The article implies, if I’m reading it correctly, that information can be passed between the entangled photons. If so, it might one day provide instantaneous communication with spacecraft. No time lag. We could drive a rover on Mars in real time.
subspace communications??? real??
“The article implies, if I’m reading it correctly, that information can be passed between the entangled photons. If so, it might one day provide instantaneous communication with spacecraft.”
I don’t think that is the way this experiment works. They take paired (entangled) photons, split the pair, shine one half on the stencil and let the other draw the picture. Both photons are moving at the same speed, the speed of light. The information BETWEEN the photons travels instantaneously, but the photons carrying the information are still only traveling at the speed of light. I suppose if you had a way of preserving the paired photons until one of them reached Mars, then you might use the one on earth for instantaneous communication.
That might be possible someday, but with relativistic effects we will also be able to communicate with both the past and future. A quantum computer could tell us the answer before even ask it. There is some evidence that female brains can already do this.