QBism, Bohr, and the quantum omelette tossed by de Ronde

New paper posted [download PDF]

Abstract: In his recent paper “QBism, FAPP and the Quantum Omelette” [1608.00548v1] de Ronde makes a variety of questionable claims concerning QBism, Bohr, and the present author’s critical appraisal of QBism [1409.3312v1]. These claims are examined. Subsequently an outline is presented of what one might see if one looks into the quantum domain through the window provided by the quantum-mechanical correlations between outcome-indicating events in the classical domain.

Quantum Mechanics and Experience

My paper “Quantum Mechanics and Experience” has been uploaded to the arXiv [abstract, PDF]. It’s a substantially revised / largely rewritten version of “First-Person Plural Quantum Mechanics,” which was uploaded in October 2014. Here is the abstract:

Whether we want to make sense of the presence of consciousness in a seemingly material world or understand the role (if any) that consciousness plays in the fundamental theoretical framework of contemporary physics, it is imperative that we distinguish between two concepts of reality: an epistemically inaccessible transcendental reality and an empirical reality experienced and objectified by us. After a summary of Bohr’s views and their relation to Kant’s theory of science, two fruitless lines of attack on the measurement problem are discussed: the way of the ψ-ontologist and the way of the QBist. In the remainder of the paper the following results are obtained. (i) Because the testable correlations between outcomes of measurements of macroscopic positions are consistent with both the classical and the quantum laws, there is no conflict between the superposition principle and the existence of measurement outcomes. (ii) Intrinsically, each fundamental particle is numerically identical with every other fundamental particle. What presents itself here and now with these properties and what presents itself there and then with those properties is one and the same entity, herein called “Being.” (iii)  The distinction between a classical domain and a quantum domain is essentially a distinction between the manifested world and its manifestation. By entering into reflexive spatial relations, Being gives rise to (a) what looks like a multiplicity of relata if the reflexive quality of the relations is ignored, and (b) what looks like a substantial expanse if the spatial quality of the relations is reified. (iv) The reason why quantum mechanics is a calculus of correlations between measurement outcomes is that it concerns the progressive realization of distinguishable objects and distinguishable regions of space. (v) The key to the relation between quantum mechanics and experience is that Being does not simply manifest the world; Being manifests the world to itself. It is at once the single substance by which the world exists and the ultimate self or subject for which it exists. The question how we are related to this ultimate self or subject is discussed.

The Quantum Mechanics of Being and Its Manifestation

My article “The Quantum Mechanics of Being and Its Manifestation” has been published at Cosmology.com (Volume 24, April 2nd, 2016). Here is the link to the article, and here is the abstract:

How can quantum mechanics be (i) the fundamental theoretical framework of contemporary physics and (ii) a probability calculus that presupposes the events to which, and on the basis of which, it assigns probabilities? The question is answered without invoking knowledge or observers, by interpreting the necessary distinction between two kinds of physical quantities – unconditionally definite quantities and quantities that have values only if they are measured – as a distinction between the manifested world and its manifestation.

There also is an extended version containing an Appendix which the published version lacks. While the published paper touches on various ways in which quantum mechanics does not have to do with consciousness, this Appendix concerns what quantum mechanics has to do with consciousness. The extended version is available here.

Quantum mechanics in a new light

My paper “Quantum mechanics in a new light” has been published online in Foundations of Science (DOI 10.1007/s10699-016-9487-6 ). The final publication is available from Springer. The manuscript can be downloaded here.

Abstract: Although the present paper looks upon the formal apparatus of quantum mechanics as a calculus of correlations, it goes beyond a purely operationalist interpretation. Having established the consistency of the correlations with the existence of their correlata (measurement outcomes), and having justified the distinction between a domain in which outcome-indicating events occur and a domain whose properties only exist if their existence is indicated by such events, it explains the difference between the two domains as essentially the difference between the manifested world and its manifestation. A single, intrinsically undifferentiated Being manifests the macroworld by entering into reflexive spatial relations. This atemporal process implies a new kind of causality and sheds new light on the mysterious nonlocality of quantum mechanics. Unlike other realist interpretations, which proceed from an evolving-states formulation, the present interpretation proceeds from Feynman’s formulation of the theory, and it introduces a new interpretive principle, replacing the collapse postulate and the eigenvalue–eigenstate link of evolving-states formulations. Applied to alternatives involving distinctions between regions of space, this principle implies that the spatiotemporal differentiation of the physical world is incomplete. Applied to alternatives involving distinctions between things, it warrants the claim that, intrinsically, all fundamental particles are identical in the strong sense of numerical identical. They are the aforementioned intrinsically undifferentiated Being, which manifests the macroworld by entering into reflexive spatial relations.

Quantum mechanics and the manifestation of the world

My paper “Quantum mechanics and the manifestation of the world” has been published in Quantum Studies: Mathematics and Foundations 1 (3–4), pages 195–202, DOI 10.1007/s40509-014-0017-3. You can download it from Springer (for free) via this link.

An interesting new journal. In the preface to the second issue of Quantum Studies: Mathematics and Foundations the editors wrote:

After a very successful recent launch of this journal with the first issue, we continue to hope that this journal provides a home for those who think there are new worlds to be discovered by looking deeply into quantum mechanics. Our advice is: “Think, reconsider, explore, create deep questions, use paradoxes as a tool for understanding, and finally: publish in this journal!”

The reviewer of my paper wrote that it “describes a unique and refreshingly different view of quantum theory” — something one doesn’t get to hear very often. The paper is based on an invited talk at the Berge Fest, a conference celebrating the 60th birthday of Berge Englert (Centre for Quantum Technologies, National University of Singapore, 22–25 April 2014).

Conference venue
The Ngee Ann Kongsi Auditorium at the National University of Singapore, where the conference was held.

The talk in turn was based on my paper “Manifesting the Quantum World”, which was published in Foundations of Physics 44 (6), 641–677, DOI 10.1007/s10701-014-9803-3. You can get the preprint here.