Quantum memory in the cloud-a cold, metallic gas cloud

As Ars readers know, a computer requires programmable logic gates, memory, a bus, a way to set the initial memory state, and a way to read out the final state. Gather all these components and you, too, can reinvent the wheel in your parents' garage. A quantum computer requires all the same elements, but instead of going to Circuit City, you need a well-funded research lab to assemble tons and tons of equipment into something that, currently, almost works. Improvements to these components will be essential to get quantum computers to do more than that, so it's big news that researchers have demonstrated quantum memory with storage times up to 1ms, an improvement of two orders of magnitude over current tech.

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