### Abstract

Gravitational backgrounds, such as black holes, AdS, de Sitter and inflationary universes, should be viewed as composite of N soft constituent gravitons. It then follows that such systems are close to quantum criticality of graviton Bose-gas to Bose-liquid transition. Generic properties of the ordinary metric description, including geodesic motion or particle-creation in the background metric, emerge as the large-N limit of quantum scattering of constituent longitudinal gravitons. We show that this picture correctly accounts for physics of large and small black holes in AdS, as well as reproduces well-known inflationary predictions for cosmological parameters. However, it anticipates new effects not captured by the standard semi-classical treatment. In particular, we predict observable corrections that are sensitive to the inflationary history way beyond last 60 e-foldings. We derive an absolute upper bound on the number of e-foldings, beyond which neither de Sitter nor inflationary Universe can be approximated by a semi-classical metric. However, they could in principle persist in a new type of quantum eternity state. We discuss implications of this phenomenon for the cosmological constant problem.

Original language | English (US) |
---|---|

Article number | 023 |

Journal | Journal of Cosmology and Astroparticle Physics |

Volume | 2014 |

Issue number | 1 |

DOIs | |

State | Published - Jan 1 2014 |

### Fingerprint

### Keywords

- cosmological perturbation theory
- dark energy theory
- gravity
- ination

### ASJC Scopus subject areas

- Astronomy and Astrophysics

### Cite this

*Journal of Cosmology and Astroparticle Physics*,

*2014*(1), [023]. https://doi.org/10.1088/1475-7516/2014/01/023

**Quantum compositeness of gravity : Black holes, AdS and inflation.** / Dvali, Gia; Gomez, Cesar.

Research output: Contribution to journal › Article

*Journal of Cosmology and Astroparticle Physics*, vol. 2014, no. 1, 023. https://doi.org/10.1088/1475-7516/2014/01/023

}

TY - JOUR

T1 - Quantum compositeness of gravity

T2 - Black holes, AdS and inflation

AU - Dvali, Gia

AU - Gomez, Cesar

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Gravitational backgrounds, such as black holes, AdS, de Sitter and inflationary universes, should be viewed as composite of N soft constituent gravitons. It then follows that such systems are close to quantum criticality of graviton Bose-gas to Bose-liquid transition. Generic properties of the ordinary metric description, including geodesic motion or particle-creation in the background metric, emerge as the large-N limit of quantum scattering of constituent longitudinal gravitons. We show that this picture correctly accounts for physics of large and small black holes in AdS, as well as reproduces well-known inflationary predictions for cosmological parameters. However, it anticipates new effects not captured by the standard semi-classical treatment. In particular, we predict observable corrections that are sensitive to the inflationary history way beyond last 60 e-foldings. We derive an absolute upper bound on the number of e-foldings, beyond which neither de Sitter nor inflationary Universe can be approximated by a semi-classical metric. However, they could in principle persist in a new type of quantum eternity state. We discuss implications of this phenomenon for the cosmological constant problem.

AB - Gravitational backgrounds, such as black holes, AdS, de Sitter and inflationary universes, should be viewed as composite of N soft constituent gravitons. It then follows that such systems are close to quantum criticality of graviton Bose-gas to Bose-liquid transition. Generic properties of the ordinary metric description, including geodesic motion or particle-creation in the background metric, emerge as the large-N limit of quantum scattering of constituent longitudinal gravitons. We show that this picture correctly accounts for physics of large and small black holes in AdS, as well as reproduces well-known inflationary predictions for cosmological parameters. However, it anticipates new effects not captured by the standard semi-classical treatment. In particular, we predict observable corrections that are sensitive to the inflationary history way beyond last 60 e-foldings. We derive an absolute upper bound on the number of e-foldings, beyond which neither de Sitter nor inflationary Universe can be approximated by a semi-classical metric. However, they could in principle persist in a new type of quantum eternity state. We discuss implications of this phenomenon for the cosmological constant problem.

KW - cosmological perturbation theory

KW - dark energy theory

KW - gravity

KW - ination

UR - http://www.scopus.com/inward/record.url?scp=84893517598&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84893517598&partnerID=8YFLogxK

U2 - 10.1088/1475-7516/2014/01/023

DO - 10.1088/1475-7516/2014/01/023

M3 - Article

AN - SCOPUS:84893517598

VL - 2014

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 1

M1 - 023

ER -