QuantumInternet
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Los Alamos National Lab has had quantum-encrypted internet for over two years
Nothing locks down data better than a laser-based quantum-encrypted network, where the mere act of looking at your data causes it to irrevocably change. Although such systems already exist, they're limited to point-to-point data transfers since a router would kill the message it's trying to pass along just by reading it. However, Los Alamos National Labs has been testing an in-house quantum network, complete with a hub and spoke system that gets around the problem thanks to a type of quantum router at each node. Messages are converted at those junctures to conventional bits, then reconverted into a new encrypted message, which can be securely sent to the next node, and so on. The researchers say it's been running in the lab for the last two and a half years with few issues, though there's still a security hole -- it lacks quantum integrity at the central hub where the data's reconverted, unlike a pure quantum network. However, the hardware would be relatively simple to integrate into any fiber-connected device, like a TV set-top box, and is still more secure than any current system -- and infinitely better than the 8-character WiFi code you're using now.
Scientists create the first universal quantum network, are scared to restart the router
We all know that most networks are, well, just not "quantumy" enough. Good news, then, that German boffins at the Max Planck Institute of Quantum Optics have created the first "universal quantum network." We've been hearing about plain old quantum computing since the first qubit was sent, but now we have to get our tiny minds around the idea of a quantum internet too. Data was sent using single rubidium atoms in reflective optical cavities and single photons emitted over optical fiber. Given that data was only successfully transmitted 0.2% of the time, and the network spanned just 21 meters, a complex LAN with multiple nodes is a way off just yet, but the proof of concept is there. If that concept is the early '90s internet that is.
Electromagnetically induced transparency could create a quantum internet, quantum memes
The transistor ushered the modern world of gadgets that we all love, and now optical transistors could help to bring us to the proper next generation of the internet. Researchers at the Max Planck Institute of Quantum Optics have demonstrated successful electromagnetically induced transparency, or EIT, which is effectively a way of enabling one beam of light to control another. In their experiments, researchers used a rubidium atom to indicate state, blocking a beam of light in one direction but, when a laser hit it at a perpendicular angle, turning it transparent to allow the first beam through. The idea is that this could serve as a sort of optical gate for quantum computers; the building block of a next-gen internet for next-gen devices. There's reason for excitement about the potential here, but researchers have a long, long way to go before anything like this is ready for reality, so don't give up those handlinks just yet.
