Issue |
EPL
Volume 145, Number 3, February 2024
|
|
---|---|---|
Article Number | 39001 | |
Number of page(s) | 3 | |
Section | Gravitation, cosmology and astrophysics | |
DOI | https://doi.org/10.1209/0295-5075/ad233f | |
Published online | 23 February 2024 |
Variable brane tension and dark energy
School of Basic Sciences, Indian Institute of Technology - Bhubaneswar, India, 752050
Received: 24 September 2023
Accepted: 26 January 2024
In this letter, we show that in a particular braneworld scenario with variable brane tension, we obtain matter acting as dark energy while the gravitational constant G promoted to a scalar field on the brane plays the role of matter (both in the sense that they have an “effective” equation of state equivalent to that of dark energy and matter, respectively). This result is interpreted from the Friedmann equation obtained from our model that exactly matches the standard Friedmann equation of general relativity with a cosmological constant Λ in terms of the aforementioned quantities. The universe is assumed to consist of only matter and dark energy in this model which is a good approximation for our universe.
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