5 ms·
Yes again it seems like one of those 'theoretically possible but never seen in a lab' kind of requirements, just like negative energy. The PBS spacetime video
by LegitShady 5y ago
Yes again it seems like one of those 'theoretically possible but never seen in a lab' kind of requirements, just like negative energy.
The PBS spacetime video mentions you can 'do away' with the negative energy requirements at quantum scales, but those aren't really productive scales for useful space flight. Maybe for very tiny micro exploring robots? I'm not sure how such a device would usefully communicate with us though.
- eightails 5y agoI suppose an optimist would say that success, even at a tiny scale, would be a step in the right direction. But you're right, it could well be possible that the effect doesn't scale up. I think gram-scale probes are definitely being considered -- though not with Alcubierre drives obviously lol. Breakthrough Starshot think they can transmit back from Alpha Centauri at 2.6-15 baud per watt by using their light sail as a laser reflector [0]. Pretty crazy. [0] https://en.wikipedia.org/wiki/Breakthrough_Starshot#Laser_data_transmitter https://en.wikipedia.org/wiki/Breakthrough_Starshot#Laser_da...
- klyrs 5y agoCynical prediction: a nano-scale implementation could be a step towards a cable that can transmit signals faster than light... which would only be useful for HFT
- dotancohen 5y agoMake the trade based on future events that have already occurred. Interesting.
- AnIdiotOnTheNet 5y agoBasic loop: Price of X rises to Y at time T2, time-traveling trade packet is transmitted to T0, past-X is purchased at price W increasing demand of X and therefore increasing price to Z at T1. If T1 == T2 and Z == Y: the loop is stable. If T1 > T2 and Z >= Y: the loop is stable and not paradoxical. Every other option produces interesting results depending on the trading algorithm. Hypothesis: all unstable loop scenarios will converge on Z == Y == W, negating the sending of the signal altogether. Or from another perspective, the superposition-timelines where Z == Y == W does not occur destructively interfere with each other.
- Dylan16807 5y agoWhat, you don't want the ultimate ping in quake?
- klyrs 5y agoNah, I play turn-based roguelikes.
- RantyDave 5y agoI have a drunken plan involving sending neutrinos through the earth as a form of communication. Friends inform me that it has only three problems: producing the neutrinos; modulating the signal; and detecting it at the other end. I shall continue pottering.
- sterlind 5y agoAtomic bombs produce large bursts of neutrinos, which should be sufficient for the Super-Kamiokande detector in Japan. Amplitude modulation is possible through Dial-a-Yield and MIRV warheads can convey multiple bytes. Environmental impact may rival Bitcoin though..
- eesmith 5y agoHow much earth? Quoting https://www.worldscientific.com/doi/abs/10.1142/S0217732312500770 https://www.worldscientific.com/doi/abs/10.1142/S02177323125... from 2012 > We report on the performance of a low-rate communications link established using the NuMI beam line and the MINERvA detector at Fermilab. The link achieved a decoded data rate of 0.1 bits/sec with a bit error rate of 1% over a distance of 1.035 km, including 240 m of earth. https://arxiv.org/pdf/1601.05022.pdf https://arxiv.org/pdf/1601.05022.pdf from 2016 upped that to 810 km.
- qubex 5y agoThat’s surprisingly similar to my build-a-laser-to-traverse-the-core-and-then-beam-financial-data-through-it. Current state of research: my remote cousins in New Zealand and I have made a “planet sandwich” by laying bread on the floor of our antipodal dwellings.
- ridgeguy 5y agoNuclear reactors produce neutrinos and they can be detected [1]. For modulation, maybe vary the reactor power output (low bit rate, to be sure). People have explored neutrinos for communication with submerged submarines [2]. [1] https://en.wikipedia.org/wiki/Neutrino https://en.wikipedia.org/wiki/Neutrino [2] http://www.physics.ucla.edu/~hauser/neutrino_communication_paper/siljah_mod.htm http://www.physics.ucla.edu/~hauser/neutrino_communication_p...
- XorNot 5y agoThere's nothing which specifically stops you from having wormholes that don't violate relativity but do allow you to bypass annoying things like solid matter, but stabilizing them is something you also need negative energy to do. Replacing all radio communications with point to point lasers via wormhole-on-a-chip devices would be a heck of a communications revolution (probably also an answer to the Fermi paradox).
- lvncelot 5y ago> probably also an answer to the Fermi paradox I'm curious, why is that? Because the way I understood the Fermi paradox was that highly advanced civilizations should be visible from their energy requirements alone (e.g. via Dyson Swarms), not specifically in the way they communicate.
- XorNot 5y agoRadio waves wise, it would explain why SETI hear's nothing: the radio age would have lasted about 100 years before vanishing completely.
- LegitShady 5y agoI don't think it would stop radio receivers from existing especially for astronomy.
- AnIdiotOnTheNet 5y agoDepends on how easy it is to project a wormhole endpoint elsewhere in the universe. If it can be done at >= C then sensitive radio receivers don't have much value.
- TechBro8615 5y agoThe assumption that ET communicates via radio waves has always seemed unusually anthropocentric compared to the rest of SETI attitudes. If it’s not sending lasers through wormholes, it will be something else – but it seems the height of arrogance to assume that an advanced civilization would communicate via radio waves just due to our own familiarity with them. You don’t see this elsewhere – SETI is always keen to downplay “little gray men” (they might not even take physical form! Maybe we can’t conceive of them!) or “carbon based lifeforms” (maybe they’re made of silica!). But for some reason there’s less questioning of any assumptions about their communications media. I wonder if this is due to SETI betting the bank on radio waves.
- GordonS 5y agoReminds me of the "portals" (quantum spacial entanglement devices) in Peter F Hamilton's Salvation Sequence, which as well as people, vehicles and equipment, are used for electrical and communications cables.
- beambot 5y ago> 'theoretically possible but never seen in a lab' Not unlike gravitational waves and the Higgs Boson up until relatively recently...