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Title: Quantum cosmology of Eddington-Born–Infeld gravity fed by a scalar field: The big rip case

Journal Article · · Physics of the Dark Universe
 [1];  [2];  [3];  [4]
  1. Univ. da Beira Interior, Covilha (Portugal)
  2. Univ. da Beira Interior, Covilha (Portugal); Univ. of the Basque Country UPV/EHU, Bilbao (Spain); IKERBASQUE - Basque Foundation for Science, Bilbao (Spain)
  3. National Taiwan Univ., Taipei (Taiwan)
  4. National Taiwan Univ., Taipei (Taiwan); Stanford Univ., Stanford, CA (United States)

We study the quantum avoidance of the big rip singularity in the Eddington-inspired-Born–Infeld (EiBI) phantom model. Instead of considering a simple phantom dark energy component, which is described by a perfect fluid, we consider a more fundamental degree of freedom corresponding to a phantom scalar field with its corresponding potential, which would lead the classical universe to a big rip singularity. We apply a quantum geometrodynamical approach by performing an appropriate Hamiltonian study including an analysis of the constraints of the system. We then derive the Wheeler–DeWitt (WDW) equation and see whether the solutions to the WDW equation satisfy the DeWitt boundary condition. We find that by using a suitable Born–Oppenheimer (BO) approximation, whose validity is proven, the DeWitt condition is satisfied. Furthermore, the big rip singularity is expected to be avoided in the quantum realm.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
IT956-16; FIS2017-85076-P; NSC 97-2112-M-002-026-MY3; AC02-76SF00515
OSTI ID:
1507155
Alternate ID(s):
OSTI ID: 1637177
Journal Information:
Physics of the Dark Universe, Vol. 23, Issue C; ISSN 2212-6864
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 8 works
Citation information provided by
Web of Science

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Cited By (4)

Phantom singularities and their quantum fate: general relativity and beyond—a CANTATA COST action topic journal October 2019
Eddington-inspired-Born–Infeld tensorial instabilities neutralized in a quantum approach journal January 2020
Classical and quantum fate of the little sibling of the big rip in f ( R ) cosmology journal October 2019
Eddington-inspired-Born-Infeld tensorial instabilities neutralized in a quantum approach text January 2019

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