Here is an 8-min video making the point. It’s the last episode in a 10-part video series for a general audience explaining the result https://youtu.be/kV3zGgdLJuw “Conclusion: Modern Physics is Comprehensive and Coherent”

Hi Jeff,

On p. 7 you write, “This intrinsic randomness allows new sorts of nonlocal probabilistic correlations for ‘entangled’ quantum states of separated systems.” We offer an explanation (couched in spacetime) of this fact in our post, Mysteries of QM and SR Share a Common Origin: No Preferred Reference Frame.

For example, in the simple…[Read more]

Everyone,
Have a look at this Physics Forums Insight to see our take on Wigner’s friend.

Richard,
When you get a chance, let us know if we have correctly characterized your view in that PF Insight. I can make changes anytime.

Mark

Thnx for the detailed response, Richard. Let me see if I totally understand it.

The state given by your Eq 13 applies to any of the three possibilities for the definite, single outcomes recorded by Xena and Yvonne in one world, i.e., heads- or tails- or tails+, respectively, prior to Zeus and Wigner making their measurements.

Eq 13 says that if…[Read more]

Hi Richard,
I much prefer your presentation of FR in Quantum Theory and the Limits of Objectivity (2018), so I will refer to that. Looking at your Eq (13) and understanding that there exists an objective fact of the matter about what Xena and Yvonne have recorded for their measurements (h or t and + or -, respectively), it seems unavoidable that…[Read more]

Thnx, Richard. I figured that was the answer, but I wanted to make sure before I fashioned a response (forthcoming).

No one in the topic on Frauchiger and Renner (FR) “Quantum theory cannot consistently describe the use of itself” (2018) answered this question, so I’ll post it here.

FR talk about a measurement of |h> – |t> by Wbar on the isolated lab Lbar. What does this measurement mean? If Lbar is a quantum system for Wbar, then all possible Hilbert space…[Read more]

I read Frauchiger and Renner (FR) “Quantum theory cannot consistently describe the use of itself” (2018) and I’ve read several responses in this workshop, but I have a question that has not been answered.

FR talk about a measurement of |h> – |t> by Wbar on the isolated lab Lbar. What does this measurement mean? If Lbar is a quantum system for W…[Read more]

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 🙂

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.

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]

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.

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.