Science, Space and Technology News 2024
Researchers have produced, stored, and retrieved quantum information for the first time, a critical step in quantum networking.
To do this requires a means to store the quantum information and retrieve it again: that is, a quantum memory device. This must ‘talk’ to another device that allows the creation of quantum information in the first place. Classical repeaters, however, cannot be used with quantum information, as any attempt to read and copy the information would destroy it. This is an advantage in one way, as quantum connections cannot be ‘tapped’ without destroying the information and alerting the users. But it is a challenge to be tackled for long-distance quantum networking.
Photons have certain wavelengths , but devices for creating and storing them are often tuned to work with different wavelengths, preventing them from interfacing. “The breakthrough this time was convening experts to develop and run each part of the experiment with specialist equipment and working together to synchronise the devices.” —While independent quantum dots and quantum memories have been created that are more efficient than the new system, this is the first proof that devices can be made to interface, and at telecommunications wavelengths.
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