So you use more than one entangled pair, or a continuous beam of entangled pairs. I only need to either collapse it or not to convey a one or a nought. If I can generate photons in a way where the unaffected properties are a known, then this is possible.
You cannot transfer a binary state (0 or 1) using a entangled pair. In quantum physics, measurement actually affect the objects and it's wave function.
Let's say there are 2 points A and B separated by a large distance(many light years) and you are trying to transfer a data from A to B using entangled pair,one in location A and other in location B.
A)What you can do,
Messure the state (observe) of entangled particle in location A and understand the state of other entangled particle in location B. Entanglement will be lost and wave function collapsed.
No valuable communication occurred.
B) what you cannot do,
If you want to pass a binary data like our digital communication, you need to 'Force' a state to the entangled particle and use the state of other particle to 'communicate' the information.
If you 'force' the particle in location A to a state,say 0 or 1, if the entanglement and wave function do not collapse, the state of particle in location B will be 1 or 0 (if the entangled lair relation is opposite like the polarised photon beam) we messure it and an information is communicated.
But, measurement will collapse the wave function and destroy entanglement. Ie, the moment you force particle A to a state, particle in location B is no longer an entangled pair and it behave irrespective of the state of particle A.
So, the observer in location B is looking at a particle that is acting independent of particle A,h is perception of measurement is random and hence no transfer of valuable data happened.
You can only clear the perception of uncertainty at the point B by transferring the information about the messuremnt at point A .There is no way you can pass the information '
about' the messuremet to point 'B' to clear the perception of uncertainty of measurement at location B, since such an information travel is limited by speed of light and hence the entire target of communiaction above speed of light failed.
Here is an article that explain the same situation elaborately. As I said earlier in the other thread, entangled pair experiments disproves locality, causality and relativity is still held.
Can Quantum Entanglement be used for Communication?