Thursday, May 14, 2009

Teleportation Progress

You heard that right. And it is not tinfoil hat stuff. It is from reputable scientists.

It makes intuitive sense that if superconductors can carry currents with zero resistance, then superconducting light emitting diodes might do their stuff with equally amazing efficiency.

But superconducting LEDs are not only bright, they are brighter than anyone can explain, even after taking superconductivity into account. Now a team of Japanese theorists seems to have figured out the puzzle.
What does this have to do with teleportation?
This is exciting not just because superconducting LEDs will be bright but because Cooper pairs can also produce entangled pairs of photons. That raises the prospect of intense sources of entangled pairs, the likes of which physicists have not yet seen. And that could be hugely useful for everything from quantum communication to quantum teleportation.
That is still a long long ways from a Star Trek Transporter Room. But it is definitely a step in that direction.

For those of you interested in some of the more technical details and a nice graphic RTWT.

Cross Posted at Classical Values


Christophe said...

How exactly would the ability to copy part of a single electron's state allow one to teleport ?

Humans are not defined by the "state" of their compositing particles, but by the layout of said particles in relation to one another. Nerve signals are not defined by, say, the spin of electrons on your nerves but by the balance between kalium inside and outside of the conducting channel in the axons of your ocular nerves.

If you wanted to recreate a human at another location the challenge would be creating that same balance of kalium at the same locaton inside the axon that's connected to the same point as the original, if the spin of electrons is radically different, no-one cares, and it won't change the signal in the least.

This doesn't solve any problem whatsoever related to teleportation. It's only useful in certain specific kinds of experiments, most related to quantum computers.

Snake Oil Baron said...

I don't like the term "teleportation" in terms of teleporting a quantum state either but being able to generate entangled pairs of photons in large numbers could be rather useful. I suspect that many technological applications and scientific discoveries tend to be made after a phenomenon becomes easier to play with rather than just when it is discovered.