Vacuum energy versus expansion of the Universe

  • #1
If vacuum energy has a non-zero value, is the vacuum energy density (vacuum energy over a given volume of void space) being reduced over time due to the expansion of the Universe?

If so, is there any consequence on the particle-antiparticle creation/annihiliation process? Will there ever be a time in the ditstant future where the vacuum energy density is so low that some of these processes are not possible anymore?

Thanks for your replies!
 

Answers and Replies

  • #2
Demystifier
Science Advisor
Insights Author
Gold Member
11,515
4,053
If vacuum energy has a non-zero value, is the vacuum energy density (vacuum energy over a given volume of void space) being reduced over time due to the expansion of the Universe?
Observationally, all observations are consistent with constant vacuum energy density. Mathematically, constant vacuum energy density is consistent with covariant conservation of energy-momentum tensor of matter. Conceptually, you can think of it as increase of total (positive) energy of matter at the expense of decrease of total (negative) energy of gravitational field.
 
Last edited:

Related Threads on Vacuum energy versus expansion of the Universe

  • Last Post
Replies
1
Views
544
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
3
Views
3K
Replies
8
Views
1K
  • Last Post
2
Replies
25
Views
921
Replies
7
Views
288
Replies
9
Views
2K
  • Last Post
Replies
0
Views
1K
  • Last Post
Replies
1
Views
1K
Top