Re: Quantum Physics explains Newtons laws of motion
From: Igor Khavkine (igor.kh_at_gmail.com)
Date: 03/02/05
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Date: Wed, 2 Mar 2005 07:05:05 +0000 (UTC)
On Tue, 01 Mar 2005 20:16:38 +0000, Alex wrote:
> Ogborn and Taylor in:
> Quantum Physics explains Newtons laws of motion.
> http://www.eftaylor.com/pub/OgbornTaylor.pdf
>
> derive Newtons laws of motion from quantum physics and Maupertius' theory
> of least action. This is neat. I cant find a fault with the principle
> behind it. Can anyone else find a problem?
No problem there. It is a standard argument. Every student of classical
mechanics should know of the Lagrangian formulation and the Least Action
principle, which are for most intents and purposes equivalent to the
Newtonian formulation. The linked article presents a the argument that
Feynman's path integral (sum over histories) formulation of quantum
mechanics reduces to Lagrangian mechanics in the classical limit (hbar
-> 0). There are other standard arguments that show the equivalence of
the path integral and the canonical (Schroedinger and Heisenberg)
formulations of quantum mechanics. So no-one should feel left out.
Igor
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