Vacuum Energy: Gravitational Attraction or Repulsion?

  • Context: Graduate 
  • Thread starter Thread starter tenchotomic
  • Start date Start date
  • Tags Tags
    Energy
Click For Summary
SUMMARY

This discussion centers on the nature of vacuum energy and its implications for gravitational forces. Participants explore the paradox of vacuum energy contributing to gravitational repulsion rather than attraction, despite mass-energy equivalence suggesting otherwise. The conversation highlights the need for a deeper theoretical understanding of vacuum energy, which is defined as the background energy present in space devoid of matter. The discussion also emphasizes that vacuum energy is not a misnomer, as it accurately describes this phenomenon.

PREREQUISITES
  • Understanding of mass-energy equivalence principles
  • Familiarity with gravitational forces and their effects
  • Basic knowledge of cosmology and the expanding universe
  • Concept of vacuum energy and its definition
NEXT STEPS
  • Research the implications of vacuum energy on cosmic expansion
  • Study the relationship between vacuum energy and dark energy
  • Examine experimental observations related to gravitational repulsion
  • Explore theoretical frameworks addressing vacuum energy's properties
USEFUL FOR

Physicists, cosmologists, and anyone interested in the fundamental forces of the universe and the role of vacuum energy in gravitational dynamics.

tenchotomic
Messages
36
Reaction score
0
I initially thought of posting this thread in cosmology section but then I realized it's much more general in scope,so Iam posting it here.

Massive bodies attract gravitationally and mass-energy equivalence implies that energy contributes to gravitational attraction.

Then what's so peculiar about vacuum energy that it gives rise to gravitational repulsion instead of attraction?
Is this because of some kind of internal structure it has,which is somehow producing repulsion at the microscopic scale.
Or is it a mere fact that has been observed experimentally(expanding universe etc.) and no theoretical justification yet.

Isn't the term vacuum energy itself a misnomer?
 
Space news on Phys.org
It is not a misnomer. Vacuum (not vacuum =) ) energy is the background energy that exists in space even when there is nothing else in that space (basically a vacuum).

You could read http://en.wikipedia.org/wiki/Vacuum_energy to know more.
 
Bloodthunder said:
It is not a misnomer. Vacuum (not vacuum =) ) energy is the background energy that exists in space even when there is nothing else in that space (basically a vacuum).

You could read http://en.wikipedia.org/wiki/Vacuum_energy to know more.

Oops,sorry for spelling(I didn't realized that).But the wikipedia article hardly explain anything that I asked for.
 
Last edited:

Similar threads

Undergrad Does dark-energy require a source of energy?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad Can gravitational waves gain energy in an expanding FRW spacetime?
  • · Replies 3 ·
Replies
3
Views
2K
High School Why doesn't cosmic inflation violate conservation of energy?
  • · Replies 3 ·
Replies
3
Views
4K
Undergrad Questions about Negative Pressure and Vacuum Energy
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Black hole mass coupled to expansion -- astrophysical source of dark energy?
  • · Replies 134 ·
5
Replies
134
Views
12K
Undergrad Dark Energy as repulsive gravity
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Can Vacuum Energy Alter Our Understanding of Gravity?
  • · Replies 24 ·
Replies
24
Views
4K
Undergrad Internal energy of a comoving volume increasing as space expands?
  • · Replies 20 ·
Replies
20
Views
3K
Graduate Help with Friedman equations and density of energy
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Dark energy = cosmological constant, any problems with that?
  • · Replies 153 ·
6
Replies
153
Views
14K