> I'm not a quantum physicist, but it seems like theoreticians always resolve to adding more dimensions when they can't solve a problem. IANAP. It doesn't soun

> I'm not a quantum physicist, but it seems like theoreticians always resolve to adding more dimensions when they can't solve a problem. IANAP. It doesn't sound like string theory 2.0 to me; the dimension they added to accomodate their magical photon wasn't a new dimension of spacetime; it was a new dimension in the Hilbert space that they use describe the quantum state of the system. They explain that this is an "abstract space". I think the extra dimensions that ST requires are supposed to be actual dimensions of spacetime. I share the doubts of the poster upthread who notes that the photon appearing on the way to Andromeda has no past, so is paradoxical already. I didn't understand that bit.