Laser‑written glass chip pushes quantum communication toward practical deployment
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Laser‑written glass chip pushes quantum communication toward practical deployment

As quantum computers continue to advance, many of today's encryption systems face the risk of becoming obsolete. A powerful alternative—quantum cryptography—offers security based on the laws of physics instead of computational difficulty. But to turn quantum communication into a practical technology, researchers need compact and reliable devices that can decode fragile quantum states carried by light.