All Questions
7
questions
3
votes
1
answer
132
views
Cosmological perturbations and energy in an expanding universe?
I was reading an interesting book from cosmomogist Viatcheslav Mukhanov Physical Foundations of Cosmology and I had a specific question about it:
It is usually said that energy conservation is ...
- 2,462
0
votes
0
answers
96
views
From a true vacuum to a false vacuum in expanding space?
It is known that spacetime expansion affects many aspects in the universe. For instance, due to this, a global definition of energy conservation is difficult to define.
Could this expansion affect the ...
- 2,462
0
votes
0
answers
19
views
Constant Internal energy of universe and its original source [duplicate]
While I was studying thermodynamics I am confused about internal energy of universe. here a question confused me. "If the internal energy of the universe is constant then where did all energy ...
3
votes
1
answer
199
views
Why is the homogeneity problem actually a problem?
I don't mean to be flippant but I have never understood why the homogeneity in the universe needs.explaining. I have searched other questions on stack exchange and they don't really address the ...
- 1,087
0
votes
1
answer
817
views
Universe spawned from the death of a hyper black hole?
Some Cosmologists have speculated that the Universe formed from the debris ejected when a four-dimensional star collapsed into a black hole a scenario that would help to explain why the cosmos seems ...
- 253
0
votes
2
answers
144
views
How would Boltzmann Brain function with all anti-matter in it? [closed]
Please cope with me, I have been thinking about Boltzmann Brain yesterday and if Quantum fluctuations always happen in pairs of particle and antiparticle since sum of all energy has to be 0.
My brain ...
- 1,125
0
votes
4
answers
3k
views
Boltzmann brain vs Actual universe probability actual calculations [closed]
I have been reading lots of physics lately about how universe came into being. One idea is that universe is long gone (thermal death) and it might not exist the way I feel it and I am a sequence of ...
- 1,125