Heyo
Veteran Member
Hello scientists,
I guess this discussion will not have too many participants as I think not many here have interest and knowledge in the topic. @Meow Mix is rarely seen lately and @Polymath257 is the only other who might have thought about this problem. Anyhow, here it is:
We assume the universe was once in a state known as a singularity. This assumption is not falsifiable by observation, it is just a consequence of tracing back the expansion of the universe. We also think that Black Holes have singularities in their centre but that is likely unobservable. We assume that no force exists that can stop the collapse due to gravity. Usually the electromagnetic force stops things from compacting but it is no match to gravity within a Black Hole.
But while the matter in a Black Hole leaves our observable universe, it can come back through the hypothesised Hawking radiation. It is still connected to our reality and our space-time geometry. A very small Black Hole could also evaporate by simply radiating away energy due to Heisenberg's uncertainty principle.
And here comes my question: from a quantum physics view, can there be such a thing as a singularity?
Are not the particles uncertain to be at a single point?
And if we apply that to the universe, is it allowed to assume a time reversal? Could the universe be put back "in the can"?
From my layman's perspective, quantum mechanics would prevent that.
Your thoughts (and corrections to my naïve view of the problem)?
I guess this discussion will not have too many participants as I think not many here have interest and knowledge in the topic. @Meow Mix is rarely seen lately and @Polymath257 is the only other who might have thought about this problem. Anyhow, here it is:
We assume the universe was once in a state known as a singularity. This assumption is not falsifiable by observation, it is just a consequence of tracing back the expansion of the universe. We also think that Black Holes have singularities in their centre but that is likely unobservable. We assume that no force exists that can stop the collapse due to gravity. Usually the electromagnetic force stops things from compacting but it is no match to gravity within a Black Hole.
But while the matter in a Black Hole leaves our observable universe, it can come back through the hypothesised Hawking radiation. It is still connected to our reality and our space-time geometry. A very small Black Hole could also evaporate by simply radiating away energy due to Heisenberg's uncertainty principle.
And here comes my question: from a quantum physics view, can there be such a thing as a singularity?
Are not the particles uncertain to be at a single point?
And if we apply that to the universe, is it allowed to assume a time reversal? Could the universe be put back "in the can"?
From my layman's perspective, quantum mechanics would prevent that.
Your thoughts (and corrections to my naïve view of the problem)?