Minority interpretations of quantum mechanics

Quantum mechanics

Theoretical physics

Interpretation (philosophy)

Quantum process

Computer science

Relational quantum mechanics

De Broglie–Bohm theory

Classical mechanics

Physics

Quantum dynamics

Interpretations of quantum mechanics

Quantum

Consistent histories

Programming language

Theory of relativity

Nature Communications

We discuss the no-go theorem of Frauchiger and Renner based on an "extended Wigner's friend" thought experiment which is supposed to show that any single-world interpretation of quantum mechanics leads to inconsistent predictions if it is applicable on all scales. We show that no such inconsistency occurs if one considers a complete description of the physical situation. We then discuss implications of the thought experiment that have not been clearly addressed in the original paper, including a tension between relativity and nonlocal effects predicted by quantum mechanics. Our discussion applies in particular to Bohmian mechanics.

Quantum theory cannot consistently describe the use of itself