Re: more teleportation

Damien Broderick (
Fri, 23 Oct 1998 17:05:08 +0000

At 12:33 AM 10/23/98 EDT, Curt wrote in response to my:

>> entanglement allows information to pass from one spacetime location to the
>> other *instantaneously*, faster than light. (Of course, you need to have
>> the prepared black box states already waiting, in advance, at either end

>No, it doesn't. Quantum entanglement can pass data, but it cannot pass
>information. Essentially you can only transfer uncrackably coded data
>that requires a key that must be sent relativistically.

Sorry, that was bundled in as part of the black box protocol. I assume (as previous discussions here have elaborated) that one-use pads/keys are sent along with the starship. But I still thought that the *return* encoded message would be instantaneous or spacelike. (I've been privileged to read part of a wonderful novel-in-progress by Charlie Stross that makes much play of this neat device.) Presumably, as Hal argues, that doesn't apply to the photon stream experiment mentioned in the CNN news report.

Damien Broderick