Scientists observe 'negative time' in quantum experiments

[mahatmakanejeeves]

20 hours ago
Scientists observe 'negative time' in quantum experiments

by Ben Simon, Issam Ahmed in Washington


Experimental physicist Daniela Angulo poses with an apparatus in the physics lab at the University of Toronto.

Scientists have long known that light can sometimes appear to exit a material before entering it—an effect dismissed as an illusion caused by how waves are distorted by matter.

Now, researchers at the University of Toronto, through innovative quantum experiments, say they have demonstrated that "negative time" isn't just a theoretical idea—it exists in a tangible, physical sense, deserving closer scrutiny.

The findings, posted on the preprint server arXiv but not yet published in a peer-reviewed journal, have attracted both global attention and skepticism. … The researchers emphasize that these perplexing results highlight a peculiar quirk of quantum mechanics rather than a radical shift in our understanding of time.

"This is tough stuff, even for us to talk about with other physicists. We get misunderstood all the time," said Aephraim Steinberg, a University of Toronto professor specializing in experimental quantum physics.

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[CloudWatcher]

1. A decent video explaining this ...

I thought Sabine Hossenfelder's video on this was really good:

[dickthegrouch]

2. Love the lighthearted delivery of a complicated subject

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