Summary of the Article: Breakthrough in Quantum communication Distance
this article details a significant advancement in quantum communication, achieved by Professor Tian Zhong and his team at the University of Chicago. Here’s a breakdown of the key points:
* The Problem: Quantum communication is limited by the fragility of quantum coherence - the time atoms can maintain their quantum state. This directly restricts the distance over which quantum information can be reliably transmitted. Previously, quantum computers even within a city (like Chicago and its downtown) couldn’t connect.
* The Solution: The team dramatically increased the quantum coherence time of erbium atoms from 0.1 milliseconds to over 10 milliseconds (and up to 24 milliseconds). This 100-fold increase theoretically allows for quantum communication over distances of 2,000-4,000 kilometers.
* How They Did It: Instead of conventional crystal creation (melting and sculpting), they used molecular beam epitaxy – a “3D printing” method that builds crystals layer by layer, atom by atom. This results in exceptionally pure materials with superior quantum properties.
* Importance: This is a major methodological breakthrough,applying a known technique (molecular beam epitaxy) to a new area (quantum materials). Experts consider it a significant step towards scalable qubit production.
* Next Steps: The team will test the technology in the lab, simulating long-distance connections with coiled cable and building a local experimental network. The ultimate goal is a global quantum internet.
In essence, this research overcomes a major hurdle in building a practical quantum internet, moving it from science fiction closer to reality. The key is a new,more precise method of creating the materials needed for quantum entanglement.
