Running spectral index and mode-mode correlation of inflationary perturbations from off-equilibrium effects

Da Shin Lee, Li Zhi Fang, Wolung Lee, Yeo Yie Charng

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We study the off-equilibrium effects of the inflaton field on the dynamics of primordial perturbations in the O(N) model. A self-consistent off-equilibrium formalism is employed to investigate the evolution of the inflationary background field and its fluctuations with the back-reaction effects. We find two observable remains left behind after the off-equilibrium processes: the running spectral index of primordial density perturbations and the correlations between perturbation modes in phase space, which can serve as the imprints to probe the epoch of inflation, and beyond.

Original languageEnglish
Pages (from-to)S203-S207
JournalJournal of the Korean Physical Society
Volume45
Issue numberSUPPL.
Publication statusPublished - 2004 Oct 1

Fingerprint

perturbation
time measurement
formalism
probes

Keywords

  • O(N) model
  • Off-equilibrium effect
  • Primordial perturbation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Running spectral index and mode-mode correlation of inflationary perturbations from off-equilibrium effects. / Lee, Da Shin; Fang, Li Zhi; Lee, Wolung; Charng, Yeo Yie.

In: Journal of the Korean Physical Society, Vol. 45, No. SUPPL., 01.10.2004, p. S203-S207.

Research output: Contribution to journalArticle

@article{a4e5892060454748b4a055dfe23a7cb4,
title = "Running spectral index and mode-mode correlation of inflationary perturbations from off-equilibrium effects",
abstract = "We study the off-equilibrium effects of the inflaton field on the dynamics of primordial perturbations in the O(N) model. A self-consistent off-equilibrium formalism is employed to investigate the evolution of the inflationary background field and its fluctuations with the back-reaction effects. We find two observable remains left behind after the off-equilibrium processes: the running spectral index of primordial density perturbations and the correlations between perturbation modes in phase space, which can serve as the imprints to probe the epoch of inflation, and beyond.",
keywords = "O(N) model, Off-equilibrium effect, Primordial perturbation",
author = "Lee, {Da Shin} and Fang, {Li Zhi} and Wolung Lee and Charng, {Yeo Yie}",
year = "2004",
month = "10",
day = "1",
language = "English",
volume = "45",
pages = "S203--S207",
journal = "Journal of the Korean Physical Society",
issn = "0374-4884",
publisher = "Korean Physical Society",
number = "SUPPL.",

}

TY - JOUR

T1 - Running spectral index and mode-mode correlation of inflationary perturbations from off-equilibrium effects

AU - Lee, Da Shin

AU - Fang, Li Zhi

AU - Lee, Wolung

AU - Charng, Yeo Yie

PY - 2004/10/1

Y1 - 2004/10/1

N2 - We study the off-equilibrium effects of the inflaton field on the dynamics of primordial perturbations in the O(N) model. A self-consistent off-equilibrium formalism is employed to investigate the evolution of the inflationary background field and its fluctuations with the back-reaction effects. We find two observable remains left behind after the off-equilibrium processes: the running spectral index of primordial density perturbations and the correlations between perturbation modes in phase space, which can serve as the imprints to probe the epoch of inflation, and beyond.

AB - We study the off-equilibrium effects of the inflaton field on the dynamics of primordial perturbations in the O(N) model. A self-consistent off-equilibrium formalism is employed to investigate the evolution of the inflationary background field and its fluctuations with the back-reaction effects. We find two observable remains left behind after the off-equilibrium processes: the running spectral index of primordial density perturbations and the correlations between perturbation modes in phase space, which can serve as the imprints to probe the epoch of inflation, and beyond.

KW - O(N) model

KW - Off-equilibrium effect

KW - Primordial perturbation

UR - http://www.scopus.com/inward/record.url?scp=10444232661&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=10444232661&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:10444232661

VL - 45

SP - S203-S207

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

SN - 0374-4884

IS - SUPPL.

ER -