Ruth Kastner has made another effort to explain the “transactional theory of quantum mechanics”. My Amazon review of this excellent book is included below with a link to her text. In this commentary I address one technical aspect (or consequence) of the theory and separately her more speculative ideas in chapters 6 and 7 (both mentioned in the review). Her first attempt at explaining her ideas to a lay readership, the book “Understanding our Unseen Reality” 2015 is reviewed here.
The technical issue is I hope straight forward. In Dr. Kastner’s scheme, energy is not transferred, nor a spacetime event realized until a virtual or “incipient transaction” becomes a “real transaction”. Incipient transactions happen between any potential emitter of some quantum of energy, and all the possible absorbers of that quantum (the atoms that could absorb it) throughout the universe! They happen outside of spacetime and so their instantaneous virtual interaction throughout the universe is not at issue here.
What is at issue is that as I read her, no real transaction can begin until one of the emitter (offer wave) absorber (confirmation wave) pairs is promoted to a real transaction. A photon cannot be emitted until it has a determinate absorber destination! How does this idea work if the absorber is an atom in the detector of a telescope on Earth, and the emitter is a star in a galaxy 10 billion light years distant? How could there have been an actualized transaction between a star and a telescope that did not exist when the photon was emitted? I have identified two separate problems here.
First, the confirmation waves come from absorbers capable of absorbing the photon which, at the time of its emission, might have been an X-ray photon. But by the time of its real absorption by some atom in our telescope detector has been stretched way into the red end of the spectrum. It is possible that our red-capable absorbing atom could not possibly have produced a confirmation wave for an X-ray photon.
Secondly, at the time of the emission, the atom that ended up in the detector of the telescope might have been anywhere in the vicinity of the Earth/Sun system such as it was at the time, perhaps a just coalescing mass of hydrogen gas and dust swirling around a proto-star. How did that lucky atom end up in our telescope and not in the center of the Earth, or the moon or anywhere else in the solar system? Further the spatial relation between the proto solar system and our emitting star would be completely different than it is now 10 billion years later. But when we trace the path of our captured photon it always appears to have made a beeline (least time) path between the emitting star and that particular place in space where the Earth (and our telescope) just happen to be 10 billion years after emission.
I suspect Dr. Kastner has an answer here, or I am misunderstanding something about what she means about emission requiring an actualization between offer and confirmation waves. I hope she will address a query sent to her. If she does I will update this blog entry with her explanation.
In her chapters 6 and 7 she goes off the rails speculatively speaking. Her aim in chapter 6 is free will. There is nothing here that hasn’t been said before by others (broadly a theory called dual-aspect monism, see my “Fantasy Physics and the Genesis of Mind”). Kastner begins by demolishing the anti-free-will arguments of David Dawkins and others of a similar type. She does a marvelous job from the viewpoint of the idea’s epistemological absurdity. If there is no free will, then Dawkins’ book isn’t really “his” and so on. In this she is entirely right even to pointing out that the view reduces us to automatons, something I have said for years (see my “Arguing with Automatons”).
Kastner points out that if nothing else, quantum mechanics shows the universe is not fully deterministic. Quantum mechanics “makes room” for free will. That’s fair enough. She also recognizes that “making room” and “the phenomenon” (free will) itself are two different things. Why? Because free will is not merely not-determined (indeterminate) but purposeful. Free will introduces teleology and if not for the universe as a whole then at least for the free-willed individual. Choice is always exercised “for a purpose”, and this is something quantum mechanics doesn’t address unless…
Kastner’s next move, the metaphysical move, is where she goes wrong. Perhaps, she says, quantum phenomena are not merely indeterminate. Perhaps they are also proto-volitional; there is in the phenomenon that which leads directly to the human sort of free will through some ascending volitional hierarchy? Something is “built into physics” that bears the germ of volition. She is, in effect, saying: we have a mystery here (free will) and we have a mystery there (Quantumland), perhaps one mystery is the explanation of the other? Now she emphasizes that this move is pure speculation but what is the point of it other than to fix a source of volition in a universe that is otherwise determinate and indeterminate at the same time, but not volitional.
No one (including Dr. Kastner) asserts that virtual quanta are conscious, but nor can anyone (including Dr. Kastner) tell us in what exactly, besides the non-teleological behavior described so well by mathematics, this proto-volitional consists! What is even a single “identity characteristic” of a proto-volition? In what way does (or even might) proto-volition contribute to quantum measurement outcomes? Where would a proto-volitional term fit into the equations of quantum mechanics? If there is no place for it why say it (volition) might be there other than the purely metaphysical need to have it start somewhere coupled with the metaphysical assumption that there is nothing more to the universe than the physical (including Quantumland).
To put the matter another way, Quantumland is speculation but not “empty speculation”. There are observables, particles communicating at seeming space-like distances and being in two places at once. A “foundation to macrophysics” outside of spacetime makes perfect sense in this context. Raw space and time can be seen to emerge from its seething processes. Quantumland explains a lot. It gives us part of the mechanism of spacetime emergence, and it removes the mystery from many of its emerging observables.
By contrast there is no observable that demands volition at the microscopic level. That volition (or proto-volition) is to be located there explains nothing about the mechanism of [much later] emerging consciousness. Free will is expressed only by or through consciousness (human or animal) as far as we know. The speculation here is empty of content. Nothing stands as an example of a property that ultimately adds up to consciousness or the volitional will of consciousness.
Quantum mysteries are encountered at just the point where they enter spacetime, but volition is not encountered in any obvious way until we reach all the way up to macroscopic brains. This is not to say that quantum phenomena are not involved in producing consciousness. It would surprise me if they weren’t! But this does not mean that quantum phenomena are themselves volitional or even proto-volitional there remains no teleology in physics.
This then brings me to chapter 7 where there is a related problem. The problem in chapter 6 is the emptiness of the speculation, the ad hoc quality of throwing volition into Quantumland because materialism has no other place to put it. In chapter 7 the problem is an induction fallacy. That Eastern metaphysics refers to a world beneath (or above or beyond) that of our physical senses, a world that is the source of the physical, does not mean they are talking about Quantumland! A Buddhist or Hindu using the word ‘energy’ and a physicist using the same word are not necessarily talking about the same thing (Dr. Jacob Needleman pointed this out to me a long time ago using “The Tao of Physics” [Capra], one of the books Kastner mentions in this chapter). Of course they could be talking about the same thing, and if you read enough of both you can cherry pick qualities from each that seem to overlap. Kastner does this in this chapter.
At the same time, Dr. Kastner gives herself the clue to their difference. The “spiritual traditions” all ascribe some sacredness to that which underlies our ordinary reality, but she doesn’t fully grasp the implications. Sacredness is intrinsically teleological. The source of our ordinary reality according to the “spiritual traditions” is purposeful, and being indirect products of it, we human beings have some relation, some responsibility to that purpose. But in no wise does it make sense to say we have any responsibility to Quantumland (nor does Dr. Kastner say such a thing), and this is precisely because Quantumland is not teleological.
Kastner must realize this implicitly as she reminds us multiple times that her ascription of volition to Quantumland (chapter 6) has no bearing on her physical theory as such. But nor is the traditional ascription of sacredness to “the other” some sort of mistake on the part of such traditions. It is a necessary quality of the other to which the traditions refer; a demonstration (as it were) that they are not speaking of Quantumland! There is nothing wrong with calling attention to the fact that spiritual traditions refer to “another reality” underlying our ordinary experience. Quantumland is also another possible reality underlying the macrophysical. But they are two different kinds of “other reality”.
If materialists wish to insist that the sacred sort of other doesn’t really exist, I can only say that until such time as there are observables that pick one theory out over another the same can be said of all the competing quantum others advocated by physicists and philosophers today.
I will leave things here because after all neither of these chapters bears in any way on the transaction interpretation of quantum mechanics as a physical theory. Unlike in her addenda to this latest book, Dr. Kastner isn’t resolving any paradoxes in these chapters. Indeed the misapplied logic (chapters 6 & 7) and misunderstood metaphor (chapter 7) is all on her side; though again and to repeat, none of this has ought to do with the explanatory value of the physical theory.
Adventures in Quantumland: Exploring Our Unseen Reality. Ruth Kastner 2019.
In (2015) Ruth Kastner, a physicist and philosopher, published “Understanding Our Unseen Reality”, a layman’s version of her earlier “The Transactional Interpretation of Quantum Mechanics” (2014). This book, “Exploring Our Unseen Reality”, is something of an addendum to that earlier work. It is really two books in one. The first half (roughly) is the book, while the last half is a collection of papers authored by Kastner, and sometimes collaborators, each addressing a specific (usually in more technical terms) issue covered in the book’s first half. Kastner frequently refers back (by chapter and page) to her earlier book. It isn’t necessary to have read the earlier book, Kastner makes her overall case perfectly well in this book alone using minimally more technical language (really symbols) to which she introduces us. On the one hand, this book’s explication of the theory’s main points and implications is brief. On the other hand, Dr. Kastner has had a lot of practice explaining the transactional interpretation and this latest attempt is clear and succinctly expressed.
Beginning with the basics Kastner moves us through subjects that are important to understanding her with a particular emphasis on the fact that her theory does not demand (I get the impression she encounters this idea a lot) that some mind be present to “collapse the quantum wave function”. To be clear, there are wave functions that minds do collapse. the ones that end in a quanta-absorbing event in one of our sensory neurons (and from there up the chain to our brains). In general, however, wave collapse is the result, the completion, of a measurement and that means a transaction between a quantum emitter and some absorber whether that absorber is in an eye, a brain, or the detector of some instrument.
The key to the theory is that the transfer of a quantum (measurable energy) requires an interaction between an emitter and absorber. There are two sorts of interactions here, incipient and actual. Incipient interactions happen between an emitter (an “offer wave”) and every potential absorber in the universe (“confirmation waves”), literally every atom that can absorb a photon of that particular energy. It doesn’t matter if these potential absorbers are near to or far from the potential emitter (in the incipient stage nothing has been yet emitted). Every incipient potential occurs instantly and simultaneously throughout the universe. One of these “offer wave/confirmation wave” (confirming that some emitter is ready to emit) “incipient transactions” wins out (remember this has taken place in zero time and across all space from our viewpoint in timespace) and becomes an “actual transaction”. The photon is emitted generating the beginning of a real singular timespace event propagating at the speed of light, and ends when the winning absorber receives the photon. The absorption constitutes a measurement because energy is transferred between the emitting and absorbing atoms. The transaction is complete.
If Dr. Kastner is right here, her theory has implications as revolutionary as the original insight (energy is quantized) resulting in the first generation of quantum mechanics. It would mean that no real photon can leave an emitter until a real absorber is selected out of the incipient possibilities. Personally I do not see how this can be. What if the absorber, the one that completes the transaction, is at the business end of a telescope while the [real not incipient] absorbed photon was emitted from a star 10 billion light years away; long before that telescope existed? There are several potential issues here and I suspect Kastner has an answer, but she does not explicitly address this. See my blog for further discussion.
In the final chapters of the book Kastner gets speculative about quantum mechanics and mind or more specifically the possibility of free will. This is not the “mind collapses the wave function” business, but its opposite. Not only does quantum mechanics give us an escape from absolute macroscopic determinism (fair enough) but rather that the quantum realm is somehow proto-volitional. The last chapter explores some speculations on the potential analogy between Kastner’s Quantumland (beneath spacetime) and various ideas present in ancient Greek and Eastern (Hindu and Buddhist) metaphysics. Kastner follows others, citing references, in all of these speculations. I have problems with both of these ideas, but this is not for a review and Kastner is sedulous about these being purely speculative, having no direct bearing on the transactional theory as such.
Following her last chapter, Kastner gives us an epilogue calling attention to (and thanking) her predecessors in the explanatory thread leading to the transactional interpretation, followed by an addendum in which she addresses several long standing “quantum paradoxes”. Her aim here is to show that they are not paradoxes at all, but bad interpretations of data even apart from the transactional theory, and that the transaction idea can make paradox resolution easier to grasp.
In summary an excellent if abbreviated explication of the “transaction theory”. In response to her previous book I said that Dr. Kastner’s theory is the only one I’ve ever encountered that “explains quantum mysteries without explaining them away”. Having read this book I see no reason to change my mind.