Quantum Camera Capable of Snapping Photos of 'Ghosts'
mnn.com
mnn.com
> In the new experiment, the physicists entangled photons in two separate laser beams with different wavelengths, and hence color: one yellow and one red.
> The team passed the red light beam through etched stencils and into cutouts of tiny cats and a trident [...]. The yellow beam traveled on a separate line, never hitting the objects. [...]
> After the red light passed by the objects, the physicists ran it together with the yellow laser beam at both parallel and right angles.
> The red light was then discarded, and the yellow light headed for a camera. There, that yellow light revealed a picture of the object. And a negative of the picture emerged from the light that had interfered at a right angle.
This is a very important detail. After the red light hits the target, it interacts with the yellow light. So it's not unbelievable that the yellow light may form some kind of image.
In the mnn article, it looks like the red and yellow laser never meet again, so the information about the target is transmitted in some spooky way.