HN Reader

I am more interested in its explanation, now that the theory has been proven correct again and again.

Especially interested in "delayed choice quantum erasure experiment", where you decide to determine the "which path" after the photon has passed through the slits and hit the detector. And depending on your later decision the photon seems to rewrite history going back in time.

It seems that photons propagate as massless non-local waves, but become localized when they bounce off an already local, massy particle. In other words, electromagnetic radiation is a fundamentally continuous phenomenon in a continuous field, but emission, absorption and other interactions can only happen as discrete events (quanta).

Maybe someone in the field can speak up -- I'm not sure what is new about this study. It seems to be about an analysis of the double-slit experiment using individual atoms, and the press release implies that this is novel, but that experiment was first done over 30 years ago [0]. Is there anything to this study that is actually new?

0: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.70...

Can anyone explain what sort of "detector" is used to detect the photons? Is there a standard across all double-slit experiments?

I feel like the type of detector would have a significant impact on the outcome of the experiment, but explanations for layman always leave it out.

I don't get the point. The article says that if you "somewhat" measure, then you lose "somewhat" from the wavelike nature. So the photon is a wave by X%, and a particle by 100-X%?

The simulation rolls back to match the constraints, easy

Quantum Interference 1: A Simple Example:

https://profmattstrassler.com/2025/03/18/quantum-interferenc...