"a few billionths of a Kelvin below absolute zero"

[BlackCat]

Not much but :

For instance, Rosch and his colleagues have calculated that whereas clouds of atoms would normally be pulled downwards by gravity, if part of the cloud is at a negative absolute temperature, some atoms will move upwards, apparently defying gravity.

Gravships ?

Some tech explanation here, and the eggheads homesite here.

[Sava]

Either there is no absolute zero or they need to make a new scale.

[MichaeltheGreat]

Either there is no absolute zero or they need to make a new scale.

The existing scale works fine. Below absolute zero temperatures are strictly a quantum phenomena.

[KrazyHorse]

Thanks for sharing! Good share!

[Sava]

The existing scale works fine. Below absolute zero temperatures are strictly a quantum phenomena.

so is yourface

[Guynemer]

This makes less than no sense to me.

[dannubis]

Guynemer, levitator...

[Straybow]

Oh, goody, I can have a gravship, it just has to be really cold in there.