« on: Today at 02:23:59 »
People often say that Newtonian mechanics is classical physics. So is Maxwellian electromagnetic theory. But they are incompatible with each other.Classic means non-quantum, and not all non-quantum thoeries are compatible with each other. Under classical physics, objects exist even unmeasured. They have a defined state at all times even if it isn't known. The moon is there even when nobody is looking at it, so to speak. Cause comes before effect and information cannot travel faster than light (the latter not being true under Newtonian physics).
None of this is necessarily the case with quantum mechanics. The rules differ from one interpretation to the next, but the empirical measurements do not. If one is to implement a simulation, one must choose an interpretation to simulate. Without that, you'd be implementing a thing without any design.
I've not read most of this thread. It's quite long, but typical of such assertions, there is never an eye given to looking for problems with the proposal. Only positive evidence is presented. This is known as the selection bias fallacy.
Address the problems. Actively seek them, else the idea will be shot down effortlessly when other do.
Have U heard about the Quantum Eraser?This is incorrectly stated. No interpretation of QM suggest either. The choice is: Either there is reverse causality (effect before cause) or there is no state in the absence of measurement. The quantum eraser experiments are actually really hard evidence against a simulation.
Either the photons (can) travel back in time or the universe is implemented in SW
Most simulations work by remembering the state of everything and then computing some future state at some small increment of time. This means choosing a quantum interpretation that has actual state, but such interpretations only work with reverse causality, meaning that you might have simulated the last billion years of physics, but some decision made just now has changed what happened a billion years ago, invalidating everything that has happened since (and yes, they've done experiments that apparently reach at least that far back). The simulation could never make forward progress.
Alternatively one could simulate a local interpretation of quantum mechanics, none of which require reverse causality like that. But the problem is you sacrifice state. If there's no current state, how can the next one be computed?
I cannot think of an algorithm that would simulate either kind of interpretation, and it has been proven that there cannot be one that has both real state and also locality. That means that no classic algorithm can implement quantum mechanics at all, and thus any simulation would have to be at a classic level, which sounds intuitively plausible until one recognizes how much quantum effects effect just about everything we see every day. Without that, rainbows, electronics and nerve cells cannot work. The simulation would need to glean the purpose of every effect and change the physics accordingly.