quantum decoherence

anonymous asked:

Hey would you mind explaining some of the questions you have about the measurement problem? Not necessarily something that requires an interpretation of how to solve it. Just something that suggests that there isn't even a measurement problem? Not sure if this is making any sense but I generally wanted to know what questions you had on the measurement problem itself. Thanks!

Hmm, it’s almost a philosophy question.

I guess I usually think of the probabilities converting to a defined outcome in terms of the Many-Worlds interpretation. Simply because it’s the easiest to wrap my head around. The idea that both/all things happen but I, as an observer, just happen to be in the universe where this particular thing happened.

But, I don’t necessarily subscribe to the other predictions and consequences of the Many-Worlds theory as a whole. It’s more a useful parable for my mind, than a full theory.

Other times I think of the problem in other terms. OK, we accept that by quantum mechanics there is a non-zero probability that the electron in the outer orbital of the carbon atom in my left thumb will instantaneously move to the other side of the universe. But the non-zero probability that ALL of my atoms will move to the other side of the universe is vastly larger than the timescale of the universe. And, ultimately I can live without that electron. I will not even notice. So tiny things can be quantum and not have any real effect on larger things that are classical.

Still other times I follow a similar thought process to Joos and Zeh’s quantum decoherence. Paraphrasing: “large things observe themselves”.

To be honest, I don’t know. It’s an interesting question, but I don’t spend a lot of time thinking about it. It doesn’t come up very often in my experimental work. I don’t know.

Here is a picture of a duck.