Re : The need of geodesics in physics



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Topic: Science > Physics
User: "Alfred Einstead"
Date: 10 May 2004 06:15:13 PM
Object: Re : The need of geodesics in physics
From Mark:

The equations of motion for r(t), v(t) are still the same
r'(t) = v(t), v'(t) = -kr(t)/|r(t)|^3

From Shmuel (Seymour J.) Metz (spamtrap@library.lspace.org.invalid):

No,

Yes. Note the comment in particular (you deleted).

Hence Hydrogen SO(4).

This is standard material.

they are [sic] replaced by Schrodinger's Equation

No. They are the SAME as Schroedinger's Equation.
More precisely, it's the more fundamental of the two pictures.
The Schroedinger equation only emerges as a theorem late in the
picture (and by a chain that does not apply in the general
context in a general spacetime manifold); and the picture of
a (pure) state as a Schroedinger wave function is only a
theorem (Stone von Neumann), not an axiom or definition.
Technically, the definition of a state is a linear, positive
function over the C* algebra of observables, which yields
the value 1, when applied to the algebra's unit element. Not
a "wave function".
.

 

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