For the first time, physicists have convincingly demonstrated that physically separated particles in solid-state devices can be quantum-mechanically entangled. The achievement is analogous to the quantum entanglement of light, except that it involves particles in circuitry instead of photons in optical systems. Both optical and solid-state entanglement offer potential routes to quantum computing and secure communications, but solid-state versions may ultimately be easier to incorporate into electronic devices.
Off topic, concerning Wolphram Alpha: use FunctionExpand[...] in order to simplify mathematical expressions. I wanted to add this comment to the StackExchange page on which you left a comment not too long ago, but for some reason it got rejected.
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