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100-channel single-photon detector opens doors to quantum internet

Scientists in China have built a 100-channel single-photon detector that could help develop broadband quantum-based networks in China.

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Interesting Engineering (interestingengineering.com)
]]>https://citiverse.it/topic/4e46efbf-6602-4b22-99b5-232edad091d6/100-channel-single-photon-detector-opens-doors-to-quantum-internetRSS for NodeTue, 03 Nov 2026 05:32:35 GMTFri, 23 Oct 2026 22:38:18 GMT60<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Mon, 26 Oct 2026 22:17:31 GMT]]>Entanglement cannot be used to send signals faster than light, and when "teleportation" was named, the model the physicists had in mind was Star Trek style teleportation, where you scan the original copy in a way that is destructive to it, transmit that information elsewhere, and then reconstruct it. That transmission step is still through a classical information channel so it cannot be faster than light. It was not named that way after magical fantasy teleportation where something just disappears from one location and instantly appears in another. It was an analogy to how the algorithm works: quantum mechanics forbids cloning a state, but you can semi-get around this by cloning it in a destructive way, so that the state you never have two systems,at the same time, hold the state you are trying to copy.

]]>https://citiverse.it/post/https://lemmygrad.ml/comment/8887726https://citiverse.it/post/https://lemmygrad.ml/comment/8887726Mon, 26 Oct 2026 22:17:31 GMT<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Mon, 26 Oct 2026 19:25:38 GMT]]>So entanglement and teleportation aren't practical for this?
the max travel speed might be light but the time to process that information and react to it can be reduced. I'm not sure tho. But I strongly remember reading articles about this.

]]>https://citiverse.it/post/https://programming.dev/comment/26724601https://citiverse.it/post/https://programming.dev/comment/26724601Mon, 26 Oct 2026 19:25:38 GMT<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Mon, 26 Oct 2026 12:44:56 GMT]]>It can't be faster than the speed of light and radio already travels at the speed of light.

]]>https://citiverse.it/post/https://lemmygrad.ml/comment/8885396https://citiverse.it/post/https://lemmygrad.ml/comment/8885396Mon, 26 Oct 2026 12:44:56 GMT<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Mon, 26 Oct 2026 06:45:20 GMT]]>Well yes, not instantaneous instantaneous. But near-instant as far as I know. Much much faster than current speeds.

]]>https://citiverse.it/post/https://programming.dev/comment/26714531https://citiverse.it/post/https://programming.dev/comment/26714531Mon, 26 Oct 2026 06:45:20 GMT<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Mon, 26 Oct 2026 00:45:51 GMT]]>Quantum internet does not allow instantaneous communication. That would violate the no-communication theorem. It's physically impossible.

]]>https://citiverse.it/post/https://lemmygrad.ml/comment/8883552https://citiverse.it/post/https://lemmygrad.ml/comment/8883552Mon, 26 Oct 2026 00:45:51 GMT<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Sat, 24 Oct 2026 12:30:53 GMT]]>They're not a silver bullet, but they have their usecases. Quantum internet can be very interesting due to instantaneous communications. But for general purpose computing, a hybrid approach of quantum+classical is most probably the way to go. There's limited use cases for quantum computing in general computing.

]]>https://citiverse.it/post/https://programming.dev/comment/26686434https://citiverse.it/post/https://programming.dev/comment/26686434Sat, 24 Oct 2026 12:30:53 GMT<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Sat, 24 Oct 2026 11:26:15 GMT]]>there's some quantum versions of algorithms that scale better than the digital version. ranging from quadratic to exponential speedup. Notably very fast at breaking currently widely used encryption.
We are only saved by the fact quantum computers don't have the required processing power to be feasible to use yet.

There's some encryption algos that are thought to be resistant against quantum attacks but due to the above this isn't actually proven yet, so currently any "post-quantum encryption" is currently a marketing buzzword with nothing behind it.

]]>https://citiverse.it/post/https://lemmy.ml/comment/28512394https://citiverse.it/post/https://lemmy.ml/comment/28512394Sat, 24 Oct 2026 11:26:15 GMT<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Sat, 24 Oct 2026 05:05:40 GMT]]>I don't understand anything about quantum computers. Are they useful? What do they do?

]]>https://citiverse.it/post/https://lemmy.ml/comment/28509326https://citiverse.it/post/https://lemmy.ml/comment/28509326Sat, 24 Oct 2026 05:05:40 GMT<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Sat, 24 Oct 2026 04:21:37 GMT]]>AI can take your job even faster! Also eggs cost $50 now!

]]>https://citiverse.it/post/https://feddit.nl/comment/28292268https://citiverse.it/post/https://feddit.nl/comment/28292268Sat, 24 Oct 2026 04:21:37 GMT<![CDATA[Reply to 100-channel single-photon detector opens doors to quantum internet on Fri, 23 Oct 2026 23:53:04 GMT]]>we're gonna get quantum propaganda now!

]]>https://citiverse.it/post/https://lemmy.ml/comment/28506216https://citiverse.it/post/https://lemmy.ml/comment/28506216Fri, 23 Oct 2026 23:53:04 GMT