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Results tagged with cosmological-constant
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user 385491
The cosmological constant is the energy density of space, or vacuum energy, that arises in Albert Einstein's field equations of general relativity. It is closely associated to the concept of dark energy, but, according to quantum field theory, it should also account for all the zero-point energies of quantum fields in space.
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Whether vacuum energy gravitate?
Pertubation fields, that are introduced to correct the ill adapted, nearly free Lagrangians for interacting fields, are no invariant parts of the energy-momentum tensor.
Generally, the perturbation ap …
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