May 8, 2021 09:52 PM
(This post was last modified: May 8, 2021 09:52 PM by C C.)
https://www.sciencealert.com/quantum-ent...opic-scale
EXCERPT: . . . "If you analyze the position and momentum data for the two drums independently, they each simply look hot," says physicist John Teufel, from the National Institute of Standards and Technology (NIST) in the US. "But looking at them together, 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."
While there's nothing to say that quantum entanglement can't happen with macroscopic objects, before now it was thought that the effects weren't noticeable at larger scales – or perhaps that the macroscopic scale was governed by another set of rules.
This new research suggests that's not the case. In fact, the same quantum rules apply here, too, and can actually be seen as well. Researchers vibrated the tiny drum membranes using microwave photons and kept them kept in a synchronized state in terms of their position and velocities.
To prevent outside interference, a common problem with quantum states, the drums were cooled, entangled, and measured in separate stages while inside a cryogenically chilled enclosure. The states of the drums are then encoded in a reflected microwave field that works in a similar way to radar.
Previous studies have also reported on macroscopic quantum entanglement, but the new research goes further: All of the necessary measurements were recorded rather than inferred, and the entanglement was generated in a deterministic, non-random way... (MORE - details)
EXCERPT: . . . "If you analyze the position and momentum data for the two drums independently, they each simply look hot," says physicist John Teufel, from the National Institute of Standards and Technology (NIST) in the US. "But looking at them together, 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."
While there's nothing to say that quantum entanglement can't happen with macroscopic objects, before now it was thought that the effects weren't noticeable at larger scales – or perhaps that the macroscopic scale was governed by another set of rules.
This new research suggests that's not the case. In fact, the same quantum rules apply here, too, and can actually be seen as well. Researchers vibrated the tiny drum membranes using microwave photons and kept them kept in a synchronized state in terms of their position and velocities.
To prevent outside interference, a common problem with quantum states, the drums were cooled, entangled, and measured in separate stages while inside a cryogenically chilled enclosure. The states of the drums are then encoded in a reflected microwave field that works in a similar way to radar.
Previous studies have also reported on macroscopic quantum entanglement, but the new research goes further: All of the necessary measurements were recorded rather than inferred, and the entanglement was generated in a deterministic, non-random way... (MORE - details)
