An experiment by Australian scientists has proven that what happens to particles in the past is only decided when they are observed and measured in the future. Until such time, reality is just an abstraction.
The Australian scientists set up an experiment similar to the double-slit one to try to estimate when particles took on a particle or wave form.
But instead of using light, they applied helium atoms, which are "heavier" than light photons, in the sense that photons have no mass, whereas atoms do. This was significant they said.
“Quantum physics predictions about interference seem odd enough when applied to light, which seems more like a wave, but to have done the experiment with atoms, which are complicated things that have mass and interact with electric fields and so on, adds to the weirdness,” said PhD student Roman Khakimov, who was involved in the experiment.
Nevertheless, they expected the atom to behave just like light, meaning that it would take on both the form of a particle and/or a wave. This time they fired the atoms at two grate-like forms created by lasers, although the effect was similar to a solid grate.
However, the second grate was only put in place after the atom had passed through the first one. And the second grate wasn't applied each time, only randomly, to see how the particles reacted differently.
What they found was that, when there were two grates in place, the atom passed through it on many paths in a wave form, but, when the second grate was removed, it behaved like a particle and took only one path through.
So, what form it would take after passing through the first grate depended on whether the second grate was put in place afterward. Therefore, whether it continued as a particle or changed into a wave wasn't decided until a future event had already taken place.
Time went backwards. Cause and effect appear to be reversed. The future caused the past. The arrow of time seemed to work in reverse.
Isn't that like a really huge discovery?