Does it matter whether God plays dice?

I argue that results from algorithmic number theory imply intrinsic randomness in models of quantum theory is much less important than has been assumed. I also point out some of the confusion in terminology of models of quantum theory, in particular the meaning of realism in relation to Bell's theorem

Cellular Automata and the Measurement Problem

I argue that a macroscopic apparatus such as a measuring device has never been satisfactorily modelled in terms of microphysics. It may be unrealistic to expect to do so in terms of quantum physics, so I argue that it would be worth building such a model in a system with simplified form of physics, and that Cellular Automata provide the best place to start

Expanding Space: Just say No

I argue that the idea of expanding space as a way of explaining the behaviour of the universe is unhelpful, in that it not only creates misconceptions for those new to cosmology, but also has traps for those with much more experience of the subject

About the Quantropy.org eprint repository

Quantropy.org is an eprint repository which allows anyone to post and get feedback on a paper. I explain why people should think of posting their work to Quantropy and discuss the benefits this repository might brin

It’s digital but not as we know it

I describe some of the problems which occur when we think of the microworld as having similar properties to the macroworld of our everyday experience. In mathematics this leads to an over-reliance on approximation, and in physics to problems related to thermodynamics, problems which I see as underlying some of the weirdness of quantum theory. I explore some of the possible ways to deal with this, and look forward to a greater use of computer simulations in science, and in particular in investigating foundational issues in physics

Constructing a Gödel Sentence

I argue that Gödel's incompleteness theorem is much easier to understand when thought of in terms of computers, and describe the writing of a computer program which generates the undecidable Gödel sentence

A simulation of the two hemispheres Bell experiment

Abstract--- In [arxiv:0806.3078] Joy Christian proposes an experiment to test Bell's theorem in a purely macroscopic domain. I describe a computer simulation of the experiment, and find that it does not violate Bell's inequalities

Tethered galaxies and the expanding space paradigm

oai:generic.eprints.org:2I examine the counterintuitive claim from Davis et.al. that a stationary or receding galaxy in an expanding universe may exhibit blueshift, even when the universe contains no gravitating matter. I show that with more precise calculations the effect disappears for the empty universe. I also discuss how this is related to the currently popular idea of ‘expanding space’, looking at how this idea arose, and why I think it has serious flaws

Bell's theorem refuted in line with Bell's hope and Einstein's ideas

Supporting Einstein's advocacy for local realism and hidden-variables, we show that measurement outcomes (manifest-variables) reveal the equivalence classes to which hidden-variables belong. We show that equivalence classes are the fundamental concepts that any analysis of measurement requires. We show that the correlation of manifest-variables equates to the pre- and post-measurement correlation of equivalence classes. We show that, though hidden-variables remain hidden, manifest-variables enable us to name their equivalence classes. Revealing the local realistic variables that alone determine measurement outcomes, we identify Bell's unrealistic assumption about measurements and refute his theorem. Responding to Bell’s hope for a simple constructive model of quantum entanglement, we also deliver Einstein's wish for a classical account of EPR correlations. We thus provide a basis for understanding quantum mechanics in terms of local realism and deterministic digital outcomes

Bell's theorem refuted in line with Bell's hope and Einstein's ideas

Supporting Einstein's advocacy for local realism and hidden-variables, we show that measurements reveal the equivalence classes to which hidden-variables belong. We show that equivalence classes are the fundamental concepts that any analysis of measurement requires. We show that the correlation of measurement outcomes equates to the pre- and post-measurement correlation of equivalence classes. We show that hidden-variables remain hidden; but measurements enable us to name their equivalence classes. We reveal the local realistic variables that alone determine measurement outcomes. We identify Bell's unrealistic assumption about measurements and refute his theorem. Responding to Bell’s hope for a simple constructive model of quantum entanglement, we also deliver Einstein's wish for a classical account of EPR correlations. We thus provide a basis for understanding quantum mechanics in terms of local realism and deterministic digital outcomes