QBism, the Perimeter of Quantum Bayesianism · HackerPapers discussions

QBism, the Perimeter of Quantum Bayesianism — mentioned by themgt

Sun, 25 Oct 2026 13:39:55 GMT

But that just kicks the can. The modern record for a matter-wave superposition stands at a nanoparticle composed of roughly 7,000 sodium atoms (about 8 nanometers wide), achieving a massive "Schrödinger's cat" state at the scale of a small virus. So then particles don't exist, and viruses also don't exist? Is "reality" just a dynamic pattern that doesn't exist in the naive sense? As astute stoics we should not worry ourselves with such matters, "shut up and calculate"? There is something about quantum theory that is different in character from any physical theory posed before. To put a finger…

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QBism, the Perimeter of Quantum Bayesianism — HN submission

Thu, 23 Feb 2023 03:47:37 GMT

QBism, the Perimeter of Quantum Bayesianism

1 point; 0 discussion replies on HN. Paper and source history. A submission is not an endorsement.

QBism, the Perimeter of Quantum Bayesianism — mentioned by n4r9

Sat, 06 Jul 2019 23:33:18 GMT

Ah, I think I have a clearer understanding of what you're getting at now. I think your first objection is to the idea that nothing physical is actually happening during the collapse of the wave function. On this I completely agree and I apologise for having used very poor phrasing. When I said "merely a reflection" I didn't intend to mean that nothing physical is occurring. I meant that (according to QBism) there is not a real objective quantum system whose real objective quantum state irreversibly collapses into a single real objective pure state. Rather, an agent has a physical interaction…

Paper and discussion history. A mention is not an endorsement.

QBism, the Perimeter of Quantum Bayesianism — mentioned by n4r9

Tue, 05 Jun 2018 08:56:31 GMT

There's a third option, which historically arose out of the issues you describe with your first approach. This is to deny that quantum theory is a description of an objective, observer-independent reality. Rather it is a kind of "personal rule book" which informs an agent's beliefs about future interactions with the world. https://en.wikipedia.org/wiki/Quantum_Bayesianism https://arxiv.org/pdf/1003.5209.pdf

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