# Question about quantum physics and possible shortcomings

• galoisjr
In summary, The conversation discusses the use of the Schrodinger equation as a mathematical model in quantum physics and the confusion surrounding the association of a probabilistic function with it. The speaker questions the limitations of using a deterministic model in such a way and seeks insight from others.

#### galoisjr

I was originally an applied math major and about 2 years ago doubled up with a major in physics... Being an applied math major, I have had quite a few courses in mathematical modeling, and there was always something that bugged me about quantum physics. I figured that I would figure it out once I finally took a couple of courses in quantum, and even asked my professor, but this question has yet to be answered for me:

The Schrodinger equation is a mathematical model, or sometimes also referred to as a deterministic model... So why in the world are we associating a probabilistic function with it?

I'm not saying that it's wrong or that it doesn't provide insight, because it most definitely does and obviously has provided quite a revolution in modern technology. However, it does seem rather limiting to use a mathematical model in such a way...

Does anyone understand what I'm saying? Any insight would be greatly appreciated.

galoisjr said:
The Schrodinger equation is a mathematical model, or sometimes also referred to as a deterministic model... So why in the world are we associating a probabilistic function with it?
The Schrödinger equation determines a wave function w/o any uncertainty, probability, indeterminism or something like that. But what we are doing is to interpret this wave function as a probability density (of finding a single particle in a certain region).

galoisjr said:
The Schrodinger equation is a mathematical model, or sometimes also referred to as a deterministic model... So why in the world are we associating a probabilistic function with it?

Because experimental outcomes are probabilistic, in general, as far as we know.