Generating the curvature perturbation without an inflation.

Physics

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https://doi.org/10.1016/S0370-2693(01)01366-1
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Generating the curvature perturbation without an inflation. / Lyth, David H.; Wands, D.
In: Physics Letters B, Vol. 524, No. 1-2, 03.01.2002, p. 5-14.

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

Harvard

Lyth, DH & Wands, D 2002, 'Generating the curvature perturbation without an inflation.', Physics Letters B, vol. 524, no. 1-2, pp. 5-14. https://doi.org/10.1016/S0370-2693(01)01366-1

APA

Lyth, D. H., & Wands, D. (2002). Generating the curvature perturbation without an inflation. Physics Letters B, 524(1-2), 5-14. https://doi.org/10.1016/S0370-2693(01)01366-1

Vancouver

Lyth DH, Wands D. Generating the curvature perturbation without an inflation. Physics Letters B. 2002 Jan 3;524(1-2):5-14. doi: 10.1016/S0370-2693(01)01366-1

Author

Lyth, David H. ; Wands, D. / Generating the curvature perturbation without an inflation. In: Physics Letters B. 2002 ; Vol. 524, No. 1-2. pp. 5-14.

Bibtex

@article{84d1c4ac6eb34708b01e30f4c3c13627,

title = "Generating the curvature perturbation without an inflation.",

abstract = "We present a mechanism for the origin of the large-scale curvature perturbation in our Universe by the late decay of a massive scalar field, the curvaton. The curvaton is light during a period of cosmological inflation, when it acquires a perturbation with an almost scale-invariant spectrum. This corresponds initially to an isocurvature density perturbation, which generates the curvature perturbation after inflation when the curvaton density becomes a significant fraction of the total. The isocurvature density perturbation disappears if the curvaton completely decays into thermalised radiation. Any residual isocurvature perturbation is 100% correlated with the curvature. The same mechanism can also generate the curvature perturbation in pre-big bang/ekpyrotic models, provided that the curvaton has a suitable non-canonical kinetic term so as to generate a flat spectrum.",

author = "Lyth, {David H.} and D. Wands",

note = "This agenda-setting paper proposed a radical modification of the inflationary scenario, whereby the field responsible for the origin of structure in the universe may lie dormant until a rather late epoch. This 'curvaton' mechanism opened the way to new ways of thinking about the early universe. 353 citations (SPIRES). RAE_import_type : Journal article RAE_uoa_type : Physics",

year = "2002",

month = jan,

day = "3",

doi = "10.1016/S0370-2693(01)01366-1",

language = "English",

volume = "524",

pages = "5--14",

journal = "Physics Letters B",

publisher = "ELSEVIER SCIENCE BV",

number = "1-2",

}

RIS

TY - JOUR

T1 - Generating the curvature perturbation without an inflation.

AU - Lyth, David H.

AU - Wands, D.

N1 - This agenda-setting paper proposed a radical modification of the inflationary scenario, whereby the field responsible for the origin of structure in the universe may lie dormant until a rather late epoch. This 'curvaton' mechanism opened the way to new ways of thinking about the early universe. 353 citations (SPIRES). RAE_import_type : Journal article RAE_uoa_type : Physics

PY - 2002/1/3

Y1 - 2002/1/3

N2 - We present a mechanism for the origin of the large-scale curvature perturbation in our Universe by the late decay of a massive scalar field, the curvaton. The curvaton is light during a period of cosmological inflation, when it acquires a perturbation with an almost scale-invariant spectrum. This corresponds initially to an isocurvature density perturbation, which generates the curvature perturbation after inflation when the curvaton density becomes a significant fraction of the total. The isocurvature density perturbation disappears if the curvaton completely decays into thermalised radiation. Any residual isocurvature perturbation is 100% correlated with the curvature. The same mechanism can also generate the curvature perturbation in pre-big bang/ekpyrotic models, provided that the curvaton has a suitable non-canonical kinetic term so as to generate a flat spectrum.

AB - We present a mechanism for the origin of the large-scale curvature perturbation in our Universe by the late decay of a massive scalar field, the curvaton. The curvaton is light during a period of cosmological inflation, when it acquires a perturbation with an almost scale-invariant spectrum. This corresponds initially to an isocurvature density perturbation, which generates the curvature perturbation after inflation when the curvaton density becomes a significant fraction of the total. The isocurvature density perturbation disappears if the curvaton completely decays into thermalised radiation. Any residual isocurvature perturbation is 100% correlated with the curvature. The same mechanism can also generate the curvature perturbation in pre-big bang/ekpyrotic models, provided that the curvaton has a suitable non-canonical kinetic term so as to generate a flat spectrum.

U2 - 10.1016/S0370-2693(01)01366-1

DO - 10.1016/S0370-2693(01)01366-1

M3 - Journal article

VL - 524

SP - 5

EP - 14

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

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