Big Bang From What?

[Theland]

Regarding the beginning of the universe 13.8 billion years ago, what is the latest theory for how it began?
Any links I could look at?

[tonyav]

It could all just be a matter of scale.

I to have thought that, douglas. We ( mankind ) managed to split the atom in the 1940's and build an atomic bomb, how about if all those millions of years ago a natural phenomenon caused the atom to split and cause the 'Big Bang' ( on a much much larger scale ).

[Old_Geezer]

I've no issue with the universe being fractal, but to have an atom to split you must first already have a universe with an atom in it.

It seem that "nothing" is unstable. No time passes in a "nothing" for there'snothing to change. So the point at which "it" explodes into "something" has to occur immediately. After that has happened, time can emerge inside the "something", but no time is detected from outside the "something".

[Old_Geezer]

...there's nothing...

This keyboard loves to ignore spaces. Can't catch them all.

[beso]

Theland //If the universe began with the Big Bang then the Big Bang itself required a cause. //

Quantum Mechanics clearly demonstrates that causality is not the fundamental nature of reality. Things happen at random without causes, even the manifestation of whole universes with no cause at all.

[beso]

The Universe exists because Nothing is Impossible.

In infinite nothing would require infinite order.

[Old_Geezer]

But when there's nothing to put into order that's 0×∞ at most, which is possibly very little order.

[jim360]

Technically, Quantum Mechanics still preserves causality. I think you mean determinism, ie the idea that everything can be predicted with certainty if you knew where everything started and had a large enough computer.

[Old_Geezer]

But the causal order of events is not always fixed, but is subject to quantum uncertainty. So it's not particularly straightforward even if the present interpretation is correct.

[jim360]

"But the causal order of events is not always fixed ... "

I'm not sure that's true either. If one event causally precedes another than all observers will agree that it was so, at least within the context of Quantum Field Theory (Quantum Mechanics's bigger brother). So causality is preserved in a formal sense.

[Bazile]

Who gave that BA ?

I didn't choose a BA
That's the problem using mobile

[jim360]

Wrong thread, I think?

[vascop]

Theland, I suggest you watch "Everything and Nothing" two tv programmes by Jim Al-khalili. Probably available on youtube. They show how you CAN get something from nothing.