Pretending I know anything about physics
2009.05.29 11:05 by Leo Antunes - 0 CommentOne argument I’ve seen thrown around a few times about why an universe simulator couldn’t work is that it would need the processing power of the entire universe to simulate the entire universe, given a quantum state granularity of details.
While I do agree this might be strictly true in the physical sense (I’m unfortunately no quantum physicist to judge), I disagree it might be a deterrent in most contexts I’ve seen this used, namely when speaking about the totally immersive matrix-like simulators envisioned by some post-singularity proponents.
The reason I disagree (as much as a layman can) is that being totally immersive, the amount of information one could possibly extract from it is exactly as limited as the amount of information we can currently extract from the universe as a whole at any given time. In other words, just like a video-game rendering engine doesn’t need to render the textures for surfaces outside the player’s view, the simulator doesn’t need to process quantum states for particles not being currently analyzed, relying instead on rough approximations.
Therefore, even if the person was immersed after having lived in the real world for some time, it’s theoretically possible – albeit certainly not currently – to simulate something indistinguishable from reality as far as the senses are concerned. If the person was immersed from birth, well, then we can basically define the rules of the game as we see fit, right? It’s not like you’d notice there’s anything missing anyway.
This sort of design limitation could even be blamed – treading into sci-fi territory here – for the famous wavefunction collapse related effect experienced when a beam/wave of light is observed. Our world simulation follows our attention and only raises the resolution, so to speak, when we actually look at something.
This rant feels like the kind of thing I should have talked about after watching the first (and only) Matrix movie, but what the hell…