Re:Lasers boost space communications
by chrisfarms on Friday August 09, 2013 @07:34AM
(#6184981)
As I understand it, this is about "secure" communications and not some magical new way of information transmission. These "quantum communications" would still require a standard channel to communicate over.... which would likely be laser/radio as per normal.
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Do you need that for quantum entanglement communication, too?
From various discussions I've had with physicists on the matter I found the answer is yes.
My thoughts were summed up by having a device here on earth that is entangled with a device just above the surface of the sun. Now imagine the sun vanishes and the devices communicate this information over the entanglement, thus (to my mind) breaking the "light barrier" as we receive an 8 minute warning that the lights have gone out. I don't fully remember (or understand!) the answer I got, but it most definitely had a reliance upon a relativistic communication channel.
[also: what H3g3m0n said - entanglement is not about the transfer of information]