I'm not sure about that. I suppose it really depends on your interpretation of the results, but I didn't think the cosmic interferometer experiment convinced physicists of retrocausality, by-and-large.
Functionally it means we can trace a single photon back to the source which emanated it, lensed or unlensed. That said, if quantum effects are not bound by time or space technically the photon ALWAYS came from an individual source and our clarifying which one it came from just collapses the wave from superposition of where the photon could go to where it did go.
As I understand the double slit experiment, this is a fundamental property of light as a photon exhibits wave-particle duality. If so, retrocausality in this case would just mean the fundamental wave function can be collapsed into actuality without time or space being involved.
As I understand the double slit experiment, this is a fundamental property of light as a photon exhibits wave-particle duality. If so, retrocausality in this case would just mean the fundamental wave function can be collapsed into actuality without time or space being involved.
Am I far off base?