Can quantum theory provide examples of metaphysical indeterminacy, indeterminacy that obtains in the world itself, independently of how one represents the world in language or thought? We provide a positive answer assuming just one constraint of orthodox quantum theory: the eigenstate-eigenvalue link. Our account adds a modal condition to preclude spurious indeterminacy in the presence of superselection sectors. No other extant account of metaphysical indeterminacy in quantum theory meets these demands.
Bibliographical notePublisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Nature B.V.
- Eigenstate-eigenvalue link
- Quantum logic