11–20 of 56 posts
So what's the meaning here? I've been reading similar (to a non quantum physicist) stories for years and RTFA. What will this change about my life?
If they manage to implement this shit, we'll be able to have FPS games hosted anywhere in the world!
So what's the meaning here? I've been reading similar (to a non quantum physicist) stories for years and RTFA. What will this change about my life?
If your transmission is based on quantum entangled photon states, it is physically impossible to eavesdrop without giving yourself away, since the act of eavesdropping 'collapses the quantum superposition' (like when you open the box with Schrodingers cat). They've actually already rolled out systems based on this technology in various places in the world, but there is a lot of work to improve bandwidth and so forth.
I won't say too much more as I'm well outside the field and will probably garble it.
So what's the meaning here? I've been reading similar (to a non quantum physicist) stories for years and RTFA. What will this change about my life?
Minimum round trip time between San Francisco and Tokyo is about 60ms due to the speed of light, which means in practice FPS games are unplayable across the ocean. If they manage to implement this shit, we'll be able to have FPS games hosted anywhere in the world!
Does this conflict with the notion of the speed of light being a universal maximum speed? If teleporting information causes bi-directional communication to be instant, aren't signals being propagated at faster than the speed of light?
If it doesn't mean information travelling instantaneously or faster than light, then did the reporter (or the scientist) put the word "teleport" in the title just so it's attention grabbing?!
Quantum teleportation, or entanglement-assisted teleportation, is a process by which a qubit (the basic unit of quantum information) can be transmitted exactly (in principle) from one location to another, without the qubit being transmitted through the intervening space. It is useful for quantum communication and computation. It does not transport the system itself, nor does it allow communication of information at superluminal (faster than light) speed. Neither does it concern rearranging the particles of a macroscopic object to copy the form of another object.
So what's the meaning here? I've been reading similar (to a non quantum physicist) stories for years and RTFA. What will this change about my life?
Minimum round trip time between San Francisco and Tokyo is about 60ms due to the speed of light, which means in practice FPS games are unplayable across the ocean. If they manage to implement this shit, we'll be able to have FPS games hosted anywhere in the world!
Does this conflict with the notion of the speed of light being a universal maximum speed? If teleporting information causes bi-directional communication to be instant, aren't signals being propagated at faster than the speed of light?
This doesn't affect how -classical- information is transmitted or make it any better. It makes -quantum- information transmission reliable, which is actually pretty significant. This should allow for quantum computers of larger sizes than the super-tiny ones that have been created so far to actually work.
http://en.wikipedia.org/wiki/No-teleportation_theorem (why it is difficult to transmit quantum information)
http://en.wikipedia.org/wiki/Quantum_teleportation (what is being done in this experiment) What the breakthrough is is a way to do quantum telportation reliably -and- quickly (which had both been done before)