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Title: Phantom of the Hartle–Hawking instanton: Connecting inflation with dark energy

Journal Article · · European Physical Journal. C, Particles and Fields
 [1];  [2]; ORCiD logo [3]
  1. National Taiwan Univ., Taipei (Taiwan); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Central China Normal Univ., Wuhan (China)
  3. National Taiwan Univ., Taipei (Taiwan)
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If the Hartle–Hawking wave function is the correct boundary condition of our universe, the history of our universe will be well approximated by an instanton. Although this instanton should be classicalized at infinity, as long as we are observing a process of each history, we may detect a non-classicalized part of field combinations. When we apply it to a dark energy model, this non-classicalized part of fields can be well embedded to a quintessence and a phantom model, i.e., a quintom model. Because of the property of complexified instantons, the phantomness will be naturally free from a big rip singularity. This phantomness does not cause perturbative instabilities, as it is an effect emergent from the entire wave function. Lastly, our work may thus provide a theoretical basis for the quintom models, whose equation of state can cross the cosmological constant boundary phenomenologically.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1242368
Journal Information:
European Physical Journal. C, Particles and Fields, Vol. 76, Issue 2; ISSN 1434-6044
Publisher:
SpringerCopyright 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 (6)

Why concave rather than convex inflaton potential? journal October 2018
Suppression of long-wavelength CMB spectrum from the no-boundary initial condition journal November 2018
On the Geometry of No-Boundary Instantons in Loop Quantum Cosmology journal January 2019
Why concave rather than convex inflaton potential? text January 2017
Suppression of long-wavelength CMB spectrum from the no-boundary initial condition text January 2017
On the geometry of no-boundary instantons in loop quantum cosmology preprint January 2018

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