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It's a strange phenomenon that Einstein described as " spooky action at a distance", but it's fascinating to scientists. In a study conducted in 2021, quantumentanglement was observed and recorded at a scale much larger than the particles normally associated with it.
The dimensions are small, but in the realm of quantum physics they are enormous.
According to physicist John Teufel from the National Institute of Standards and Technology in the US, the position and momentum data for the two drums each look hot.
We can see that what looks like random motion of one drum is highly correlated with the other in a way that is only possible through quantum entanglement.
It was thought that the effects of quantumentanglement weren't noticeable at larger scales, or that the scale was governed by another set of rules.
That isn't the case according to the recent research. The same quantum rules can also be seen here. The tiny drum membranes were kept in a synchronized state after researchers vibrated them with microwaves.
The drums were cooled, entangled, and measured in separate stages in order to prevent interference with quantum states. Similar to radar, the states of the drums are reflected in a microwave field.
The research done in 2021 went further than previous studies in that all of the necessary measurements were recorded rather than inferred, and the entanglement was generated in a deterministic, non- random way.
Researchers have shown how it's possible to measure the position and momentum of the two drumheads at the same time in a series of experiments.
The drumheads exhibit a collective quantum motion in our work. When one of the drums is in an end position of the vibration cycle, the other is in a different position.
If the two drums are treated as one quantum mechanical entity, the quantum uncertainty of the drums' motion is canceled.
The idea that position and momentum can't be perfectly measured at the same time is known as the Uncertainty Principle. Recording either measurement will interfere with the other through a process called quantum back action, according to the principle.
As well as backing up the other study in demonstrating quantum entanglement, this particular piece of research uses that to investigate the relationship between classical physics and quantum physics.
One of the potential future applications of both sets of findings is in quantum networks, which can be used to power next-generation communication networks.
In a commentary on the research published at the time, physicists Hoi-Kwan Lau and Aashish Clerk wrote that the experiments addressed how far into the macroscopic realm experiments could push the observation of quantum phenomena.
Two studies were published in Science.
The first version of this article was published in May of 2011.
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