- Feb 29, 2004
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Ok. Typical scenario. You have 2 entangled particles, let's say A and A'. You observe/determine the spin state of A, that means the spin state of A' is now determined, instantly. This is something that is already being observed experimentally; don't ask me how, or what kind of detectors are involved, or how the particles are kept isolated from their surroundings during their initial travel/separation time; I don't know. Books that I have read suggest that this is not really communication because you can't know one way or the other how they will turn out; only that they will turn out oppositely. So if A is up, then A' is down; and if A is down, then A' is up; but you can't know in advance whether A will end up up or down. Fine.
However, I view the very state change at a given moment as effective communication, especially when multiple entangled pairs are used. Say we now have pairs A and A', and B and B'. Observe/determine state of A and then B => state of A' and then B' becomes determined. Or vice-versa. So a very simple "yes" or "no" can already be communicated: A then B = yes, B then A = no.
But now what if you have arbitrary numbers of entangled pairs? You can communicate arbitrary amounts of data.
Even better, you don't have to have arbitrary numbers; you can get by with just 2 entangled pairs. Let's assume that our spin-change detector has a time-resolution of 1 second. So A, (1 second), B = 1. A, (2 seconds), B = 2. And so on. You can do this to encode any number, and as we know from information theory, every number represents a unique communication/idea/datum. Any computer program ever written can be represented by a single number. Of course, if the time-resolution is 1 second, we will be waiting a long time for those longer messages. But what if the time-resolution is much greater? Say, a microsecond (which I believe we're already capable of, given that we're running tests showing that this stuff is happening faster than the speed of light, and the timing has to be very precise for stuff like that)? Then we've got communications going at over 100 kBps, if my back-of-the-napkin math is correct. Assuming efficient coding and a limited, pre-determined vocabulary, a lot of ideas could be communicated in a second or two -- over arbitrary distances.
Am I missing something here? Everything that I've read pooh-poohs the idea of FTL communication via quantum entanglement/non-locality based on an argument that only discusses a single pair of entangled particles.
However, I view the very state change at a given moment as effective communication, especially when multiple entangled pairs are used. Say we now have pairs A and A', and B and B'. Observe/determine state of A and then B => state of A' and then B' becomes determined. Or vice-versa. So a very simple "yes" or "no" can already be communicated: A then B = yes, B then A = no.
But now what if you have arbitrary numbers of entangled pairs? You can communicate arbitrary amounts of data.
Even better, you don't have to have arbitrary numbers; you can get by with just 2 entangled pairs. Let's assume that our spin-change detector has a time-resolution of 1 second. So A, (1 second), B = 1. A, (2 seconds), B = 2. And so on. You can do this to encode any number, and as we know from information theory, every number represents a unique communication/idea/datum. Any computer program ever written can be represented by a single number. Of course, if the time-resolution is 1 second, we will be waiting a long time for those longer messages. But what if the time-resolution is much greater? Say, a microsecond (which I believe we're already capable of, given that we're running tests showing that this stuff is happening faster than the speed of light, and the timing has to be very precise for stuff like that)? Then we've got communications going at over 100 kBps, if my back-of-the-napkin math is correct. Assuming efficient coding and a limited, pre-determined vocabulary, a lot of ideas could be communicated in a second or two -- over arbitrary distances.
Am I missing something here? Everything that I've read pooh-poohs the idea of FTL communication via quantum entanglement/non-locality based on an argument that only discusses a single pair of entangled particles.