I use mathematical jargon all the time, but I gotta admit, getting major Turbo Encabulator[0] vibes here :D

[0] https://www.youtube.com/watch?v=Ac7G7xOG2Ag

"Insiders" (ahem why does OP think this is interesting ) chip in on the following and others? They could also be standard, but I an likely much more wrong about how interesting they are?

1) frequency upconverted light with BBO generates photocurrents (But it doesn't seem like the measurement itself is "quantum-enhanced"? As I understand it the process generates entangled photon pairs?)

2)etching gold with very mild chemicals (KI would be a health supplement after your nuclear apocalypse. YBCO in your cup of phosphoric acid doesn't seem so bad either)

3) https://www.colorado.edu/conference/bss/media/4149