A Cool Digital Physics Blog

So far I’ve been pretty good at saying what I’m going to do: develop algorithms that show how particular aspects of physics can occur in a locally randomised discrete network. Well someone’s already doing it. It’s Alex Lamb over at How To Build A Universe. I particularly like his post Making Waves 4 where he has created a wave in his random network that propagates as an expanding circle, encounters a wall with two slits, and then creates an interference pattern from the bits of wave going through each slit. This is a great result.

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Why The Big Bang? Part 3: Networks

“Space is big. You just won’t believe how vastly, hugely, mindbogglingly big it is. I mean, you may think it’s a long way down the road to the chemist’s, but that’s just peanuts to space.”       –     Douglas Adams, The Hitchhiker’s Guide to the Galaxy

In the previous two parts I discussed two ideas:

                That the universe is finite.

                That any computable mathematical structure exists in the same sense as our universe exists.

I would now like to suggest the general form of structure our universe takes: that of a network or graph. I’ll be considering a network to be a finite number of points, some of which are connected and some are not. That’s it. For example:

Network

Clunky graphics I know, but I’m working on it. Continue reading

Why The Big Bang? Part 2: Existence

“All is number”       –        Pythagorean School

In Part 1 I attempted to present some of the philosophical reasons why we may think infinity is a pretty dodgy concept. I now want to address the second and third questions I posed

What do we mean when we say mathematics exists?

What do we mean when we say the universe exists?

Much has been said about reality and existence, probably way too much. I’m not trying to introduce new ground here, just present a view that I think goes nicely with the idea that everything is finite. That view is known as the Mathematical Universe Hypothesis (MUH) an idea originated by Max Tegmark. It states that our universe is nothing more nor less than a mathematical structure. It implies that any mathematical structure exists in the same sense that our universe exists. I won’t elaborate on this in great detail (I hope to in a later post) but I’d like to give some brief motivation to this idea. Continue reading

Why The Big Bang? Part 1: Infinity

“Next contestant Sybil Fawlty from Torquay, special subject the bleeding obvious”

–   John Cleese, Fawlty Towers

In these posts I want to present a line of reasoning that is an explanation of why this universe exists, and in particular why it started with a Big Bang.

There are a few points to cover so it will require a bit of patience on your part. Along the way I will be attempting to answer three questions in particular:

                What do we mean when we say infinity exists?

What do we mean when we say mathematics exists?

                What do we mean when we say the universe exists?

A key part of my line of reasoning is the presumption that the universe is finite along the lines of digital physics. To try and persuade you of this I need to first talk about infinity as it is presented in mathematics and this requires me to talk about the axioms of mathematics, where infinity first makes its ugly appearance. Continue reading

Hello

Hello. This blog is about digital physics (DP), a fringe-but-not-fringe view of the fundamental physics of the universe that considers the physics of the very small to be ultimately discrete – both with respect to distance and time. My aim is to present some readable, understandable commentary on issues around DP for anyone interested and prepared to listen. While I may present some mathematics, I’ll attempt to keep the wordy parts comprehensible on their own.

I also plan to create some simulations (with movies) but alas, I may well be confusing Ambition with Ability. Continue reading