Physicists Entangle Quantum Memories Across a Record-Breaking 420 Kilometers

2026-08-19 | original

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Why This Matters

This breakthrough in entangling quantum memories over a record-breaking 420 kilometers marks a significant step toward developing a global quantum internet. Such advancements could revolutionize secure communication and quantum computing, impacting both industry and consumers by enabling faster, more secure data transmission. The research demonstrates the potential for scalable quantum networks that could transform digital infrastructure worldwide.

Key Takeaways

Sets a new record for quantum entanglement distance at 420 km.
Advances the development of a secure, global quantum internet.
Potentially enables faster, more secure communication and computing capabilities.

alternative_right shares a report from Phys.org: Optical fibers are already the backbone of global communication systems. Recently, however, physicists have started to explore how their functionality could be boosted further by conveying information via entangled quantum particles -- potentially enabling instantaneous exchanges of information across vast distances. Such a system could eventually be the basis of a future 'quantum internet,' offering a level of security and computing power beyond anything possible today. In new research published in Physical Review Letters, a team led by Xi-Yu Luo at the University of Science and Technology of China in Hefei has pushed that vision further than ever, entangling two quantum memories across 420 kilometers (261 miles) of optical fiber -- more than four times the previous record.