Why is no one taught the one concept in quantum physics which denies reality?
It’s called contextuality and it is the essence of quantum physics
This morning I had a bowl of plain Greek yoghurt and toasted muesli for breakfast. I could have had a plain bagel with mashed avocado — or, I could have had nothing at all. But I had the yoghurt and muesli. I know, I know, damn millennials and their hipster breakfast food. But, also, who cares what I ate for breakfast? Well, perhaps the universe does.
Imagine that, after breakfast, I dutifully went to the lab to perform some quantum physics experiments. The results of the experiments obviously depend on what I do in the lab. But, they shouldn’t depend on what happens outside of the lab, right? I mean, why should laser light bouncing around through crystals and mirrors care what the current value of the S&P 500 is, let alone what I had for breakfast?
The conditions under which an experiment is performed are called its context. In practice, the contexts we consider are very limited to a few settings on the devices in the lab. But, maybe the temperature of the room is important. Were the lights on? Was the door open? Especially when things go wrong — which is more often than not — the context is where you look for answers. But some parts of the context are…
