Time, bangs and quantum physics [was Re: Evidence for Big Bang]

Mark Picton (m.picton@surveying.salford.ac.uk)
25 Apr 1995 11:56:19 GMT

Ken Smith <kensmith@rahul.net> wrote:
> In article <382@landmark.iinet.net.au>,
> Gil Hardwick <gil@landmark.iinet.net.au> wrote:
> >Surely your argument can only refer to the creation of THIS universe
> >we happen to be experiencing at the moment.
> If you are refering to the inflationary model of the universe then the
> evidence that this section is a section of an inflationary universe is
> evidence that there is an inflationary universe.
By 'inflationary' do you mean the 'inflation' that was supposed to
have happened between 10-35 and 10-32 seconds after it all started?

If so then couldn't other universes have been created at the same
time with multiple quantum bubbles inflating (faster than the speed
of light). Then remembering what they were really supposed to be
doing and went back, after 10-32secs to forming the universe as we
know it. Furthermore, if there were multiple universes formed would
they all have the same physical laws?
> > What created the universe
> >in which the big bang had taken place
> There is no need for a universe before this one. For that matter in may
> not even make sense to talk about "before". Time was also created at the
> big bang. Since time is just another one of the dimensions of this
> universe it doesn't really make sense to talk about a value of thime that
> is outside the universe.
I suppose this is an old question but is time really a dimension? I mean
our three spatial dimensions allow forwards and backwards travel but
time can only really be measured in terms of events. Whereas, spatial
dimensions can experienced directly time can only be measured indirectly
with reference to events that have happened in our, subjective, past.
[You can't measure the future!]

> >Further, what created the conditions for the big bang to occur in any
> >event?
> The big bang may have created its own conditions or no condition may be
> needed.
> >To assert that such an explosion JUST HAPPENED out of nothing defies
> >everything we know about explosions. And catastrophes.
> No it doesn't! In quantum physics things can just happen. We know that
> there is no need for a cause for the universe.
If quantum things can just happen (I'm comfortable with this) then why haven't we
seen universes spontaneously popping up during the history of our
own universe. If not what conditions preclude this? My understanding
is that the quantum event that gave rise to the universe was, in some way,
> --
> Ken Smith <kensmith@rahul.net>
Just my tuppeneth worth,

Cheers, Mark