Recent content by iste
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Graduate Understanding Barandes' microscopic theory of causality
From what I read, this paper seems to imply some serious ambiguities in Barandes' work about what indivisibility actually mean, and when you use the characterization the paper thinks is best, his definitions just don't add up. What is most salient to me is the suggestion that Barandes'...- iste
- Post #400
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
I feel like there can't be a fact of the matter if Barandes' formalism doesn't tell you how to construct trajectories. Saying they're discontinuous I think must come from an outside assumption. But I thino just because you cannot see a reason why trajectories wouldn't allow discontinuity isn't...- iste
- Post #399
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
No, all physically meaningful probabilities. If you have a probability describing a physical system that is not approximated frequentially when you repeat a scenario indefinitely, then that probability is wrong. Well it depends on your notion of causality or laws; but I am not proposing to...- iste
- Post #393
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
You might find this Curt Jaimungal episode interesting: Well I think all probabilities bottom-out this way. Probabilities just won't be veridical or even meaningful, at least for physical systems, if they don't match approximately what would happen if you repeated scenarios infinitely many...- iste
- Post #391
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
Yes, you could see laws like this; I would say that from the perspective of the omniscient observer, he could codify laws about all the trajectories he observes when he counts them and their objective frequencies. It seems to me that his description would be a more fundamental than the...- iste
- Post #386
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
No, my objection is not against randomness in general. The indivisible interpretation implies there are definite configurations for a particle at every time. If that is the case, there should be conditional probabilities that take a given particle from configurations at one time to...- iste
- Post #375
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
Yes, that's the paper. Sure, I think the stcohastic-quantum correspondence is a valid way to argue that the quantum state is not ontology. And yes I was frustrated during his Maudlin interview that mostly the last 15 minutes of a 3 hour conversation was when you actually had some interesting...- iste
- Post #373
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
This is just my thoughts on the new Barandes papers. Regarding Barandes' Pilot-Wave-As-Hidden-Markov-Models paper, I feel like Barandes' use of the phrase "hidden markov model" seems idiosyncratic. I then don't see the rhetorical pull of calling the wave-function a "hidden markov model" because...- iste
- Post #362
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
Just a thought: in his arxiv:2402 paper, it looks like Baranded implies that the subject systems (not measuring devices) do nonlocally causally influence each other, but he explains this away due to the initial interaction even though he cannot "plug it in" as a conditioning variable. I also...- iste
- Post #321
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
Signalling in terms of the evolution of particles' Markovian trajectories is the stochastic mechanical manifestation of Bohmian nonlocal influence. It is briefly mentioned the Nelsonian stochastic mechanics nonlocality and how Barandes avoids it in that clip Sambuco linked in post #298, soon...- iste
- Post #320
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
Its informative in one rather niche sense that he views his theory as a hidden-variable interpretation. The two major hiden variable theories I am aware of, Bohmian mechanics and the easily confused stochastic mechanics both violate his causal locality, or perhaps some close analog, so it is...- iste
- Post #308
- Forum: Quantum Interpretations and Foundations
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Graduate Understanding Barandes' microscopic theory of causality
New Barandes preprint on "The CHSH Game, Tsirelson's Bound, and Causal Locality" arXiv:2512.18105v1- iste
- Post #294
- Forum: Quantum Interpretations and Foundations
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Undergrad Valid local explanation of Bell violations? (Pegg et al., 1999; 2008)
Its not the quantum state at preparation but they are still evolving a quantum state backward in time from measurement. They are doing quantum theory backward-in-time. I have given various sources on this formulation in the original post. I mentioned in the previous post nd you'll find it in...- iste
- Post #36
- Forum: Quantum Interpretations and Foundations
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Undergrad Valid local explanation of Bell violations? (Pegg et al., 1999; 2008)
They are evolving a quantum state backward from the measurement. They are using quantum theory and just exploiting that it seems to work backward just as well as it works forward in time. The states using the backward evolution are just not necessarily the same as the ones forward in time, but...- iste
- Post #29
- Forum: Quantum Interpretations and Foundations
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Undergrad Valid local explanation of Bell violations? (Pegg et al., 1999; 2008)
I will give my take here on why it is not obvious that the backpropagation is "time-travel", connected to the fact that the quantum retrodiction is related to the normal forward-in-time usage by Bayes' rule. You can then infer the appropriate retrodictive probabilities using conventional...- iste
- Post #26
- Forum: Quantum Interpretations and Foundations