Affine inflation

被引：45

作者：

Azri, Hemza ^{[1
]}

Demir, Durmus ^{[1
]}

机构：

[1] Izmir Inst Technol, Dept Phys, TR-35430 Izmir, Turkey

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 12期

关键词：

CHAOTIC INFLATION; UNIVERSE; PERTURBATIONS; SCENARIO; FLATNESS; HORIZON;

D O I：

10.1103/PhysRevD.95.124007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Affine gravity, a gravity theory based on affine connection with no notion of metric, supports scalar field dynamics only if scalar fields have nonvanishing potential. The nonvanishing vacuum energy ensures that the cosmological constant is nonvanishing. It also ensures that the energy-momentum tensor of vacuum gives the dynamically generated metric tensor. We construct this affine setup and study primordial inflation in it. We study inflationary dynamics in affine gravity and general relativity, comparatively. We show that nonminimally coupled inflaton dynamics can be transformed into minimally coupled ones with a modified potential. We also show that there is one unique frame in affine gravity, as opposed to the Einstein and Jordan frames in general relativity. Future observations with higher accuracy may be able to test affine gravity.

引用

页数：10

共 34 条

[1] Planck 2015 results XIII. Cosmological parameters [J].

Ade, P. A. R. ;

Aghanim, N. ;

Arnaud, M. ;

Ashdown, M. ;

Aumont, J. ;

Baccigalupi, C. ;

Banday, A. J. ;

Barreiro, R. B. ;

Bartlett, J. G. ;

Bartolo, N. ;

Battaner, E. ;

Battye, R. ;

Benabed, K. ;

Benoit, A. ;

Benoit-Levy, A. ;

Bernard, J. -P. ;

Bersanelli, M. ;

Bielewicz, P. ;

Bock, J. J. ;

Bonaldi, A. ;

Bonavera, L. ;

Bond, J. R. ;

Borrill, J. ;

Bouchet, F. R. ;

Boulanger, F. ;

Bucher, M. ;

Burigana, C. ;

Butler, R. C. ;

Calabrese, E. ;

Cardoso, J. -F. ;

Catalano, A. ;

Challinor, A. ;

Chamballu, A. ;

Chary, R. -R. ;

Chiang, H. C. ;

Chluba, J. ;

Christensen, P. R. ;

Church, S. ;

Clements, D. L. ;

Colombi, S. ;

Colombo, L. P. L. ;

Combet, C. ;

Coulais, A. ;

Crill, B. P. ;

Curto, A. ;

Cuttaia, F. ;

Danese, L. ;

Davies, R. D. ;

Davis, R. J. ;

de Bernardis, P. .

ASTRONOMY & ASTROPHYSICS, 2016, 594

[2] COSMOLOGY FOR GRAND UNIFIED THEORIES WITH RADIATIVELY INDUCED SYMMETRY-BREAKING [J].

ALBRECHT, A ;

STEINHARDT, PJ .

PHYSICAL REVIEW LETTERS, 1982, 48 (17) :1220-1223

[3]

Azri H., IN PRESS

[4] Separate Einstein-Eddington spaces and the cosmological constant [J].

Azri, Hemza .

ANNALEN DER PHYSIK, 2016, 528 (05) :404-411

[5] Eddington's gravity in immersed spacetime [J].

Azri, Hemza .

CLASSICAL AND QUANTUM GRAVITY, 2015, 32 (06)

[6] Higgs-Palatini inflation and unitarity [J].

Bauer, Florian ;

Demir, Durmus A. .

PHYSICS LETTERS B, 2011, 698 (05) :425-429

[7] The Standard Model Higgs boson as the inflaton [J].

Bezrukov, Fedor ;

Shaposhnikov, Mikhail .

PHYSICS LETTERS B, 2008, 659 (03) :703-706

[8] Induced gravity and gauge interactions revisited [J].

Broda, Boguslaw ;

Szanecki, Michal .

PHYSICS LETTERS B, 2009, 674 (01) :64-68

[9]

Demir D. A., ARXIV151005570

[10] Vacuum Energy as the Origin of the Gravitational Constant [J].

Demir, Durmus A. .

FOUNDATIONS OF PHYSICS, 2009, 39 (12) :1407-1425

← 1 2 3 4 →