Inflationary Cosmology in a non-minimal f (R, T) gravity theory using a RT mixing term

被引：7

作者：

Sarkar, Payel ^{[1
]}

Ashmita ^{[1
]}

Das, Prasanta Kumar ^{[1
]}

机构：

[1] Birla Inst Technol & Sci Pilani, Dept Phys, KK Birla Goa Campus,NH-17B,Bypass Rd, Zuarinagar 403726, Goa, India

来源：

PHYSICS OF THE DARK UNIVERSE | 2023年 / 40卷

关键词：

Inflation; Non-minimal coupling; RT-mixing term; Spectral index parameters; UNIVERSE; STABILITY; FLATNESS; HORIZON; MODELS;

D O I：

10.1016/j.dark.2023.101190

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate a class of inflationary models in modified gravity theories which contain a non-minimal coupling between gravity and a scalar field 41 as f (R, T) = R(1 + & alpha; + K4/3T) + K2 & gamma; T where K2 = 8nG where G is Newton's constant. We consider two inflaton potentials of the form (i) V = V0 (1 + ln 41) & lambda;41p and (ii) V0 1+& lambda;41p . For different potential parameters, we have explored the constraints on the modified gravity parameters i.e. (& alpha;, /3, and & gamma;) in the following three cases: (i) /3 = 0, & alpha; = & gamma; = 0, (ii) & alpha; = 0, & gamma; = 0, /3 = 0 and (iii) & gamma; = 0, & alpha; = 0, /3 = 0 for the above two potentials. We find that by the inclusion of RT mixing term, the scalar spectral index ns and tensor-to-scalar ratio r are consistent with the 3 & sigma; limit of the Planck data as well as r < 0.056. & COPY; 2023 Elsevier B.V. All rights reserved.

引用

页数：8

共 73 条

[1] INDUCED-GRAVITY INFLATION [J].

ACCETTA, FS ;

ZOLLER, DJ ;

TURNER, MS .

PHYSICAL REVIEW D, 1985, 31 (12) :3046-3051

[2] BICEP2. II. EXPERIMENT AND THREE-YEAR DATA SET [J].

Ade, P. A. R. ;

Aikin, R. W. ;

Amiri, M. ;

Barkats, D. ;

Benton, S. J. ;

Bischoff, C. A. ;

Bock, J. J. ;

Brevik, J. A. ;

Buder, I. ;

Bullock, E. ;

Davis, G. ;

Day, P. K. ;

Dowell, C. D. ;

Duband, L. ;

Filippini, J. P. ;

Fliescher, S. ;

Golwala, S. R. ;

Halpern, M. ;

Hasselfield, M. ;

Hildebrandt, S. R. ;

Hilton, G. C. ;

Irwin, K. D. ;

Karkare, K. S. ;

Kaufman, J. P. ;

Keating, B. G. ;

Kernasovskiy, S. A. ;

Kovac, J. M. ;

Kuo, C. L. ;

Leitch, E. M. ;

Llombart, N. ;

Lueker, M. ;

Netterfield, C. B. ;

Nguyen, H. T. ;

O'Brient, R. ;

Ogburn, R. W. ;

Orlando, A. ;

Pryke, C. ;

Reintsema, C. D. ;

Richter, S. ;

Schwarz, R. ;

Sheehy, C. D. ;

Staniszewski, Z. K. ;

Story, K. T. ;

Sudiwala, R. V. ;

Teply, G. P. ;

Tolan, J. E. ;

Turner, A. D. ;

Vieregg, A. G. ;

Wilson, P. ;

Wong, C. L. .

ASTROPHYSICAL JOURNAL, 2014, 792 (01)

[3] Planck intermediate results: LVI. Detection of the CMB dipole through modulation of the thermal Sunyaev-Zeldovich effect: Eppur si muove II [J].

Akrami, Y. ;

Ashdown, M. ;

Aumont, J. ;

Baccigalupi, C. ;

Ballardini, M. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartolo, N. ;

Basak, S. ;

Benabed, K. ;

Bernard, J-P ;

Bersanelli, M. ;

Bielewicz, P. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Burigana, C. ;

Calabrese, E. ;

Cardoso, J-F ;

Casaponsa, B. ;

Chiang, H. C. ;

Combet, C. ;

Contreras, D. ;

Crill, B. P. ;

Cuttaia, F. ;

de Bernardis, P. ;

de Rosa, A. ;

de Zotti, G. ;

Delabrouille, J. ;

Di Valentino, E. ;

Diego, J. M. ;

Dore, O. ;

Douspis, M. ;

Dupac, X. ;

Ensslin, T. A. ;

Eriksen, H. K. ;

Fernandez-Cobos, R. ;

Finelli, F. ;

Frailis, M. ;

Franceschi, E. ;

Frolov, A. ;

Galeotta, S. ;

Galli, S. ;

Ganga, K. ;

Genova-Santos, R. T. ;

Gerbino, M. ;

Gonzalez-Nuevo, J. ;

Gorski, K. M. ;

Gruppuso, A. ;

Gudmundsson, J. E. .

ASTRONOMY & ASTROPHYSICS, 2020, 644

[4] A designer approach to f(Q) gravity and cosmological implications [J].

Albuquerque, Ines S. ;

Frusciante, Noemi .

PHYSICS OF THE DARK UNIVERSE, 2022, 35

[5] Dark energy dominance and cosmic acceleration in first-order formalism [J].

Allemandi, G ;

Borowiec, A ;

Francaviglia, M ;

Odintsov, SD .

PHYSICAL REVIEW D, 2005, 72 (06)

[6]

Ashmita P., arXiv

[7]

Bahamonde S, 2022, Arxiv, DOI arXiv:2203.00619

[8]

Baumann D, 2012, Arxiv, DOI arXiv:0907.5424

[9]

Bazeia D., 2021, EUR PHYS J PLUS, V136, P1

[10] Extra force in f(R) modified theories of gravity [J].

Bertolami, Orfeu ;

Bohmer, Christian G. ;

Harko, Tiberiu ;

Lobo, Francisco S. N. .

PHYSICAL REVIEW D, 2007, 75 (10)

← 1 2 3 4 5 6 7 8 →