The Path Inetgral and Classical Lagrange

1. Dec 23, 2014

Quarlep

I know that The path Integral becames classical Lagrange (Classic Mechanics) how can it be turn it.

2. Dec 23, 2014

atyy

Last edited: Dec 23, 2014
3. Dec 23, 2014

Quarlep

I dont have enough math to understand it

4. Dec 23, 2014

atyy

Roughly the idea is:
We associate a number with every possible path.
In classical mechanics, there is only one correct path.
In quantum mechanics, there is no single correct path, and we sum over all paths. The classical path is the path with the largest contribution to the sum.