Help me understand indeterminism in standard quantum mechanics

[RUTA]

Does QBism make any sense? For me it is not so different from sollipsism. If there is an old discussion about it that could read on it?

Some in the quantum reconstruction program have aligned themselves with QBism as explained in these two papers:

Berghofer, P.: Defending the quantum reconstruction program. European Journal for Philosophy of Science 14, 47 (2024). https://link.springer.com/article/10.1007/s13194-024-00608-2

Berghofer, P.: Quantum Reconstructions as Stepping Stones Toward ψ-Doxastic Interpretations? Foundations of Physics 54, 46 (2024). https://link.springer.com/article/10.1007/s10701-024-00778-2

 

[Sambuco]

Does QBism make any sense? For me it is not so different from sollipsism. If there is an old discussion about it that could read on it?

That's the most common criticism, but I think QBism is somewhat more complex. In short, it doesn't deny the possible existence of a physical world beyond our experience, but rather argues that QM only addresses the latter, not the former.

An excerpt from the paper arxiv:2108.13977 by Jacques Pienaar:

"...QBism holds the door open to the possibility of an ‘ontological substrate’ that might exist without agents or probabilities. What is the nature of this ontological substrate? Although the answer is an active topic of debate among QBists and philosophers, one thing is certain: the ontological substrate of QBism cannot be of a purely ‘mechanical’ or ‘physical’ nature. The reason is simple: since QBism takes measurement outcomes to be experiences of agents, what QBism’s ontology seeks to explain is not just how ‘physical phenomena’ arise, but rather, how physical phenomena co-arise together with agents’ experiences of them."

Lucas.