The Copenhagen Interpretation
So sometimes a particle acts like a particle and other times it acts like a wave. So which is it? According to Niels Bohr, who worked in Copenhagen when he presented what is now known as the Copenhagen interpretation of quantum theory, the particle is what you measure it to be. When it looks like a particle, it is a particle. When it looks like a wave, it is a wave. Furthermore, it is meaningless to ascribe any properties or even existence to anything that has not been measured. Bohr is basically saying that nothing is real unless it is observed.
It just means that the particles do not communicate by any means we know about. All we know is that every particle knows what every other particle it has ever interacted with is doing.
NOTE: to actually perform this exact experiment would take detectors more advanced then any on earth at this time.
On the contrary the neutron experiment showed that photons can repel neutrons.
When we measure the movement of an object by emitting light towards it and measuring the resultant light reflected back to us, we are interfering physically with the direction and speed of the observed object. If the object is large, the effect of the interference is small. At a sub atomic level, the interference is greater and can become sufficient to negate the observed items motion entirely.
Quantum theory is wrong.
Particles do not retain "information", don't have "knowledge".
It is not that the act of observation that alters reality. In fact the physical nature of the "observation" small though it may be is sufficient to alter the metrics of sub atomic particles.