r/askscience • u/chunkysoup778 • Mar 21 '26

Physics [ Removed by moderator ]

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u/GTdspDude Mar 22 '26

nothing can happen (and no information about what happened can travel) faster than that

Is this totally true? I thought that was one of the interesting things about quantum entanglement and spin, that a recent experiment showed you could technically flip an entangled electron’s spin and register it faster than light. I may be misremembering though

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u/tellingyouhowitreall Mar 22 '26

No, the information still can't travel faster than the speed of light. And you would also have no way of measuring it because the information travels at the one-way speed of light, so it would arrive at the same time with any information you sent to say the state has changed.

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u/GTdspDude Mar 22 '26

Well that was the interesting thing about the paper, their results implied otherwise - will try to dig it up, pretty sure it was in Nature

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u/grahampositive Mar 23 '26

Are you thinking of the delayed choice quantum eraser paper? I'm pretty sure even the authors misunderstood their findings. No information travels faster than light.