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Assisted inflation

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Assisted inflation. / Liddle, Andrew R.; Mazumdar, Anupam; Schunck, Franz E.
In: Physical Review D, Vol. 58, No. 6, 061301, 26.08.1998.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Liddle, AR, Mazumdar, A & Schunck, FE 1998, 'Assisted inflation', Physical Review D, vol. 58, no. 6, 061301. https://doi.org/10.1103/PhysRevD.58.061301

APA

Liddle, A. R., Mazumdar, A., & Schunck, F. E. (1998). Assisted inflation. Physical Review D, 58(6), Article 061301. https://doi.org/10.1103/PhysRevD.58.061301

Vancouver

Liddle AR, Mazumdar A, Schunck FE. Assisted inflation. Physical Review D. 1998 Aug 26;58(6):061301. doi: 10.1103/PhysRevD.58.061301

Author

Liddle, Andrew R. ; Mazumdar, Anupam ; Schunck, Franz E. / Assisted inflation. In: Physical Review D. 1998 ; Vol. 58, No. 6.

Bibtex

@article{bde530eb70654485b0752fd009c13e4d,
title = "Assisted inflation",
abstract = "In inflationary scenarios with more than one scalar field, inflation may proceed even if each of the individual fields has a potential too steep for that field to sustain inflation on its own. We show that scalar fields with exponential potentials evolve so as to act cooperatively to assist inflation, by finding solutions in which the energy densities of the different scalar fields evolve in fixed proportion. Such scaling solutions exist for an arbitrary number of scalar fields, with different slopes for the exponential potentials, and we show that these solutions are the unique late-time attractors for the evolution. We determine the density perturbation spectrum produced by such a period of inflation, and show that with multiple scalar fields the spectrum is closer to the scale-invariant than the spectrum that any of the fields would generate individually.",
author = "Liddle, {Andrew R.} and Anupam Mazumdar and Schunck, {Franz E.}",
note = "{\textcopyright} 1998 The American Physical Society 4 pages RevTeX file (uses RevTeX). Trivial changes to match accepted version",
year = "1998",
month = aug,
day = "26",
doi = "10.1103/PhysRevD.58.061301",
language = "English",
volume = "58",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",
number = "6",

}

RIS

TY - JOUR

T1 - Assisted inflation

AU - Liddle, Andrew R.

AU - Mazumdar, Anupam

AU - Schunck, Franz E.

N1 - © 1998 The American Physical Society 4 pages RevTeX file (uses RevTeX). Trivial changes to match accepted version

PY - 1998/8/26

Y1 - 1998/8/26

N2 - In inflationary scenarios with more than one scalar field, inflation may proceed even if each of the individual fields has a potential too steep for that field to sustain inflation on its own. We show that scalar fields with exponential potentials evolve so as to act cooperatively to assist inflation, by finding solutions in which the energy densities of the different scalar fields evolve in fixed proportion. Such scaling solutions exist for an arbitrary number of scalar fields, with different slopes for the exponential potentials, and we show that these solutions are the unique late-time attractors for the evolution. We determine the density perturbation spectrum produced by such a period of inflation, and show that with multiple scalar fields the spectrum is closer to the scale-invariant than the spectrum that any of the fields would generate individually.

AB - In inflationary scenarios with more than one scalar field, inflation may proceed even if each of the individual fields has a potential too steep for that field to sustain inflation on its own. We show that scalar fields with exponential potentials evolve so as to act cooperatively to assist inflation, by finding solutions in which the energy densities of the different scalar fields evolve in fixed proportion. Such scaling solutions exist for an arbitrary number of scalar fields, with different slopes for the exponential potentials, and we show that these solutions are the unique late-time attractors for the evolution. We determine the density perturbation spectrum produced by such a period of inflation, and show that with multiple scalar fields the spectrum is closer to the scale-invariant than the spectrum that any of the fields would generate individually.

U2 - 10.1103/PhysRevD.58.061301

DO - 10.1103/PhysRevD.58.061301

M3 - Journal article

VL - 58

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 6

M1 - 061301

ER -