In the paper on Nature Physics, test of wave function collapse suggests gravity is not the answer.

Professor Angelo Bassi, alongside with other colleagues from Germany, Italy and Hungary, reach today, September 7, 2020, an important goal: the scientific journal Nature Physics publishes their paper “Underground test of gravity-related wave function collapse”.

The team has tested a theory that suggests gravity is the force behind
quantum collapse and has found no evidence to support it. In their paper the researchers describe underground experiments they conducted to test the impact of gravity on wave functions and what their work showed them.

Find the paper here.