Second-order energy-momentum tensor of a scalar field

Inyong Cho; Jinn Ouk Gong; Seung Hun Oh

doi:10.1103/PhysRevD.106.084027

Second-order energy-momentum tensor of a scalar field

Inyong Cho
, Jinn Ouk Gong
, Seung Hun Oh

School of Natural Sciences

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We investigate the second-order effective energy-momentum tensor (2EMT) constructed by the quadratic terms of the linear scalar cosmological perturbations while the universe is dominated by a scalar field. We show that 2EMT is gauge dependent. We then study 2EMT in three (longitudinal, spatially flat, and comoving) gauge conditions in the slow-roll stage of inflation. We find that 2EMT exhibits an effective fluid of w=-1/3 on superhorizon scales in all of those gauge conditions.

Original language	English
Article number	084027
Journal	Physical Review D
Volume	106
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevD.106.084027
State	Published - 15 Oct 2022

Access to Document

10.1103/PhysRevD.106.084027

Cite this

@article{a271df2d12444199a5f56b6e34b928c9,

title = "Second-order energy-momentum tensor of a scalar field",

abstract = "We investigate the second-order effective energy-momentum tensor (2EMT) constructed by the quadratic terms of the linear scalar cosmological perturbations while the universe is dominated by a scalar field. We show that 2EMT is gauge dependent. We then study 2EMT in three (longitudinal, spatially flat, and comoving) gauge conditions in the slow-roll stage of inflation. We find that 2EMT exhibits an effective fluid of w=-1/3 on superhorizon scales in all of those gauge conditions.",

author = "Inyong Cho and Gong, \{Jinn Ouk\} and Oh, \{Seung Hun\}",

note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = oct,

day = "15",

doi = "10.1103/PhysRevD.106.084027",

language = "English",

volume = "106",

journal = "Physical Review D",

issn = "2470-0010",

number = "8",

}

TY - JOUR

T1 - Second-order energy-momentum tensor of a scalar field

AU - Cho, Inyong

AU - Gong, Jinn Ouk

AU - Oh, Seung Hun

PY - 2022/10/15

Y1 - 2022/10/15

N2 - We investigate the second-order effective energy-momentum tensor (2EMT) constructed by the quadratic terms of the linear scalar cosmological perturbations while the universe is dominated by a scalar field. We show that 2EMT is gauge dependent. We then study 2EMT in three (longitudinal, spatially flat, and comoving) gauge conditions in the slow-roll stage of inflation. We find that 2EMT exhibits an effective fluid of w=-1/3 on superhorizon scales in all of those gauge conditions.

AB - We investigate the second-order effective energy-momentum tensor (2EMT) constructed by the quadratic terms of the linear scalar cosmological perturbations while the universe is dominated by a scalar field. We show that 2EMT is gauge dependent. We then study 2EMT in three (longitudinal, spatially flat, and comoving) gauge conditions in the slow-roll stage of inflation. We find that 2EMT exhibits an effective fluid of w=-1/3 on superhorizon scales in all of those gauge conditions.

UR - https://www.scopus.com/pages/publications/85140252194

U2 - 10.1103/PhysRevD.106.084027

DO - 10.1103/PhysRevD.106.084027

M3 - Article

AN - SCOPUS:85140252194

SN - 2470-0010

VL - 106

JO - Physical Review D

JF - Physical Review D

IS - 8

M1 - 084027

ER -

Second-order energy-momentum tensor of a scalar field

Abstract

Access to Document

Other files and links

Fingerprint

Cite this