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originally posted by: UnderKingsPeak
If even the most conservative estimates
about intelligent life in the universe are close
we are most certainly not alone.
"it may well be that neutrinos are considered by extraterrestrial civilizations to be a more advanced method of communication than radio waves."
The First Message Using a Neutrino Beam
Making this possible will be advances in our ability to detect neutrinos, and it’s clear how tricky this will be. The recent neutrino message at Fermilab, created by researchers from North Carolina State University and the University of Rochester, is a case in point. Fermilab’s NuMI beam (Neutrinos at the Main Injector) fired pulses at MINERvA, a 170-ton detector in a cavern some 100 meters underground. The team had encoded the word ‘neutrino’ into binary form, with the presence of a pulse standing for a ‘1’ and the absence of a pulse standing for a ‘0’.
3454 repeats of the 25-pulse message over a span of 142 minutes delivered the information, corresponding to a transmission rate of 0.1 bits per second with an error rate of 1 percent. Out of trillions of neutrinos, an average of just 0.81 neutrinos were detected for each pulse, but that was enough to deliver the message. Thus Fermilab’s NuMI neutrino beam and the MINERvA detector have demonstrated digital communications using neutrinos, pushing the signal through several hundred meters of rock. It’s also clear that neutrino communications are in their infancy.
Much discussion of SETI has been taken up with finding a suitable frequency for radio communication. Interesting arguments have been advanced for 21 centimeters, the water hole, and other wavelengths. It is hard to reason satisfactorily on this subject; only the detection of a signal will tell us whether or not we are right. Neutrino detection schemes, on the other hand, are broad band, that is, the apparatus is sensitive to neutrinos of a wide energy range.
The fact that neutrinos pass through the earth would also be an advantage, because detectors would be omnidirectional. Thus, the whole sky can be covered by a single detector. It is perhaps reasonable to search for messages from extraterrestrial civilizations by looking for the neutrinos they are transmitting, and then switch to electromagnetic means for further conversations.
For those that keep saying that because the universe is around 14 billion years old there should be all sorts of civilizations out there, need to put the brakes on and actually take a look at what was going on in the universe that far back.
In 1979, Pasachoff and Kutner calculated that a 1 trillion electron volt proton beam, located at the distance of Tau Ceti (11.88 light years), would need a detector ten times the mass of the Earth. It would be interesting to know how far this technology has advanced in reducing this calculated mass.
originally posted by: Triton1128
Couple things :
Einstein's theory of special relativity sets of the speed of light, 186,000 miles per second (300 million meters per second). ... The speed of light is constant, or so textbooks say. But some scientists are exploring the possibility that this cosmic speed limit changes, a consequence of the nature of the vacuum of space. (Remember, its a Theory)
Quantum teleportation :
Just 5 days ago .. reports by Chinese scientists that they had transmitted the quantum state of a photon on Earth, to another photon on a satellite in low Earth orbit, some 1,400 kilometers away.
Article : www.nature.com...
Its just a matter of time before communications has no delay. Instant information, received at the moment its sent. If that's the case, then we might soon have the ability to communicate across the cosmos without delay.
originally posted by: zeroPointOneQ
a reply to: Harte
That's what I heard as well. Even measurements would collapse the entire state of the entagled system.
Hurdles or boundries?