I Is dark energy pushing or is it a mirror concept of gravity?

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The discussion centers on the nature of dark energy and its role in the universe's expansion. It is suggested that dark energy has a constant energy density, becoming more significant over time as the density of matter decreases with the universe's expansion. This leads to the conclusion that dark energy is responsible for the observed accelerated expansion, rather than being a mere opposite to gravity. The conversation also touches on the distinction between dark energy and dark matter, emphasizing that they are separate concepts. Ultimately, while evidence supports the existence of dark energy, questions remain about its fundamental nature and origin.
  • #31
@PeterDonis Ok so you say scalar fields can do this, IIRC examples of known scalar fields would be also the B field (static), E field(static) , EM field , gravity , others?
Can the E, B, EM or gravity fields do anything similar to what is happening to the dark/vacuum energy ?
Let me ask one more thing with regards to the topic at hand, normally we associate a field with a source, like the E field and it's source charge or gravity and mass , so the way I imagine in ordinary conditions if I have a object that has charge and mass it is a source for both E field and gravity
What is the source for dark/vacuum energy?
Is the source known or hypothetical as of now?

It seems that unlike matter and the fields associated with matter the source for dark energy seems to be everywhere at once and fundamentally linked to space time.
 
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  • #32
artis said:
IIRC examples of known scalar fields would be also the B field (static), E field(static) , EM field , gravity , others?
None of these are scalar fields. They are vector fields or tensor fields, they "have directions".
artis said:
What is the source for dark/vacuum energy?
It doesn't need one. That's why it is called vacuum energy or cosmological constant or similar. It's there even in vacuum.
 

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