5 ms·

What's faster than satellite communication? Neutrinos baby Not even sure if that's worth doing, either create/emit or use encode data into them as they fly by

• queuebert 2y ago
  Neutrinos can go straight through the Earth, yes, but since they have mass their velocity is less than c.
  • mr_toad 2y ago
    It’s very close to c though, close enough that it beats sending a signal around the Earth. The drawback is the impractical size and cost of a receiver.
    • cozzyd 2y ago
      Come on, we gotta convince the finance bros to find building better neutrino beams and detectors.
      • e3bc54b2 2y ago
        HFT peeps are Comfortable spending millions on custom high speed undersea cables to save few ms o'er request. How about saving few hundred ms across the earth?
• shagie 2y ago
  That's covered in RFC 1217. https://www.rfc-editor.org/rfc/rfc1217.html https://www.rfc-editor.org/rfc/rfc1217.html Its in section 4: Jam-Resistant Underwater Communication
• PaulHoule 2y ago
  Would have really been faster if this result was true https://en.wikipedia.org/wiki/2011_OPERA_faster-than-light_neutrino_anomaly https://en.wikipedia.org/wiki/2011_OPERA_faster-than-light_n... which was something that would have happened in https://en.wikipedia.org/wiki/Steins;Gate https://en.wikipedia.org/wiki/Steins;Gate Funny the idea that the neutrino might be a tachyon never seems to go away. The best fit of OPERA results is within error bars of the speed of light but towards the superluminal side. Superluminal neutrinos of the energy they were generating with the kind of mass we expect wouldn't be going measurably faster than the speed of light. I visited the site of this experiment https://permalink.lanl.gov/object/tr?what=info:lanl-repo/lareport/LA-UR-97-2534-07 https://permalink.lanl.gov/object/tr?what=info:lanl-repo/lar... where the best fit for the squared mass was just a tiny bit negative but within bounds of zero. There is the classic 1985 Chodos paper https://www.academia.edu/27606971/The_neutrino_as_a_tachyon?uc-sb-sw=11109336 https://www.academia.edu/27606971/The_neutrino_as_a_tachyon?... and people still keep writing papers about it https://www.mdpi.com/2073-8994/14/6/1172 https://www.mdpi.com/2073-8994/14/6/1172 somebody is going to have to measure a positive mass squared to really put a stake in its heart.
  • queuebert 2y ago
    It's worth noting that we received the neutrinos from Supernova 1987a before the photons. We think that's because the photons have a difficult time escaping the ejecta cloud, while neutrinos stream away freely, but who knows ...
    • PaulHoule 2y ago
      Oddly another detector caught a burst of low energy neutrinos that came a few hours before the burst that everyone accepts was from 1987a https://www.sciencedirect.com/science/article/pii/S0927650512001843 https://www.sciencedirect.com/science/article/pii/S092765051... Low energy tachyons would go a little faster, but you've got the additional problem of explaining why neutrinos got emitted in a spectral line.
      • queuebert 2y ago
        That is weird. Is the conventional explanation a flash from one of the last fusion stages right before core collapse?
        • PaulHoule 2y ago
          The core collapse itself produces most of the neutrinos. All of these protons are squeezed together with electrons which produces neutrons and neutrinos.
          • queuebert 2y ago
            I was referring to the earlier monoenergetic flash. Yes, most should be produced through electron capture in the collapse, but for earlier event to be monoenergetic suggests a specific nuclear process to me.
• hammock 2y ago
  We already do, so the conspiracy theory goes. In Antarctica