“Teleporting quantum information is now a practical reality,” asserts Deutsche Telekom. The firm’s T‑Labs used commercially available Qunnect hardware to demo quantum teleportation over 30km of live, commercial Berlin fiber, running alongside classical internet traffic. In an email to Tom’s Hardware, Deutsche Telekom’s PR folks said that Cisco also ran the same hardware and demo process to connect data centers in NYC.
Bit disingenuous to talk about teleporting things along a fiber line…
Also shows a fundamental misunderstanding of how quantum entanglement works…
But it’s actually pretty huge that they’re able to do this.
As someone who also doesn’t fully understand quantum entanglement… is it that when two particles are entangled and far apart, when we observe them they will always be in the same state? Is there any way to manipulate that state? If so, it seems like it would be pretty straight forward to use it for faster than light communications.
The two particles are in different but directly related states. For example in some circumstances with two entangled photons, it will necessarily be the case that one photon has horizontal polarisation and the other vertical polarisation. The two will never have the same polarisation.
You can’t know which photon is in which state without measuring one. The effect of taking the measurement travels faster than the speed of light. Measurement is not manipulating though; you can’t say “I want this photon to be measured as vertically polarised”, you can only ask “what is the polarisation of this photon?”. So you can’t transmit information faster than light, unfortunately.