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I think the realist stance in its broadest sense has to do with getting rid of the observer in the description of "reality". That is, there must be a principle of relativity allowing all observers to …

There are very strong reasons to think that quantum superposition is a real phenomenon. What you are proposing is a brand of hidden variable theory, that is the idea that there exists some permanentl …

As @BobBee rightly points out, the point you make goes down to the whole mathematical structure of QM, and depends on what you mean by "real". Let's take "real" as labelling the intuitive meaning we …

Interpretations are here to make sense of the formalism of QM. Whatever computations and symbolic manipulations you need to do to prepare and analyse an actual experiment is QM. Whatever conceptual im …

The question is ill-posed in that it assumes that decoherence explains away the measurement problem, in a local manner. However decoherence only says that probability amplitude phases spread from a qu …

A 2013 poll involving 33 specialists at a quantum foundations meeting gave 42% for Copenhagen, 28% for information-based interpretations, 18% for Everett. Only 15% of the specialists thought that the …

The observer you model here is Wigner's friend as seen by Wigner: he may have observed something, but for Wigner he is now in a superposed state. You are right that entanglement is the proper relatio …

Consider two polarity-wise entangled photons A and B in an EPR experiment. The process of measuring the polarization of photon A by Alice is described by the decoherence of the 2-photons system with …

You can find a comprehensive review of decoherence and how it fits in the QM interpretation debate in Decoherence, the measurement problem, and interpretations of quantum mechanics (Schlosshauer, 2005 …

The OP seems to think that 'collapse' means that a wave function becomes a particle. What it means instead is that a quantum state (the 'wave function') may proposes the validity of several outcomes t …

Is quantum mechanics on a measurement level a deterministic theory or a probability theory? If we know the quantum state of a (ideal) closed system, then we have the probability distribution of …

I do not think that the quantum foundations question has been marginalised. It seems to be a very lively field. For example, there is an International Journal of Quantum Foundations on the web, with …

What the video analogy misses is that amplitudes are complex numbers, and that the quantum state is in no conceivable way similar to a classical physical object. To recover a classical physical quanti …

Locality does not have to be abandoned. But: QM shows that some experimental correlations have no causal explanations. What the experimental confirmations of the violation of Bell's inequalities sh …

The question 'where am I', taken at a microscopic level, is hardly meaningful. A human body, as a physical system, is overwhelmingly complex. It certainly cannot be described as a quantum system in an …