Polynomial α-attractors

Author:

Kallosh Renata,Linde Andrei

Abstract

Abstract Inflationary α-attractor models can be naturally implemented in supergravity with hyperbolic geometry. They have stable predictions for observables, such as ns = 1 - 2/Ne , assuming that the potential in terms of the original geometric variables, as well as its derivatives, are not singular at the boundary of the hyperbolic disk, or half-plane. In these models, the potential in the canonically normalized inflaton field φ has a plateau, which is approached exponentially fast at large φ. We call them exponential α-attractors. We present a closely related class of models, where the potential is not singular, but its derivative is singular at the boundary. The resulting inflaton potential is also a plateau potential, but it approaches the plateau polynomially. We call them polynomial α-attractors. Predictions of these two families of attractors completely cover the sweet spot of the Planck/BICEP/Keck data. The exponential ones are on the left, the polynomial are on the right.

Publisher

IOP Publishing

Subject

Astronomy and Astrophysics

Reference41 articles.

1. Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season;Ade;Phys. Rev. Lett.,2021

2. Improved limits on the tensor-to-scalar ratio using BICEP and Planck;Tristram,2021

3. BICEP/Keck and cosmological attractors;Kallosh;JCAP,2021

4. A New Type of Isotropic Cosmological Models Without Singularity;Starobinsky;Phys. Lett. B,1980

5. Chaotic Inflation in Supergravity;Goncharov;Phys. Lett. B,1984

Cited by 21 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Kinetic preheating after α-attractor inflation;Physics Letters B;2024-09

2. Gravitational waves from kinetic preheating;Physical Review D;2024-08-30

3. Palatini F(R,X): A new framework for inflationary attractors;Physics of the Dark Universe;2024-07

4. Development of generic no-scale inflation;Journal of Cosmology and Astroparticle Physics;2024-07-01

5. Testing scale-invariant inflation against cosmological data;Journal of Cosmology and Astroparticle Physics;2024-07-01

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3