| Interpretation #3: Hidden Variable / pilot-wave / DeBroglie Bohm is by far the simplest and also easiest to understand. It's a shame that it's not the default that's taught. As a very lose analogy, the world is "normal" ( no collapsing or multiple universes or anything). It's simply that every particle leaves a "wake" just like a boat on a lake. That's it. Classical interaction is two boats interacting with each other (crashing into each other, or one pushing the other, or pulling the other like a tugboat). And the only way two boats can affect each other is directly. Quantum interactions are "wakes"/"waves" in the water interacting with boats. One boat can be far enough away, but if it's big enough it's wake can move your boat. This as you'd imagine happens more to smaller lighter boats. And as waves push small boats around they affect where a boat will be when you look to measure them. (Measurements also create a wake) Finally a boat's wake can interfere with another boat's wake. And that can be constructive or destructive interference just like two waves in the water can cancel each other out. Finally a boat on the other side of the lake can affect your boat via it's wake, meaning interactions aren't strictly "local". It's that simple (more or less), it explains all the predictions of QM and yet it's taking forever for Copenhagen to die off and all the absurd questions of collapse and the rest... DeBroglie-Bohm is the only item that makes sense, people are just slow to accept that locality isn't always the case. |
The pilot wave is the entire uncollapsed wave-function, exactly like in many worlds. There is also a particle and instant, universe-wide collapse, neither of which are detectable even in theory. Nothing except the wave function affects the dynamics at all.