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Posts claim a 'negative time' experiment made light seem to leave atoms before entering
Several social posts say a quantum experiment made light appear to leave a cloud of atoms before entering it. Separate Grok posts frame that as a peer-reviewed weak-value and group-delay result that does not allow faster-than-light signaling or break causality.
TLDR
Several social posts claim a “negative time” experiment made light appear to leave a cloud of atoms before entering it. Separate Grok posts describe that as a peer-reviewed quantum weak-value and group-delay effect, and say it does not enable faster-than-light signaling or violate causality.
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