What my colleagues and I proposed is that this quantum superposition results from the relativity principle, which (again) ...

These tests aim to determine whether the superposition principle holds true for larger systems or if it breaks down, as suggested by spontaneous wave function collapse models. Recent studies have ...

That is, except for one big, neon-green brick in the uniform, rustic wall of physics—gravity ... mechanics is not defined by the superposition principle alone, but also requires the unitarity ...