All Questions
Tagged with cosmology quantum-mechanics
19
questions
9
votes
4
answers
4k
views
Is heat death reversible by thermal or quantum fluctuations given an infinite time?
I'm new here, so apologies if the question doesn't sound meaningful considering what physics is supposed to answer. I don't have a physics or mathematics background, but I did learn a few things about ...
- 452
2
votes
1
answer
3k
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Are dark energy and zero-point energy the same thing?
According to Quantum Mechanics is it possible that the famous "dark energy" and "zero-point energy" are the same thing that drives the accelerated expansion of the universe or maybe related to each ...
- 905
8
votes
2
answers
5k
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Does the uncertainty principle violate the law of conservation of energy?
What is the scientific view of the beginning of universe? Quantum fluctuation seems to contradict with the law of conservation of energy.
Uncertainty Principle does seem to violate the Law of ...
- 465
7
votes
1
answer
511
views
Does zero point energy really contribute to the cosmological constant?
The zero point energy is usually supposed to contribute to the cosmological constant. And the mismatch between the small cosmological constant compared with the huge zero point energy is deemed as one ...
- 4,452
4
votes
1
answer
2k
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Particles entangled after the big bang
Is that true that the big bang caused the quantum entanglement of all the particles of the universe so every particle is entangled to each other particle of the universe?
- 145
0
votes
1
answer
98
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Is the set of reachable states of an indeterministic universe sensitive to its initial conditions?
Suppose two universes with the same amount of mass-energy and evolving according to the same natural laws, but having different initial conditions. Is the set of states that are reachable by the ...
0
votes
2
answers
655
views
A simple explanation of the Born rule?
The probability that an initial quantum state $|\psi_i\rangle$ becomes the final quantum state $|\psi_f\rangle$ is given by
\begin{eqnarray}
P(i \rightarrow f) &=& |\langle\psi_f|\psi_i\...
- 5,925
7
votes
0
answers
116
views
How many apparent horizons could the universe have?
I was reading a paper written by Nobel laureate George Smoot, Go with the Flow, Average Holographic Universe, which assumes the holographic principle as true and conjectures that our universe would be ...
- 2,462
4
votes
1
answer
426
views
Spontaneous collapse of the universal wavefunction
How did the Hatley-Hawking wavefunction of the whole universe,
as defined on the minisuperspace of all possible homogeneous and isotropic
three geometries and matter fields, experience a collapse, ...
- 271
3
votes
2
answers
250
views
Can the implications of dark energy be used to bridge the gap between Quantum Mechanics and General Relativity?
Can the findings of the Physics Nobel Laureates of 2011, namely the overpowering existence of dark energy (vacuum energy) have any implications in the quest the combine Quantum Mechanics and General ...
- 433
3
votes
2
answers
389
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Can the vacuum energy be made finite with quantized space
From what I know the reason we have infinite vacuum energy is because according to Quantum Field Theory at every point in space we have something analogous to a harmonic oscillator but since the Zero ...
- 182
3
votes
4
answers
1k
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Do subatomic particles have finite (i.e. non-zero) size?
We know atoms are mostly "made" out of empty space, so the nucleus and all the subatomic particle are very small in compared to the magnitude of the atoms. We also know that atoms are incredibly small,...
- 2,983
2
votes
3
answers
856
views
Do quantum fluctuations cause variations in energy density across space?
Suppose that the early universe was filled with energy uniformly. Would quantum fluctuations cause variations in energy density across space resulting in regions with higher and lower energy density ...
- 455
1
vote
1
answer
485
views
How was electrical charge formed in the Big Bang?
We know that fundamental particles (Quarks, electrons, etc.) were formed a while after the Big Bang. How was their electrical charge (its value and sign) determined? Was electrical charge present in ...
- 1,145
1
vote
1
answer
182
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Can the universe have different ages?
There is a similar question on here, but I figured this focuses on a more specific aspect. My apologies if it is seen as a duplicate. I am not a cosmologist. I do have a background in physics, ...
- 1,062