Anisotropic power-law inflation for a two scalar fields model

Tuan, Q.; Kao, W. F.; Lin, Ing Chen

doi:10.1103/physrevd.83.123002

Cited by 70 publications

(140 citation statements)

References 101 publications

Supporting

Mentioning

127

Contrasting

Order By: Relevance

“…On the other hand, Eq. (4.6) admits at least one positive root if a 1 a 6 < 0 [47][48][49][50][51][52]. Therefore the corresponding anisotropic solution is unstable if a 1 a 6 < 0.…”

Section: Inflationary Phasementioning

confidence: 99%

“…In particular, we would like to obtain a new set of power-law analytic solutions with the form [43,44,[47][48][49][50][51][52]:…”

Section: Anisotropic Power-law Solutionsmentioning

confidence: 99%

“…In order to understand the stability of the set of power-law solutions, we will consider the power-law perturbation of the field equations with δα = A α t m , δσ = A σ t m , and δφ = A φ t m [47][48][49][50][51][52]. Perturbing Eqs.…”

Section: Inflationary Phasementioning

confidence: 99%

See 2 more Smart Citations

Anisotropic power-law inflation for a conformal-violating Maxwell model

Tuan

Kao

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

A set of power-law solutions of a conformalviolating Maxwell model with a non-standard scalar-vector coupling will be shown in this paper. In particular, we are interested in a coupling term of the form X 2n F μν F μν with X denoting the kinetic term of the scalar field. Stability analysis indicates that the new set of anisotropic power-law solutions is unstable during the inflationary phase. The result is consistent with the cosmic no-hair conjecture. We show, however, that a set of stable slowly expanding solutions does exist for a small range of parameters λ and n. Hence a small anisotropy can survive during the slowly expanding phase.

show abstract

“…On the other hand, Eq. (4.6) admits at least one positive root if a 1 a 6 < 0 [47][48][49][50][51][52]. Therefore the corresponding anisotropic solution is unstable if a 1 a 6 < 0.…”

Section: Inflationary Phasementioning

confidence: 99%

“…In particular, we would like to obtain a new set of power-law analytic solutions with the form [43,44,[47][48][49][50][51][52]:…”

Section: Anisotropic Power-law Solutionsmentioning

confidence: 99%

See 1 more Smart Citation

Anisotropic power-law inflation for a conformal-violating Maxwell model

Tuan

Kao

2018

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…In fact there are several discussions about the dynamics of inflation, where supportive roles of gauge fields in realizing accelerated expansion have been observed [31][32][33][34][35][36][37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Inflationary dynamics with a non-Abelian gauge field

Maeda

Yamamoto

2013

Phys. Rev. D

View full text Add to dashboard Cite

We study the dynamics of the universe with a scalar field and an SU(2) non-Abelian Gauge (Yang-Mills) field. The scalar field has an exponential potential and the Yang-Mills field is coupled to the scalar field with an exponential function of the scalar field. We find that the magnetic component of the Yang-Mills field assists acceleration of the cosmic expansion and a power-law inflation becomes possible even if the scalar field potential is steep, which may be expected from some compactification of higher-dimensional unified theories of fundamental interactions. This power-law inflationary solution is a stable attractor in a certain range of coupling parameters. Unlike the case with multiple Abelian gauge fields, the power-law inflationary solution with the dominant electric component is unstable because of the existence of non-linear coupling of the Yang-Mills field. We also analyze the dynamics for the non-inflationary regime, and find several attractor solutions.

show abstract

“…It should be stressed that anisotropic inflation can be naturally realized in the context of supergravity. After the discovery of anisotropic inflation, many cosmological predictions [18][19][20][21][22][23][24][25][26][27][28][29][30][31] and further extension to various models [32][33][34][35][36][37][38][39][40][41][42][43][44][45] have been discussed. Importantly, anisotropic inflation can be tested with observations [46][47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

MHz gravitational waves from short-term anisotropic inflation

Ito

Soda

2016

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

We reveal the universality of short-term anisotropic inflation. As a demonstration, we study inflation with an exponential type gauge kinetic function which is ubiquitous in models obtained by dimensional reduction from higher dimensional fundamental theory. It turns out that an anisotropic inflation universally takes place in the later stage of conventional inflation. Remarkably, we find that primordial gravitational waves with a peak amplitude around 10 −26 ∼ 10 −27 are copiously produced in high-frequency bands 10MHz∼100MHz. If we could detect such gravitational waves in future, we would be able to probe higher dimensional fundamental theory.

show abstract

Anisotropic power-law inflation for a two scalar fields model

Cited by 70 publications

References 101 publications

Anisotropic power-law inflation for a conformal-violating Maxwell model

Anisotropic power-law inflation for a conformal-violating Maxwell model

Inflationary dynamics with a non-Abelian gauge field

MHz gravitational waves from short-term anisotropic inflation

Contact Info

Product

Resources

About