Build Your Own Universe

[Galphanore]

There are some scientists that are considering building their own universe by creating a big bang from about 10 pounds of matter, and only 10 ^-26 cm across. Assuming that he is correct, would it then expand into a different dimension or am I somewhat justified in my slight apprehension that they're planning to blow us all up?

[Goat]

There are some scientists that are considering building their own universe by creating a big bang from about 10 pounds of matter, and only 10 ^-26 cm across. Assuming that he is correct, would it then expand into a different dimension or am I somewhat justified in my slight apprehension that they're planning to blow us all up?

If they are wrong, but do manage to build one, then we wouldn't be blown up, but rather implode into it. They are trying to make a quantum black hole.

[Galphanore]

There are some scientists that are considering building their own universe by creating a big bang from about 10 pounds of matter, and only 10 ^-26 cm across. Assuming that he is correct, would it then expand into a different dimension or am I somewhat justified in my slight apprehension that they're planning to blow us all up?

If they are wrong, but do manage to build one, then we wouldn't be blown up, but rather implode into it. They are trying to make a quantum black hole.

If they are not wrong then what is the explaination for the expanding universe not replacing our own?

[Goat]

There are some scientists that are considering building their own universe by creating a big bang from about 10 pounds of matter, and only 10 ^-26 cm across. Assuming that he is correct, would it then expand into a different dimension or am I somewhat justified in my slight apprehension that they're planning to blow us all up?

If they are wrong, but do manage to build one, then we wouldn't be blown up, but rather implode into it. They are trying to make a quantum black hole.

Because it can't escape the speed of light.

[Cathar1950]

There are some scientists that are considering building their own universe by creating a big bang from about 10 pounds of matter, and only 10 ^-26 cm across. Assuming that he is correct, would it then expand into a different dimension or am I somewhat justified in my slight apprehension that they're planning to blow us all up?

If they are wrong, but do manage to build one, then we wouldn't be blown up, but rather implode into it. They are trying to make a quantum black hole.

Because it can't escape the speed of light.

Yet.
Laws were made to be broken.

[Galphanore]

There are some scientists that are considering building their own universe by creating a big bang from about 10 pounds of matter, and only 10 ^-26 cm across. Assuming that he is correct, would it then expand into a different dimension or am I somewhat justified in my slight apprehension that they're planning to blow us all up?

If they are wrong, but do manage to build one, then we wouldn't be blown up, but rather implode into it. They are trying to make a quantum black hole.

Because it can't escape the speed of light.

Maybe I've just not got enough understanding of the physics, but how does that effect us being blown up or not?

[QED]

Chaotic inflation is the favoured (most compatible with observation) cosmological model of the day. This model describes our Universe evolving from a quantum fluctuation in some other preexisting region of space-time. By the same token other regions of inflation are therefore possible within our own Universe. This could lead to new universes branching off from our Universe, which itself branched of some other Universe in a continuous process. The most likely point at which branching takes place is via black holes, where each singularity becomes a pinch-point to another set of physical laws and space-time dimensions.

I think the reason we imagine this as being dangerous is because we think of our space-time being unique. From the chaotic inflation link I posted above:

In the chaotic inflation model there are many such inflating bubbles randomly distributed through space. Each bubble is effectively a Universe in its own right. There is no possibility of communicating from one bubble to another, since all communications have to be along the curve because the y-axis is not a real spatial dimension in this graph. Light can only travel a short distance along the curve -- this distance determines the size of our observable Universe. Thus the existence and properties of any other bubbles are more the subject of metaphysics than astrophysics. But if a model makes distinctive predictions about our observable Universe, which are confirmed by precise observations, then the model should be taken seriously even if it predicts unobservable other bubbles.

Does that make you feel any safer?

[Galphanore]

Chaotic inflation is the favoured (most compatible with observation) cosmological model of the day. This model describes our Universe evolving from a quantum fluctuation in some other preexisting region of space-time. By the same token other regions of inflation are therefore possible within our own Universe. This could lead to new universes branching off from our Universe, which itself branched of some other Universe in a continuous process. The most likely point at which branching takes place is via black holes, where each singularity becomes a pinch-point to another set of physical laws and space-time dimensions.

I think the reason we imagine this as being dangerous is because we think of our space-time being unique. From the chaotic inflation link I posted above:

In the chaotic inflation model there are many such inflating bubbles randomly distributed through space. Each bubble is effectively a Universe in its own right. There is no possibility of communicating from one bubble to another, since all communications have to be along the curve because the y-axis is not a real spatial dimension in this graph. Light can only travel a short distance along the curve -- this distance determines the size of our observable Universe. Thus the existence and properties of any other bubbles are more the subject of metaphysics than astrophysics. But if a model makes distinctive predictions about our observable Universe, which are confirmed by precise observations, then the model should be taken seriously even if it predicts unobservable other bubbles.

Does that make you feel any safer?

Pretty much. So if they make this thing and we don't implode would that be a case of verifying the chaotic inflation model?

[juliod]

But what if they drop it? It'll go right through the floor, the basement, and continue to the earth's core, absorbing matter as the matter encounters the (very small) event horizon. Then it will swing back out the other side of the earth, absorbing matter along the way. Then back and forth like a pendulum, each time slicing out a cylindrical core.

Eventually the whole earth will be consumed, expandng the event horizon to a whole 4.4 mm.

DanZ

[Cathar1950]

But what if they drop it? It'll go right through the floor, the basement, and continue to the earth's core, absorbing matter as the matter encounters the (very small) event horizon. Then it will swing back out the other side of the earth, absorbing matter along the way. Then back and forth like a pendulum, each time slicing out a cylindrical core.

Eventually the whole earth will be consumed, expandng the event horizon to a whole 4.4 mm.

DanZ

Well you sure paint a pretty picture Dan.
Now I will dream about it.
I think everything has already happened and we are just remembering it.
Wait that is true. By the time it effects us it has already happened.
It is now. My new bumper sticker. Or should it be now was then?