Islands in the Λ-sea

An alternative cosmological model

Sourish Dutta, Tanmay Vachaspati

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We propose an alternative cosmological model in which our observable Universe is an island in a cosmological constant sea. Initially the Universe is filled with cosmological constant of the currently observed value but is otherwise empty. In this eternal or semieternal de Sitter spacetime, we show that local quantum fluctuations (upheavals) can violate the null energy condition and create islands of matter. The perturbation spectra of quantum fields other than that responsible for the upheaval, are shown to be scale invariant. With further cosmic evolution the island disappears and the local Universe returns to its initial cosmological constant dominated state.

Original languageEnglish (US)
Article number083507
Pages (from-to)1-11
Number of pages11
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume71
Issue number8
DOIs
StatePublished - Apr 15 2005
Externally publishedYes

Fingerprint

Cosmological Models
Cosmological Constant
universe
Alternatives
Quantum Fluctuations
Quantum Fields
Scale Invariant
Violate
Null
Space-time
Perturbation
perturbation
Energy
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics
  • Mathematical Physics

Cite this

Islands in the Λ-sea : An alternative cosmological model. / Dutta, Sourish; Vachaspati, Tanmay.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 71, No. 8, 083507, 15.04.2005, p. 1-11.

Research output: Contribution to journalArticle

@article{b09172dde3db4fb0869af75711f06594,
title = "Islands in the Λ-sea: An alternative cosmological model",
abstract = "We propose an alternative cosmological model in which our observable Universe is an island in a cosmological constant sea. Initially the Universe is filled with cosmological constant of the currently observed value but is otherwise empty. In this eternal or semieternal de Sitter spacetime, we show that local quantum fluctuations (upheavals) can violate the null energy condition and create islands of matter. The perturbation spectra of quantum fields other than that responsible for the upheaval, are shown to be scale invariant. With further cosmic evolution the island disappears and the local Universe returns to its initial cosmological constant dominated state.",
author = "Sourish Dutta and Tanmay Vachaspati",
year = "2005",
month = "4",
day = "15",
doi = "10.1103/PhysRevD.71.083507",
language = "English (US)",
volume = "71",
pages = "1--11",
journal = "Physical review D: Particles and fields",
issn = "1550-7998",
publisher = "American Institute of Physics Publising LLC",
number = "8",

}

TY - JOUR

T1 - Islands in the Λ-sea

T2 - An alternative cosmological model

AU - Dutta, Sourish

AU - Vachaspati, Tanmay

PY - 2005/4/15

Y1 - 2005/4/15

N2 - We propose an alternative cosmological model in which our observable Universe is an island in a cosmological constant sea. Initially the Universe is filled with cosmological constant of the currently observed value but is otherwise empty. In this eternal or semieternal de Sitter spacetime, we show that local quantum fluctuations (upheavals) can violate the null energy condition and create islands of matter. The perturbation spectra of quantum fields other than that responsible for the upheaval, are shown to be scale invariant. With further cosmic evolution the island disappears and the local Universe returns to its initial cosmological constant dominated state.

AB - We propose an alternative cosmological model in which our observable Universe is an island in a cosmological constant sea. Initially the Universe is filled with cosmological constant of the currently observed value but is otherwise empty. In this eternal or semieternal de Sitter spacetime, we show that local quantum fluctuations (upheavals) can violate the null energy condition and create islands of matter. The perturbation spectra of quantum fields other than that responsible for the upheaval, are shown to be scale invariant. With further cosmic evolution the island disappears and the local Universe returns to its initial cosmological constant dominated state.

UR - http://www.scopus.com/inward/record.url?scp=18444399921&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=18444399921&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.71.083507

DO - 10.1103/PhysRevD.71.083507

M3 - Article

VL - 71

SP - 1

EP - 11

JO - Physical review D: Particles and fields

JF - Physical review D: Particles and fields

SN - 1550-7998

IS - 8

M1 - 083507

ER -