One small step for teleportation

If teleportation were to transport atoms of a human being and then regroup them, that would be akin to nanotechnology, right? So I guess by then everybody would be able to have whatever they want, something like the world of Manna situation like the webmaster of Howstuffworks wrote. Probably a 100 years from now we'll only be able to teleport information or data of a particular frequency or whatsnots. But I guess by then there would be enough xenotransplantation or medical advancements to ensure we live to see human teleportation. ^_^

Jam it back in, in the dark.

Originally Posted by ramoth

RacinReaver is right. The real use of this is to do quantum cryptography, not move things from place to place.

Quantum Cryptography? What's that?

There's nowhere I can't reach.

Originally Posted by Locke

My Dreams: Code making and breaking

Ah, thanks. Seems easy to understanding...

Originally Posted by FlamingScurve

Quantum cryptography relies on qubit representaion of information as opposed to traditional 1's and 0's. Not just that, but thanks to the Heisenberg Uncertainty Principle, you'll know right away if someone's messing with your communication. The reason quantum teleportation doesn't violate this principle is the "spooky action" of entanglement whereby the states of two particles are related despite their physical separation. Einstein resisted this notion because it wasn't in accordance to his idea that nothing can exceed the speed of light , not even gravity. But with entanglement, things happen seemingly instantaneously. Crazy shit.

... or maybe not so easy to understand. Hmmm... so qubit is stuff at a molecular level? I though Heisenberg's Uncertainty Principle could only be applied to objects in motion and its supposed to say that one cannot measure accurately the momentum of a moving object or something along that line? How does the Heisenberg Uncertainty Principle relate to telecommunications (or communications in this case as you've mentioned)?

This thing is sticky, and I don't like it. I don't appreciate it.

Originally Posted by FlamingScurve

A subatomic particle might exist in two physical states with different energies. The probability of each outcome is described in a wavefunction that fluctuates over time and space. So in a sense there are intermediate states.

HUP states that the uncertainties in measurements of position and momentum for a given particle are inversely proportional (meaning that to know one accurately decreases the precision of the other). It's as if there's a collapse whenever you try to observe something. Take Schrödinger's cat... a cat is placed in a sealed box connected to a contraption designed to release a deadly poison with a 50/50 chance. As far as you know the cat is either dead or alive which is kind of like envisioning it as half dead and half alive at the same time (an intermediate state). As soon as you open the box, though, your vision collapses back into hard reality.

Add entanglement to the equation and you get a much higher level of privacy than you would given present-day cryptography. The way it works is that b/c of entanglement (via photons for instance), a message can be encoded in qubits and the recipient will receive a virtual copy of it with very little error. If a spy tries to decipher it, the error will increase and he will be detected. The information actually protects itself but feedback is necessary to confirm that no eavesdropping ocurred.

With teleportation, matter is encoded rather than messages. The orginal macromolecular object doesn't move in the process. Also, they have it at a fidelity of only 0.6, so it's far from perfect.

Hmmm... I don't get everything you said but yeah, I do have a better idea about HUP and all that jazz now. I like the idea of information protecting itself via proton transmission.

I am a dolphin, do you want me on your body?