@ruth
active 3 years, 2 months ago-
Ruth Kastner commented on the post, Remarks on the Relativistic Transactional Interpretation of Quantum Mechanics 6 years, 4 months ago
Prof. Marchildon’s objections are based on numerous misunderstandings, which I’ve tried to correct in emails (apparently unsuccessfully). I will try again here.
First, he is still looking for empirical predictions from RTI that differ from standard quantum theory. But as I’ve repeatedly noted in an email exchange with him, RTI is empirically…[Read more] -
Ruth Kastner posted an update 6 years, 4 months ago
At the request of D. Kalamidas I am posting his proposal for FTL signaling which appears in Pramana here: http://rdcu.be/AZYC
I think it cannot work because it requires a well-defined time order for spacelike separated events, in which the measurement outcomes are assumed to occur for the signaler prior to the recipient, contrary to relativity…[Read more] -
Ruth Kastner replied to the topic The Relativistic Transactional Interpretation is a Collapse Theory in the forum 2017 International Workshop: Collapse of the Wave Function 6 years, 4 months ago
Just an update that this paper has been accepted in this journal.
-
Ruth Kastner posted an update 6 years, 5 months ago
I recently posted on the arxiv a paper written with John G. Cramer, refuting claims that absorption is not well-defined in the transactional interpretation. Comments welcome. https://arxiv.org/abs/1711.04501
It should be noted that TI is not in the class of theories termed ‘spontaneous collapse theories’ (even though it has spontaneous col…[Read more] -
Ruth Kastner commented on the post, Weekly Papers on Quantum Foundations (45) 6 years, 5 months ago
Hi, I’d like to note the following 2 papers that seem to have been left off the list (apologies if I’ve overlooked them):
https://arxiv.org/abs/1709.09367 “On the status of the Measurement Problem: Recalling the Relativistic Transactional Interpretation” (Kastner, R.)
and
https://arxiv.org/abs/1711.04501 “Quantifying Absorption in the…[Read more]
-
Ruth Kastner started the topic The Relativistic Transactional Interpretation is a Collapse Theory in the forum 2017 International Workshop: Collapse of the Wave Function 6 years, 7 months ago
Reasons to consider the Relativistic Transactional Interpretation, which allows for collapse without changing the basic quantum theory (and remedies shortcomings in the original TI):
On the Status of the Measurement Problem: Recalling the Relativistic Transactional Interpretation
-
Ruth Kastner wrote a new post, On the Status of the Measurement Problem: Recalling the Relativistic Transactional Interpretation 6 years, 7 months ago
ABSTRACT. In view of a resurgence of concern about the measurement problem, it is pointed out that the Relativistic Transactional Interpretation (RTI) remedies issues previously considered as drawbacks or refutations of the original TI. Specifically, once one takes into account relativistic processes that are not representable at the non-relativistic level (such as particle creation and annihilation, and virtual propagation), absorption is quantitatively defined in unambiguous physical terms. RTI therefore provides a well-defined terminus to what appears to be a necessary infinite regress concerning ‘absorption’ when only the non-relativistic level is considered. In addition, specifics of the relativistic transactional model demonstrate that the Maudlin ‘contingent absorber’ challenge to the original TI cannot even be mounted: basic features of established relativistic field theories (in particular, the asymmetry between field sources and the bosonic fields, and the fact that slow-moving bound states, such as atoms, are not offer waves) dictate that the ‘slow-moving offer wave’ required for the challenge scenario cannot exist. It is concluded that issues previously considered obstacles for TI are no longer legitimately viewed as such, and that reconsideration of the transactional picture is warranted in connection with solving the measurement problem. PDF here: On the Status of the Measurement Problem Arxiv7
-
Ruth Kastner posted a new activity comment 6 years, 11 months ago
I should add that there has been an attempted refutation, but that was shown to be based on misunderstanding of the model (refs on request)
-
Ruth Kastner posted an update in the group 2017 International Workshop: Collapse of the Wave Function 6 years, 11 months ago
I hope that the editors of the mentioned volume will consider non-unitary collapse in the transactional picture. I realize that this is not considered a ‘mainstream’ approach, but there are ample peer-reviewed publications on it with no refutations that I’m aware of. A recent peer-reviewed publication on the advantages of collapse for…[Read more]
-
-
Ruth Kastner commented on the post, Quantum measurements as weighted symmetry breaking processes: the hidden measurement perspective 7 years, 5 months ago
The author is entitled of course to present his own preferred deterministic model of measurement. But the paper goes too far in its characterization of another interpretation’s account of measurement as ‘incomplete’ based on the author’s own particular (optional) metaphysical preference. Nature may not in fact behave in the deterministic way tha…[Read more]
-
Ruth Kastner commented on the post, Violation of the Born Rule: Implications for Macroscopic Fields. 7 years, 11 months ago
The submitted paper shows that violation of the Born Rule leads to a breakdown of the correspondence between quantum and classical forms of the electromagnetic field. The paper does not argue that energy conservation is violated at the micro-level, so the arguments put forth here don’t refute anything in the paper. It is straightforward that…[Read more]
-
Ruth Kastner wrote a new post, Violation of the Born Rule: Implications for Macroscopic Fields. 8 years ago
ABSTRACT. It is shown that violation of the Born Rule leads to a breakdown of the correspondence between the quantum electromagnetic field and its classical counterpart. Specifically, the relationship of the quantum coherent state to the classical electromagnetic field turns out to imply that if the Born Rule were violated, this could result in apparent deviations from the energy conservation law applying to the field and its sources (Poynting’s Theorem). The result, which is fully general and independent of interpretations of quantum theory, suggests that the Born Rule is just as fundamental a law of Nature as are the field conservation laws.
-
This paper has been sent out for peer review.
-
I think this paper is not correct. Of course, if one tries to violate the Born rule using only the equations of orthodox quantum theory, then one will get spurious results like an apparent violation of energy conservation. However, it is quite obvious from Rod Sutherland’s retrocausal “weak measurement” completely relativistic Lagrangian formulation of Bohm’s pilot wave/beable theory with the additional post-quantum action-reaction terms between the pilot waves and the beables that the stress-energy current densities are conserved i.e. Tuv^;v = 0 where Tuv = Tuv(pilot wave) + Tuv(be able) + Tuv(pilot wave be able). Kastner’s paper only has, in effect the Tuv(pilot wave) term. There is no consistent way to violate the Born rule without the additional terms. That’s all Kastner has really shown in my opinion. Sutherland has posted his theory elsewhere on this forum.
-
The submitted paper shows that violation of the Born Rule leads to a breakdown of the correspondence between quantum and classical forms of the electromagnetic field. The paper does not argue that energy conservation is violated at the micro-level, so the arguments put forth here don’t refute anything in the paper. It is straightforward that deviation of the photon detection rates from that given by the Born Rule as applied to coherent states results in deviations from Maxwell’s equations. One can see that simply by looking at how, for violations of the Born Rule, the amplitude envelope of the field would stray from the form required for classical correspondence (see https://en.wikipedia.org/wiki/Coherent_states#/media/File:Coherent_state_wavepacket.jpg) . Evidently the commenter thinks that it would be possible to violate the Born Rule and still preserve the quantum/classical correspondence in a different theory. He is welcome to demonstrate how that would work (even though the referenced figure clearly shows that deviations from Born Rule detection rates spoils the amplitude envelope). In any case, that would not refute the submitted paper, because it is not the subject of the paper.
-
A referee report has been received.
-
Ruth misunderstands my claim. The Sutherland action-reaction post-quantum violation of the Born rule vanishes in the limit where the Glauber coherent state solutions apply to the real world. Therefore, her argument is logically inconsistent.
-
Referees agreed with arguments in this paper and it has been accepted. Indeed there is no inconsistency; if there is no Born Rule violation in the limit Dr. Sarfatti discusses, then there is also no ‘real world’ applicability of such Born Rule violations as he has previously argued. The paper simply shows that real world Born Rule violations lead to real world deviations from Maxwell’s equations. This is an elementary result that is not controversial.
-
-
Ruth Kastner commented on the post, An Information-Based Solution to the Measurement Problem in Quantum Mechanics 8 years ago
A solution to the measurement problem is available in the transactional picture (TIQM). See eg Kastner (2012): http://www.cambridge.org/9780521764155
and in conceptual terms for the general reader, my latest book:
http://www.worldscientific.com/worldscibooks/10.1142/p993
Best wishes,
RK -
Ruth Kastner replied to the topic Possibilist Transactional Interpretation in the forum Retrocausal theories 8 years, 9 months ago
Thanks Mark,
I don’t know either. Hey out there, please tell us what you don’t like about PTI.
But please let your critique be based on an open-minded reading of the published literature, unlike some critiques out there 🙂 -
Ruth Kastner replied to the topic What are the most pressing problems? and how to solve them? in the forum Panel Discussion 8 years, 9 months ago
It is not necessary for quantum mechanics to be local to provide consistency with relativity.
If QM is taken as describing a pre-spacetime domain from which spacetime emerges, there is no conflict.
I provide such an account in PTI (e.g. http://www.cambridge.org/9780521764155) -
Ruth Kastner replied to the topic Retrocausal Bohm Model in the forum Retrocausal theories 8 years, 9 months ago
Thanks Rod,
I certainly would not dismiss a model simply because it implied a block universe. I have had extensive discussions with the Relational Block World folks (Mark and Michael), and while that’s not my favored approach, it’s not because it’s a block world.
My concern about the model you’re proposing is that while it describes dynamical…[Read more]
-
Ruth Kastner replied to the topic Retrocausal Bohm Model in the forum Retrocausal theories 8 years, 9 months ago
Hi Rod,
Have you thought any more about the block universe question? It seems to me that with the initial and final BC, all spacetime events are ‘set’ and therefore we must have a block world here. I’d be curious to know whether you agree.
Thanks,
Ruth -
Ruth Kastner replied to the topic Possibilist Transactional Interpretation in the forum Retrocausal theories 8 years, 9 months ago
I would agree with that. In PTI what we call ‘particles’ are just actualized transactions bringing about the observed spacetime events.
-
Ruth Kastner replied to the topic Possibilist Transactional Interpretation in the forum Retrocausal theories 8 years, 9 months ago
Thanks Alan, this raises the issue of interpretation of the wf. It’s a vexed issue because most people presuppose that ‘real’ = ‘spacetime object’ but in general the wf is not compatible with spacetime existence. For those who accept that definition of real (whether tacitly or explicitly), this leads to antirealism about the wf on the one hand,…[Read more]
- Load More