Math behind Theoretical Physics

twofish-quant

The problem with "objective realism" is that you run into problems figuring out happens when the observation changes the thing that you are viewing. Which is a *BIG* problem with quantum mechanics.

Moppy

It's not really a problem as such for me.

It just means that you, yourself, are a component of the whole universe, and the whole thing is interdependent on some level. It still doesn't mean that can you ignore the result of observation, or make claims about things you cannot observe. Or am I misunderstanding you?

It does imply the universe is not completely deterministic, but I am OK with that, and it's not any different from what QM says. Also if it's non-deterministic on a scale we can't perceive, that's not really relevant to us if something happens that we can't predictably influence.

Basically I assume that anything huamns can't detect doesn't exist until proven otherwise. Otherwise all unobservable phenomena are equally valid.

And if it is a problem, and this being a science site, I have to ask what you do propose to fix it.

twofish-quant

There are several different interpretations of QM. One of them is the Bohm interpretation in which every particle is interconnected with every other particle in the universe. That didn't bother David Bohm, but it did bother Einstein a great deal.

Except that it's not hard to get QM non-determinism to affect things at macro-scopic scales. There is a problem in dividing the world in "classical" and "quantum" because then you have problems figuring out what to do at the boundaries, and that's an area of active physics research.

I can't do that since I have to deal with "undetectable" objects in my daily life (i.e. money).

No idea. But that's good. Sometimes the job of a theorist is to bring up a problem, with no clue as to how to fix it. The thing about mathematical logic is that it invariably creates a choice. If you assume A, B, and C, D *MUST* be true. If D isn't true, you *MUST* reject either A, B, or C. Some of the best theory papers have been of this form, and if you ask the writer if they reject A, B, or C, then the answer is "I dunno."

rorix_bw

Money is a concept that exists in the minds of the people that understand it. It is observable.

I don't know anything about quantum mechanics but if it is true that classical systems are an emergent property of the quantum, then your life is an illusion (albeit a very persistent one).