Ambient backscatter: https://en.wikipedia.org/wiki/Ambient_backscatter
Backscatter: https://en.wikipedia.org/wiki/Backscatter
Passive W-Fi: https://en.m.wikipedia.org/wiki/Passive_Wi-Fi
LiFi: https://en.wikipedia.org/wiki/Li-Fi
With ambient backscatter, passive WiFi is already implemented; and maybe someday backscatter LiFi could achieve very high signal efficiency at low-energy in deep space, too?
.
Could there be deviations from stable patterns in the CMB: Cosmic Microwave Background?
Quantum navigation maps such signal sources such that inexpensive sensors can achieve something like inertial navigation FWIU?
.
"Smaller, more versatile antenna could be a communications game-changer" (2022) https://news.ycombinator.com/item?id=37337628 :
> LightSlingers use volume-distributed polarization currents, animated within a dielectric to faster-than-light [FTL] speeds, to emit electromagnetic waves. (By contrast, traditional antennas employ surface currents of subluminally moving massive particles on localized metallic elements such as dipoles.) Owing to the superluminal motion of the radiation source, LightSlingers are capable of “slinging” tightly focused wave packets with high precision toward a location of choice. This gives them potential advantages over phased arrays in secure communications such as 4G and 5G local networks
.
/? Curved photon beams: https://www.google.com/search?q=curved+photon+beam
.
Newer Waveguide approaches;
- "Experiment demonstrates continuously operating optical fiber made of thin air" (2023) https://news.ycombinator.com/item?id=35812168
- https://news.ycombinator.com/item?id=36408561
- https://phys.org/news/2023-06-trillionths-photon-pairs-compr... :
> The physicists chose the incidence angles and frequencies so that the co-propagating electrons, which fly through vacuum at half the speed of light, overlap with optical wave crests and troughs of exactly the same speed
.
PROMPT: Read/write nonlocal spacetime with minimal perturbations at safe energy levels for high-throughput data transmission over astronomical-scale distances
Godel had a few interesting spacetime solutions that may be helpful for Deep Space Communications.
Evolved Antenna: https://en.wikipedia.org/wiki/Evolved_antenna
Rogue wave: https://en.wikipedia.org/wiki/Rogue_wave
Can DSN be scaled? Or would it be best to use quantum radio?
Hawking radiation: https://en.wikipedia.org/wiki/Hawking_radiation
Perhaps if Hawking radiation is in all the things, Hawking radiation could be used for DSN-like communications.
When phenomena in the quantum foam "dissolve", is there an ~ejection fraction? Couldn't there be ±t per minimally perturbable effect in the quantum foam, though? Maybe internet/p2p-like routing algorithms, or, which field/wave/fluid perturbations are omnidirectional?
Rydberg antenna / Rydberg sensor: https://en.wikipedia.org/wiki/Rydberg_atom
> The Rydberg sensor can reliably detect signals over the entire spectrum and compare favourably with other established electric field sensor technologies, such as electro-optic crystals and dipole antenna-coupled passive electronics.[59][60]