Lepinay, from Aalto University in Finland. “The drums roll in opposite phase to each other, so that when one of them is at the end of the cycle of vibration, the other at the same time is in the opposite.”
“In this situation, the quantum hesitation of the drum movements is removed if the two drums are treated as a quantum-mechanical entity.”
What makes this headline news is that it gets around Heisenberg’s uncertainty principle — the notion that position and importance cannot be measured perfectly at the same time. The principle states that the recording of measurements interferes with each other, through a process called quantum posterior action.
As well as another study based on demonstrating macroscopic quantum entanglement, this particular uses a particle of research that avoids the involvement of quantum action backwards – essentially investigating the line between classical physics (where the Uncertain principle is) and quantum physics (where it now acts. T are seen).
One of the potential future applications of both discoveries is in quantum networks – being able to manipulate and entangle things on a macroscopic scale to power the next generation of communication networks.
“Beyond practical applications, these experiments will lead to the extent to which experiments in the macroscopic realm can drive the observation of distinctly quantitative phenomena,” physicists Hoi-Kwan Lau and Aashish Clerici, who were not involved in the study, write in a commentary. research published at the time.
Both the first and second meditations were published Science.
An earlier version of this article was published in May 2021.
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