Is the dark energy equation of state parameter singular?

Özülker, Emre

doi:10.48550/arxiv.2203.04167

Cited by 5 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the BAO data from intermediate redshifts z ∼ 0.5, viz., galaxy BAO data, are consistent with the Planck-ΛCDM [220]. This picture can be explained with a DE density that decreases significantly with increasing redshift within the redshift range 0.5 z 2.3, possibly, transitioning to the values below zero (implying a pole in the DE EoS parameter [752]), which can give rise to a non-monotonic behavior of H(z). This also finds support from model-independent (non-parametric) reconstructions of DE that consider Ly-α together with other data sets.…”

Section: Cmb Dipole: Intrinsic Versus Kinematic?supporting

confidence: 75%

See 1 more Smart Citation

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Abdalla,

Abellán,

Aboubrahim

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

This White Paper has been prepared to fulfill SNOWMASS 2021 requirements and it extends the material previously summarized in the four Letters of Interest [1][2][3][4]. The Particle Physics Community Planning Exercise (a.k.a. SNOWMASS ) is organized by the Division of Particles and Fields of the American Physical Society, and this is an effort to bring together the community of theoretical physicists and cosmologists and identify promising opportunities to address the questions described.This White Paper was initiated with the aim of identifying the opportunities in the cosmological field for the next decade, and strengthening the coordination of the community. It is addressed to identifying the most promising directions of investigation, and rather than attempting a long review of the current status of the whole field of research, it focuses on the upcoming theoretical opportunities and challenges described. The White Paper is a collaborative effort led by Eleonora Di Valentino and Luis Anchordoqui, and it is organized in the topics listed below, each of them coordinated by the scientists indicated (alphabetical order):

show abstract

Section: Cmb Dipole: Intrinsic Versus Kinematic?supporting

confidence: 75%

“…Here "sgn" is the signum function that reads sgn[x] = −1, 0, 1 for x < 0, x = 0 and x > 0, respectively. This expression indicates if there exists a sign change in the energy density of the gDE (accompanied by a pole in its EoS parameter [752]), it will happen at the redshift…”

Section: Graduated Dark Energy -Ads To Ds Transition In the Late Univ...mentioning

confidence: 99%

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Abdalla,

Abellán,

Aboubrahim

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The occurrence of w-singularities in various other contexts has also been discussed in [103,[144][145][146][147]. Hence while type V singularities deal primarily with a more indirect cosmological parameter, it by no means diminishes its cosmological importance and it does appear in a variety of cosmological expansion scenarios.…”

Section: W Singularities (Type V)mentioning

confidence: 98%

Determinants of Financial Inclusion of Urban Women: Evidence from Ahmedabad, India

Trivedi

2022

SDMIMD

View full text Add to dashboard Cite

<p class="Normal1">One of the utmost active practices is to adopt an inclusive growth policy to achieve economic growth. An inclusive growth means include the excluded population into all benefits. Financial inclusion is a financial upliftment process, to help poor, slum, backward and women to come out from the poverty trap. Financial inclusion means inclusion of excluded population to access formal financial services like savings, borrowings, insurance and pension from formal financial institutions. For constructing strong financial system, it is very necessary to know first that whether sources of financial services are actually reaching to the unreached people; the awareness among people for the formal financial services i.e., financial literacy and inclusion of the excluded population by providing banking services. Among socio-economic problems in India, gender inequality is one of the major affecting problems. A noteworthy access gap has taken place between male and female regardless of significant development in broadening access to formal financial products in the country. The main objectives of this research are to examine nature and extent of accessing major financial inclusion services including Government financial inclusion programs by urban women and to analyze the determinants of financial inclusion for urban women of Ahmedabad district (having highest urban female population in Gujarat). Primary data collection method is used through semi-structured questionnaire. Probit model is constructed to analyze the financial inclusion determinants of urban women of Ahmedabad district. Considered major financial inclusion services are opening bank account, savings, borrowings and insurance. Major finding of this study is that poor urban women are being considered as less benefitted from financial inclusion services, where in-migration, financial literacy and borrowings were found to significantly influence the participation of urban women in financial inclusion programs.</p>

show abstract

“…[7] (see also Refs. [8][9][10][11]), which considers the minimal dynamical deviation from the null inertial mass density (corresponding to the minimal deviation from simple-graduated dark energy) of the form ∝ ρ λ < 0 (where λ is a ratio of two odd integers).…”

Section: Introductionmentioning

confidence: 99%

“…Due to the presence of the logarithmic function of the trace of EMT, similar generation of constant inertial mass density is also possible in f (R, T ) gravity of the form f (R, T ) = R + 2β ln T , proposed in[30], yet it has not been mentioned by the authors [see Eqs (11). and(12)].…”

mentioning

confidence: 99%

Dynamical analysis of logarithmic energy-momentum squared gravity

Acquaviva¹,

Katırcı²

2022

Preprint

View full text Add to dashboard Cite

We perform the dynamical system analysis of a cosmological model in the energy-momentum squared gravity (EMSG) of the form f (Tµν T µν ) = α ln(λTµν T µν ), which is known as energymomentum log gravity (EMLG). In particular, we show that the analytical cosmological solution of EMLG presented by Akarsu et al. (Eur. Phys. J. C 79:846, 2019) is a future attractor. It includes new terms in the right-hand side of the Einstein field equations, which yield constant inertial mass density and provide a dynamical dark energy with a density passing below zero at large redshifts, accommodating a mechanism for screening Λ in the past, suggested for alleviating some cosmological tensions. We show that the model gives rise to an entire class of new stable late-time solutions with H → (Λ + 2α)/3 as a → ∞, where the new term is due to the constant effective inertial mass density that arises from EMLG contribution of dust, whereas H → Λ/3 as a → ∞ in the ΛCDM model. We also show existence of new interesting features and trajectories that are absent in the ΛCDM model.

show abstract

Is the dark energy equation of state parameter singular?

Cited by 5 publications

References 0 publications

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Determinants of Financial Inclusion of Urban Women: Evidence from Ahmedabad, India

Dynamical analysis of logarithmic energy-momentum squared gravity

Contact Info

Product

Resources

About