| Issue |
EPL
Volume 143, Number 3, August 2023
|
|
|---|---|---|
| Article Number | 39002 | |
| Number of page(s) | 7 | |
| Section | Gravitation, cosmology and astrophysics | |
| DOI | https://doi.org/10.1209/0295-5075/acec95 | |
| Published online | 14 August 2023 | |
From quantum foam to graviton condensation: The Zel'dovich route
1 CERN - Geneva, Switzerland
2 Istituto per le Applicazioni del Calcolo “M. Picone”, CNR - I-00185 Rome, Italy
3 Istituto Italiano di Tecnologia - 00161 Rome, Italy
4 Physics Department, Harvard University - Cambridge, MA, USA
5 INFN, Sezione di Roma Tre - I-00146 Rome, Italy
6 Institute for Systems Biology - Seattle, WA 98109, USA
(a) E-mail: donato.bini@gmail.com (corresponding author)
Received: 18 May 2023
Accepted: 2 August 2023
Based on a previous ansatz by Zel'dovich for the gravitational energy of virtual particle-antiparticle pairs, supplemented with the holographic principle, we estimate the vacuum energy in a fairly reasonable agreement with the experimental values of the cosmological constant. We further highlight a connection between Wheeler's quantum foam and graviton condensation, as contemplated in the quantum N-portrait paradigm, and show that such connection also leads to a satisfactory prediction of the value of the cosmological constant. The above results suggest that the “unnaturally” small value of the cosmological constant may find a quite “natural” explanation once the nonlocal perspective of the large N-portrait gravitational condensation is endorsed.
© 2023 The author(s)
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