Can liquid helium conduct heat infinitely fast?

[YoungPhysicist]

Can liquid helium is superfluidity state conduct heat infinitely fast?

I thought I have seen this is a paper somewhere a long time ago, but now I am not sure about that.

 

[hilbert2]

You can't have any causal signal propagate faster than speed of light.

 

[YoungPhysicist]

You can't have any causal signal propagate faster than speed of light.

Yeah.That is exactly what I am confused about that article a long time ago.

 

[hilbert2]

The superfluid $^4 He$ is a really good thermal conductor, but the speed of conduction is still finite. Another remarkable property of it is that heat transfer can occur as heat waves ("second sound") in addition to ordinary thermal diffusion.