A recent collaboration between Chinese and South African researchers has tested a quantum microsatellite that successfully transmitted images across 12,900 kilometers using quantum key distribution. This project lays the groundwork for future quantum networks, with aspirations for a global-scale system enhancing communication, computing, and sensing.
A collaborative effort between Chinese and South African researchers has led to the testing of a quantum microsatellite, potentially marking the onset of a global quantum communication network. Using a lightweight device and portable ground stations, the team successfully established a record in quantum communications.
The researchers transmitted two images—one depicting the Great Wall of China and the other showcasing Stellenbosch campus—over a remarkable distance of 12,900 kilometers (approximately 8,000 miles). This was achieved through a shared encryption key, demonstrating the satellite’s capabilities.
In their published findings, the team stated, “[We] report the development of a quantum microsatellite capable of performing space-to-ground quantum key distribution using portable ground stations.” The success of this project is seen as a stepping stone towards launching multiple microsatellites.
The vision includes establishing an extensive network of optical ground stations, which could culminate in a practical quantum constellation. Ultimately, the researchers anticipate, “A global-scale quantum network with revolutionary communication, computing and sensing capabilities is anticipated in the near future.”
The recent advancements in quantum microsatellite technology by a Chinese-South African team may herald a significant evolution in global communications. By successfully transmitting images over unprecedented distances using quantum key distribution, they pave the way for a future network that promises transformative capabilities in communication, computing, and sensing. This initiative is a promising step towards achieving a practical quantum constellation.
Original Source: www.scmp.com
