Re: Doomsday-like argument in cosmology

From: Wei Dai <>
Date: Sat, 17 Aug 2002 17:07:57 -0700

On Sat, Aug 17, 2002 at 04:55:59PM -0700, Brent Meeker wrote:
> I think what the paper says is that when matter/energy have
> thinned out enough so that we have essentially empty space
> again, a de Sitter universe, a vacuum fluctuation can start
> a new universe.

You're not understanding the paper correctly. A de Sitter universe never
thins out to essentially empty space. It thins out to a certain density
and no further (I think because new vacuum energy is created as the
universe expands.) So at any given moment there is always a minimal chance
that the very sparse matter/energy can come together and recreate the
Received on Sat Aug 17 2002 - 17:11:13 PDT

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