@jacksarfatti
active 6 years, 4 months ago-
elpadrino joined the group Meaning of the Wave Function 7 years, 4 months ago
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Mark Stuckey replied to the topic Does the psi-epistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 8 years, 3 months ago
Thnx for the reply, Yehonatan. You don’t need to concern yourself with the details of our approach, as you noted it doesn’t bear directly on your specific motives. I just wanted you to be aware of the fact that your 4D global perspective has company 🙂
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Mark Stuckey replied to the topic Does the psi-epistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 8 years, 3 months ago
Yehonatan, I read your paper. Is it published someplace, so we can reference it? Your approach shares many of the values found in the Relational Blockworld. See http://www.ijqf.org/wps/wp-content/uploads/2015/06/IJQF2015v1n3p2.pdf.
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Mark Stuckey replied to the topic Does the psi-epistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 8 years, 3 months ago
Shan, there is no superdeterminism in retrocausality with global constraints. Superdeterminism entails a time-evolved story per the Newtonian schema (NS), i.e., invoking a physical mechanism that “causes” the experimentalist to make certain choices. In Wharton’s Lagrangian schema (LS), the explanation is spatiotemporally holistic, e.g., Fermat’s…[Read more]
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Mark Stuckey replied to the topic Does the psi-epistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 8 years, 3 months ago
Ken, why do you think “realist psi-epistemic view” is “an interesting choice of words”? The title of our last RBW paper in IJQF was “Relational blockworld: Providing a realist psi-epistemic account of quantum mechanics” which we wrote after extensive correspondence with you.
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Mark Stuckey replied to the topic Does the psi-epistemic view really solve the measurement problem? in the forum 2016 International Workshop on Quantum Observers 8 years, 3 months ago
As Price & Wharton point out, once you consider QM to be giving 4D distributions in spacetime (Lagrangian schema), rather than time-evolved distributions in configuration space (Newtonian schema), mysteries like the MP are resolved trivially. This is a psi-epistemic view.
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Mark Stuckey wrote a new post, Concerning Quadratic Interaction in the Quantum Cheshire Cat Experiment 8 years, 8 months ago
We believe the weak interaction of the quantum Cheshire Cat experiment must be linear if the weak values are to support the quantum Cheshire Cat interpretation, i.e., that a particle and one of its properties are spatially separated. For example, even though Denkmayr et al. measured the proper weak values for quantum Cheshire Cat in their neutron interferometry experiment, they did so using a quadratic interaction. We show how the quadratic interaction in their experiment destroys the quantum Cheshire Cat interpretation. Indeed, if the quantum Cheshire Cat interpretation is established per the weak values alone, regardless of the degree of interaction, then Denkmayr et al.’s experiment would be a reductio against the interpretation.
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Mark Stuckey replied to the topic General "Block Universe" Discussion in the forum Retrocausal theories 8 years, 9 months ago
Hi Ian,
What’s wrong with HV’s? What do you find objectionable about the spacetimesource element and adynamical global constraint of RBW, for example? Or Ken’s classical fields and L = 0 constraint?
Just curious 🙂
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Mark Stuckey replied to the topic General "Block Universe" Discussion in the forum Retrocausal theories 8 years, 9 months ago
Like Ken, I don’t understand why people use (tacitly or explicity) a Block Universe (BW) for retrocausality then add a “pseudo-time” or meta-time to artificially create a dynamical notion of “causation.” If you want a robust Now/Becoming, it will cost you lots more formal machinery than a bare BW. But, if you’re willing to pay the price, you can…[Read more]
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Mark Stuckey replied to the topic Possibilist Transactional Interpretation in the forum Retrocausal theories 8 years, 9 months ago
Hi Ruth,
I’ve seen Cramer’s “pseudo-time” process of TI mentioned in several topics of this forum being proposed as a way of introducing change and Becoming to the BW (blockworld). I have no idea what meta-time change means empirically and neither it seems do they. In my opinion, if you want an empirically/experientially meaningful notion of…[Read more]
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Mark Stuckey replied to the topic Quantum Oblivion and Hesitation in the forum Retrocausal theories 8 years, 9 months ago
Thanks for the detailed reply, Avshalom.
It’s a statement of ignorance of course, but I don’t know how to think about “pseudo-time” processes relative to our experience. A meta-time notion of “change” strikes me as absolutely meaningless. In contrast, the individual proper time frames of PTI are quite apprehensible and have everything you want…[Read more]
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Mark Stuckey replied to the topic Retrocausation vs Retrodiction in the forum Retrocausal theories 8 years, 9 months ago
Hi Bob,
I read Ch 24 and I don’t see what you’re proposing for an ontology that accounts for the Mermin device outcomes. All I see are principles of quantum mechanical formalism, which don’t provide any ontology. What physically, not formally, explains the correlations?
Thanks,
Mark -
Mark Stuckey replied to the topic Quantum causal models, faithfulness and retrocausality (onl. 7/16 @ 11pm UTC+10) in the forum Retrocausal theories 8 years, 9 months ago
Hi Pete,
I think I’m close to understanding faithfulness. Let me respond to your last paragraph so you can correct me as necessary.
Retrocausality avoids the non-locality conclusion of Bell inequality violations by denying statistical independence (SI). It does this by providing a causal mechanism that hides a true statistical dependence (…[Read more]
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Mark Stuckey replied to the topic Quantum causal models, faithfulness and retrocausality (onl. 7/16 @ 11pm UTC+10) in the forum Retrocausal theories 8 years, 9 months ago
Hi Pete,
I agree completely with your premise that “since it is also the case that we occupy this reality and we have been able to provide rather successful causal and dynamical models representing the phenomena around us, then there must be some sort of story explaining how we can do this given that reality is actually a 4D block obeying said c…[Read more]
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Mark Stuckey replied to the topic The Quantum Cheshire Cat Experiment of Denkmayr et al in the forum Pragmatist approaches 8 years, 9 months ago
The arXiv paper has been rewritten in the form it was just today submitted to New J Phys (where Aharonov published his quantum Cheshire Cat proposal and Correa et al. published their qCC paper). Yesterday, Nature Comm said they would not publish our Brief Communication Arising on the refutation because it’s based on an unpublished technical point…[Read more]
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Mark Stuckey replied to the topic Quantum causal models, faithfulness and retrocausality (onl. 7/16 @ 11pm UTC+10) in the forum Retrocausal theories 8 years, 9 months ago
Hi Pete,
If you don’t see the connection between my footnote and faithfulness, it’s likely because I don’t properly understand faithfulness and there is no such connection. I was thinking faithfulness implies no ad hoc causal mechanisms, such as fine-tuned future boundary conditions. A time-like causal link that isn’t directed constitutes fine tu…[Read more]
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Mark Stuckey replied to the topic General "Block Universe" Discussion in the forum Retrocausal theories 8 years, 9 months ago
Ken,
On p 8 of http://arxiv.org/pdf/1503.00039.pdf Cramer writes, “The transaction that forms after the emitter-absorber offer-confirmation exchange process goes to completion is the real object, what we would call the ‘particle’ that has been transferred from emitter to absorber.” Now look at Figures 3 and 5, and you’ll see that he’s using a BW.…[Read more] -
Mark Stuckey replied to the topic General "Block Universe" Discussion in the forum Retrocausal theories 8 years, 9 months ago
Ken,
I was trying to be exhaustive concerning the view of QM in a BW. To do that I have to include TI with its “pseudo-time” processes. You agree TI is in a BW, right? And having mentioned TI with its “pseudo-time” processes, I had to mention PTI with its proper time evolving BW (of sorts). This is precisely the point of PTI’s departure from…[Read more] -
Mark Stuckey replied to the topic Retrocausation vs Retrodiction in the forum Retrocausal theories 8 years, 9 months ago
Hi Bob,
Retrocausal approaches were designed to explain (among other things) space-like separated correlated experimental outcomes that violate Bell’s inequality without resorting to superluminal mechanisms. I don’t see how such outcomes would be explained by CH from reading your attachment. For example, how does CH explain the outcomes of the…[Read more]
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Mark Stuckey replied to the topic General "Block Universe" Discussion in the forum Retrocausal theories 8 years, 9 months ago
Hi Bob,
First let me say that I’ve been using term “blockworld” (BW) for years and was only this year told by my philosopher of science colleague that it’s now “block universe.” Since I’m speaking with a fellow physicist, I’m going to revert to BW 🙂
I received my PhD in general relativity (GR) and have taught it many times, so I perhaps take…[Read more]
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