Re: are gravitons needed?

From: Old Man (nomail_at_nomail.net)
Date: 09/21/04 

Date: Mon, 20 Sep 2004 19:49:36 -0500

"DAH" <dharder@bnl-dot-gov.no-spam.invalid> wrote in message
news:414f3f59_1@127.0.0.1...
> Uncle Al---"Gravitation is spacetime geometry."
>
> Old Man---"Gravitation puts tensor stresses on space and alters the
> space-time metric"
>
> If GR defines gravitation as an alteration in the geometry of
> spacetime, then why would exchange particles be required to
> produce the force of gravity at the quantum level?

Who says that gravitons are required ? Not Old Man
nor Uncle Al, and not GTR. So far, GTR is empirically
sufficient to all aspects of gravitation.

> Based upon the precepts
> of GR, wouldn't it be more logical to imagine that the gravitational
> field has its quantisation in a fundamental unit of spacetime
> alteration?

Cryogenic neutrons have been observed to fall in Earth's
surface gravity as predicted by non-relativistic QM.
There's no empirical justification for Quantization of the
gravitational field.

[Old Man]

> DAH 9/20/04

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