An improved version of quantum key distribution. The Internet is filled with highly sensitive data. In general, sophisticated encryption techniques guarantee that such material cannot be intercepted and read. However, in the future, high-performance quantum computers could break these keys in a mat
There are many methods for exchanging quantum mechanical keys. The transmitter sends light signals to the receiver, or entangled quantum systems are employed. The scientists employed two quantum mechanically entangled rubidium atoms in two labs 400 meters apart on the LMU campus in the current experiment. The two facilities are linked by a 700-meter-long fiber optic cable that runs under Geschwister Scholl Square in front of the main building.with a laser pulse.
In contrast to earlier approaches, the implemented protocol, which was developed by researchers at NUS, uses two measurement settings for key generation instead of one: “By introducing the additional setting for key generation, it becomes more difficult to intercept information, and therefore the protocol can tolerate more noise and generate secret keys even for lower-quality entangled states,” says Charles Lim.
“With our method, we can now generate secret keys with uncharacterized and potentially untrustworthy devices,” explains Weinfurter. “These two projects lay the foundation for future quantum networks, in which absolutely secure communication is possible between far distant locations,” says Charles Lim.
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