Pusey–Barrett–Rudolph theorem

The Pusey–Barrett–Rudolph (PBR) theorem is a no-go theorem in quantum foundations due to Matthew Pusey, Jonathan Barrett, and Terry Rudolph (for whom the theorem is named) in 2012. It has particular significance for how one may interpret the nature of the quantum state.

Source: Wikipedia — Pusey–Barrett–Rudolph theorem (CC BY-SA 4.0)