Dark energy chameleon force experiment rules out some dark energy possibilities

[swansont]

Dark energy ‘chameleon trap’ wins £100,000 prize for Nottingham scientist

Quote

 

The setup involved dropping ultra-cold atoms into a bowling-ball sized vacuum chamber containing a lump of aluminium. If a chameleon force existed, it should have a higher value in the empty space and be “hidden” close to the heavy lump of metal.

…

Unfortunately, no mysterious forces were uncovered, but the experiment was able to squeeze down the possible values that a chameleon force could take into a small window