Scientist solves quantum between two atoms via optical fiber.
REPUBLIKA.CO.ID, GERMANY — Researchers in Germany demonstrate quantum snare of two atoms separated by optical fiber 33 km long. This is a distance record for communication and marks a breakthrough towards internet kuantum which is fast and safe.
Reported from New Atlas, Monday (11/7/2022), quantum entanglement is an extraordinary phenomenon where two particles can become so closely related. Changing something about one particle will instantly change its partner, no matter how far apart they are.
That leads to the implication that information is being “teleported” faster than the speed of light. This was an idea too exaggerated even for the physicist Albert Einstein, who famously described it as “spooky action at a distance”.
Reported from Space, this is a phenomenon in which one particle can effectively “know” something about another particle instantly, even if the two particles are separated by great distances. noose quantum has been consistently demonstrated in experiments for decades.
Scientists take advantage of its peculiar nature to rapidly transmit data over long distances. In the new study, researchers from Ludwig-Maximilians-University Munich (LMU) and Saarland University have now solved the quantum between two atoms via an optical fiber.
In their experiment, the team ensnared two rubidium atoms stored in optical traps in two different buildings on the LMU campus. They are separated by a 700 m optical fiber, which is extended to 33 km with additional cable reels.
The photons are then sent down the fiber optic cable to meet at the receiving station in the center. There, the photons undergo a joint measurement, which ensnares them. Since each has become entangled with its own atom, the two atoms become entangled with each other as well.
The research marks a new distance record for entangling two atoms, which can serve as “quantum memory” nodes, through an optical fiber. The key is photos mediates are converted to longer wavelengths so that they travel further through their natural wavelength-fiber.
The team says this is an important step towards realizing a practical quantum internet. Such communication networks would be much faster and more secure than those used today.
This technology can be paired with technologies such as satellites, which have previously demonstrated the ability to emit entangled photons over thousands of kilometers. This research was published in the journal Nature.
