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Welcome!

Welcome! Here you will find information about the latest, relativistic version of the transactional interpretation of quantum mechanics, 'RTI', blog posts, and an opportunity for informal discussion. The transactional interpretation (TI) is a new way of understanding what's behind the formalism of  quantum physics. I'm pleased to announce the formation of a new non-profit research … Continue reading Welcome!

Happy New Year! …and the latest on RTI

I'm celebrating the advent of 2021 with a post featuring the very latest theoretical developments supporting the Relativistic Transactional Interpretation (RTI): The Relativistic Transactional Interpretation and The Quantum Direct-Action Theory This material is based on Chapter 5 of the forthcoming 2nd Edition of my book The Transactional Interpretation of Quantum Mechanics: The Reality of Possibility … Continue reading Happy New Year! …and the latest on RTI

A Common Worry About TI and Why It’s Not a Problem

In this post, I address a question that pops up from time to time as a possible objection to the transactional picture. The scenario involves a very distant star that engages in a transaction with a person’s eye, so that they see the star as it existed billions of years ago. But suppose the star … Continue reading A Common Worry About TI and Why It’s Not a Problem

Latest incarnation of the Schrödinger Cat Paradox forces a new view of quantum theory

I’ve updated this post since this paper is now published in Foundations of Physics, at this link: https://link.springer.com/article/10.1007%2Fs10701-020-00336-6

Transactional Interpretation

A recent paper by Frauchiger and Renner has brought to light a serious problem with  conventional approaches to quantum theory, by deriving a contradiction using those approaches. In  FR Paradox Kastner 10.17.19  I argue that the paradox shows that quantum theory leads to absurdities and inconsistencies unless there is a clear physical criterion for ‘measurement’.  This is a draft, so comments welcome!

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Review of Adventures in Quantumland by “Jehannum” (amazon.com)

A review from UK reader "Jehannum" was recently posted on the amazon.com page for my recent book Adventures in Quantumland: Exploring Our Unseen Reality (WSP, 2019). I reproduce it below: ***************** 5.0 out of 5 stars This book provides a revolutionary understanding of quantum physics. It's common to come out of a study of quantum … Continue reading Review of Adventures in Quantumland by “Jehannum” (amazon.com)

Why the Quantum Absorber Condition is Not a Light-Tight Box

(This is a preprint version of a technical paper. I'm making it available here in addition to the usual preprint servers. Questions/comments welcome.) Click here for the paper:  Light Tight Box Preprint Abstract: This paper discusses the nature of the boundary condition applying to the direct-action theory of fields, also known as the 'absorber' theory, … Continue reading Why the Quantum Absorber Condition is Not a Light-Tight Box

Latest incarnation of the Schrödinger Cat Paradox forces a new view of quantum theory

A recent paper by Frauchiger and Renner has brought to light a serious problem with  conventional approaches to quantum theory, by deriving a contradiction using those approaches. In  FR Paradox Kastner 10.17.19  I argue that the paradox shows that quantum theory leads to absurdities and inconsistencies unless there is a clear physical criterion for 'measurement'.  … Continue reading Latest incarnation of the Schrödinger Cat Paradox forces a new view of quantum theory