Physicists report entangling two quantum memories across a record-breaking distance of 420 kilometers using optical fiber, according to research described by Phys.org and summarized by Slashdot. The work, led by Xi-Yu Luo at the University of Science and Technology of China in Hefei, is published in Physical Review Letters.
The study focuses on linking quantum memories via entangled quantum states, which the researchers say could support longer-distance quantum communication. Optical fibers are already widely used for transmitting information, but this approach aims to use entanglement to enable capabilities beyond today’s classical networks, including a potential foundation for a “quantum internet.”
Across outlets, the core emphasis is the record distance and the step forward compared with earlier experiments. Slashdot additionally highlights that the achievement is more than four times the previous record, while Phys.org concentrates more on the broader context of entanglement-based communication and future security and computing benefits. Neither source disputes the main experimental claim.
