3 ms·

You really shouldn't be complaining about the speed of light. We're leaving a lot on the table by sending the data along the surface of earth instead of through

You really shouldn't be complaining about the speed of light. We're leaving a lot on the table by sending the data along the surface of earth instead of through it. With neutrino-based signalling you eliminate both the lower propagation speed and the suboptimal path.

RangerScience 9y ago
You should check out "spark gap radio". Basically, lightning causes ripples in the Earth's electromagnetic sphere. Those ripples travel across the surface of the earth at an apparent speed that's faster than light, because the actual path is through the earth.
sgift 9y ago
Has neutrino-based signalling been achieved or is it still a research topic? Last time I read about it it was more a case of "if we could do this it would be great, but we have no idea how to do it" and a quick Google search only brought a Forbes article from 2012 which had a similar sentiment.
- the8472 9y ago
  The OPERA experiment (of false FTL neutrino discovery fame) did create and detect neutrino pulses as part of their experimental setup. It's possible as far as the physics go but also impractical given the particle accelerator and detectors needed. And the post-processing the scientists had to do to tease out the timing information also would negate any latency advantage.
- dukwon 9y ago
  > Has neutrino-based signalling been achieved or is it still a research topic? An accelerator- or reactor-based neutrino experiment can detect whether the source is on or off, so in principle you can send binary information. This has been demonstrated using NuMI/MINERvA [1]. It's more of a novelty than anything practical. [1] https://arxiv.org/abs/1203.2847 https://arxiv.org/abs/1203.2847
xaedes 9y ago
Couldn't satellite distributed quantum entanglement also accomplish sending messages "through" the earth once properly set up? https://www.scientificamerican.com/article/china-shatters-ldquo-spooky-action-at-a-distance-rdquo-record-preps-for-quantum-internet/ https://www.scientificamerican.com/article/china-shatters-ld... http://spectrum.ieee.org/telecom/security/two-steps-closer-to-a-quantum-internet http://spectrum.ieee.org/telecom/security/two-steps-closer-t...
- the8472 9y ago
  No, that is a common misconception. Quantum teleportation always requires a classical communication side-channel and thus is bounded by the same speed limitations as the classical link.

RangerScience 9y ago

You should check out "spark gap radio". Basically, lightning causes ripples in the Earth's electromagnetic sphere. Those ripples travel across the surface of the earth at an apparent speed that's faster than light, because the actual path is through the earth.

sgift 9y ago

Has neutrino-based signalling been achieved or is it still a research topic? Last time I read about it it was more a case of "if we could do this it would be great, but we have no idea how to do it" and a quick Google search only brought a Forbes article from 2012 which had a similar sentiment.

the8472 9y ago
The OPERA experiment (of false FTL neutrino discovery fame) did create and detect neutrino pulses as part of their experimental setup. It's possible as far as the physics go but also impractical given the particle accelerator and detectors needed. And the post-processing the scientists had to do to tease out the timing information also would negate any latency advantage.
dukwon 9y ago
> Has neutrino-based signalling been achieved or is it still a research topic? An accelerator- or reactor-based neutrino experiment can detect whether the source is on or off, so in principle you can send binary information. This has been demonstrated using NuMI/MINERvA [1]. It's more of a novelty than anything practical. [1] https://arxiv.org/abs/1203.2847 https://arxiv.org/abs/1203.2847

xaedes 9y ago

Couldn't satellite distributed quantum entanglement also accomplish sending messages "through" the earth once properly set up? https://www.scientificamerican.com/article/china-shatters-ldquo-spooky-action-at-a-distance-rdquo-record-preps-for-quantum-internet/ https://www.scientificamerican.com/article/china-shatters-ld... http://spectrum.ieee.org/telecom/security/two-steps-closer-to-a-quantum-internet http://spectrum.ieee.org/telecom/security/two-steps-closer-t...

the8472 9y ago
No, that is a common misconception. Quantum teleportation always requires a classical communication side-channel and thus is bounded by the same speed limitations as the classical link.