I’m away from computer so only skimmed the article until I noticed they use the ADG90x RF switch family.
IIRC that family has a single positive supply rail, and they make a nagative rail internally. The advantage is easy of implementation but you also inject some noise depending on switch position. Is this dealt with in the pub?
This is extremely strange. Shouldn't this be impossible by the second law of thermodynamics?
Receiving more energy when a resistor in thermal equilibrium is connected to an antenna seemingly implies that energy gets transferred from an antenna with a resistor to a an antenna without a resistor, even at thermal equilibrium.
Maybe we'll later find it's an experimental subtlety, like the faster than light neutrinos.
FWIW, the "Significance" blurb at the very top says as much:
> An interesting feature of the system is that all components of the system are at the same physical temperature, but it functions because they have different noise temperatures.
> the maximum achievable throughput is 26 bps at 1.5 m and goes down to 22 bps at 4.5 m.
And when there are more than one transmitters in real world conditions instead of anechoic chamber?
It's cool and all and if this work is for it's own sake, for the sake of research, no issues. But otherwise, I struggle to think of practical use cases. I grant that my imagination may be deficient.
I think someone from OpenAI said something like "air gapping AI can't (hypothetically) work because it will figure out a way to basically morse code across the airgap". (I think this was in response to people calling them out for not airgapping)
> "air gapping AI can't (hypothetically) work because it will figure out a way to basically morse code across the airgap"
All things well-known for good two decades and written about by x-risk/LessWrong crowd, but to date continued to be dismissed as lunacy.
On one hand it's great to see it demonstrated in practice in concrete terms, on the other hand it's sad we have to basically make the mistakes ourselves, with live and close-to-dangerous systems, because we can't believe the obvious warnings.
IIRC that family has a single positive supply rail, and they make a nagative rail internally. The advantage is easy of implementation but you also inject some noise depending on switch position. Is this dealt with in the pub?
Receiving more energy when a resistor in thermal equilibrium is connected to an antenna seemingly implies that energy gets transferred from an antenna with a resistor to a an antenna without a resistor, even at thermal equilibrium.
Maybe we'll later find it's an experimental subtlety, like the faster than light neutrinos.
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Basically they are misleading when they say "thermal equilibrium", same physical temperature does not imply thermal equilibrium.
> An interesting feature of the system is that all components of the system are at the same physical temperature, but it functions because they have different noise temperatures.
(I assume it's not AI-generated.)
And when there are more than one transmitters in real world conditions instead of anechoic chamber?
It's cool and all and if this work is for it's own sake, for the sake of research, no issues. But otherwise, I struggle to think of practical use cases. I grant that my imagination may be deficient.
I guess your not on Twitter. It's not a coincidence this research paper from 2022 got posted today.
All things well-known for good two decades and written about by x-risk/LessWrong crowd, but to date continued to be dismissed as lunacy.
On one hand it's great to see it demonstrated in practice in concrete terms, on the other hand it's sad we have to basically make the mistakes ourselves, with live and close-to-dangerous systems, because we can't believe the obvious warnings.
https://www.nsa.gov/portals/75/documents/news-features/decla...
the x-risk/LessWrong crowd aren't adding anything to the conversation that seriously people haven't already considered.
(I am floored that this works. This is amazing.)