Recent content by iste

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...

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...

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...

New Barandes preprint on "The CHSH Game, Tsirelson's Bound, and Causal Locality" arXiv:2512.18105v1

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...

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...

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...

I don't think so. Its related to Bayes' theorem about probabilities so I can't see this as making any presumption about determinism. As far as I can tell, the only retrodictive boundary required in these entanglement experiments in the conte t of the retrodiction as formulated in the papers is...

If it relies on information going backward-in-time, it doesn't rely on the other spatially separated measurement in a manner which is not mediated by the source. When I say local, I just mean about whether it is in conflict with relativity in the sense of requiring faster than light influence...

The description used in the papers is done exclusively with quantum theory, so I think what it comes down to is whether backward propagation is non-local. I think at least from the perspective of relativity, it is local. Local in some deeper sense depends on whether this backpropagation is...

Maybe, but I think that if this retrodiction is problematic, you have to ask why it seems to exist as an option in quantum theory in the first place that can be used in various applications as described in the papers of the original post. If they both to some extent already seems to exist in the...

I think it does though because the explanation only relies on a random measurement outcome and what that retrodicts backward-in-time in a manner which only really depends on that outcome. Well if Alice's photon is not telling Bob's photon what to do across space instantaneously, but instead...

Just realized that the first link I gave is not obviously accssible. One of these links has a straightforward pdf link. Section 4 has the relevant description which is more or less the same as the content in the researchgate link earlier...

The papers infer the correct Bell correlation in a manner that looks local, or doesn't require distamt communication in the.inference steps, only using quantum theory. How it does it is the retrodiction appears to violate statistical independence because as far as I can tell, evolving back from...

I meant it does the same in both cases once you measured the outcome and evolve back from it. The gist of the mechanism is you measure H, retrodict H back at the source. Retrodicting that a H photon was emitted implies another V photon was also emitted due to the atom description at source...