[Havoc]

The whole bubbles and pulsing doesn’t sound particularly silent

[Turing_Machine]

Yeah, if I'm understanding what's going on here, it's going to be noisy as hell.

Cavitation noise isn't the only factor making a submarine detectable, but it's definitely high on the list. It's been used to detect submarines since WWII or thereabouts.

[LargoLasskhyfv]

Maybe it's a variation of a https://en.wikipedia.org/wiki/Pump-jet somehow using lasers instead of impellers to heat the inflow all internally and dampened/mostly silenced to the outside? Also enabling https://en.wikipedia.org/wiki/Supercavitation by emitting some of the 'exhaust' from the tip of the bow?

[Eddy_Viscosity2]

It says its using lasers to vaporize seawater all around the submarine which would create a submarine sized super cavity which would have very very low resistance. The problem is what happens when the bubbles collapse. That's what causes the cavitation noise, its when the bubbles collapse. They can do so with such force that they can pull metal out of nearby surfaces.

[LargoLasskhyfv]

Yah. Meanwhile elsewhere people have torn apart the news. Seems that it is just a concept, no test in reality at all, not even parts of it in a lab. Maybe late april joke?

[Eddy_Viscosity2]

It felt like I was reading from 'three body problem'. I wonder if the author was inspired by the sci fi there.