Decoherence and ‘Quantum Darwinism’: not a cure for Schrodinger’s Cat.

It is widely thought that decoherence solves the measurement problem in a Many Worlds approach to quantum theory. In fact, this is claimed to be settled science in many internet sites with information on quantum theory. But this is not correct. Those 'Quantum Darwinism' arguments depend on smuggling in a hidden premise that is inconsistent … Continue reading Decoherence and ‘Quantum Darwinism’: not a cure for Schrodinger’s Cat.

Advertisements

Why quantum theory isn’t a shell game (PBR Theorem for the layperson)

The following is an excerpt from an Appendix of my forthcoming book, Understanding Our Unseen Reality: Resolving Quantum Riddles (Imperial College Press). In the book, quantum states (‘kets’) are represented by triangles. The proof of Pusey, Barrett and Rudolph demonstrates that quantum states cannot be taken as approximate descriptions of underlying, hidden properties. To present … Continue reading Why quantum theory isn’t a shell game (PBR Theorem for the layperson)