Thursday, November 13, 2014

Interstellar Communications Through Quantum Entanglement

Everybody has seen the news about Quantum Entanglement. They are not exactly new news but just revived ones. For some of us though, they are. And people of the whole planet reading about can brainstorm and come up with ideas.

What came to mind is the possibility of interstellar communications. And not only in the future but probably since the past.

It has already been stated that "It thus appears that one particle of an entangled pair "knows" what measurement has been performed on the other, and with what outcome, even though there is no known means for such information to be communicated between the particles, which at the time of measurement may be separated by arbitrarily large distances."

Ok. If photons can spontaneously split into entangled pairs,  let's say that a number of photons arriving to Earth from a certain star can be entangled with photons arriving from the same star on a different planet far away.

All you need is a way to separate those from photons coming from all directions, filter them from non entangled ones and a way to measure them.

The communicating through measuring of the entangled photons is instant regardless of distance. However, in practice it can be real time duplex only if the two planets are at similar distances from the place of the splitting of the photons, because those need time to travel, at the speed of... light, of course. Communication can occur only when those photons are still... alive. The place in space where such communication can practically occur is on the surface of a sphere like in the picture in this article.

And for planets in motion, that can happen only for brief periods of time, at certain times.

Or maybe there is a way to trap entangled photons during those brief moments and use them... later!

Needles to say, they can be already devices on Earth that just do that, for immemorable times.

Maybe the human body has specialized areas that can detect and measure those.