首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Inflationary models with exponential potentials
Institution:1. Department of Radiotherapy, Apollo Multispeciality Hospitals, Kolkata, India;2. Department of Physics, GLA University, Mathura, India;3. Department of Radiotherapy, Manipal Hospitals, Dwarka, New Delhi, India;4. Department of Medical Physics, Apollo Proton Cancer Center, Chennai, India;1. DISAT, Politecnico di Torino, Corso Duca degli Abruzzi 24, I-10129 Turin, Italy;2. Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Torino, Italy;1. Department of Science, Campus of Bijar, University of Kurdistan, Bijar, Iran;2. Faculty of Physics, Shahid Bahonar University, P.O. Box 76175, Kerman, Iran;3. Department of Physics, Faculty of Science, Bu-Ali Sina University, Hamedan, 65178, Iran;1. Institute for Advanced Physics & Mathematics, Zhejiang University of Technology, Hangzhou, 310023, China;2. GCAP-CASPER, Physics Department, Baylor University, Waco, TX 76798-7316, USA;3. Department of Physics, Jimei University, Xiamen, 361021, China;1. Department of Physics, Anhui Normal University, Wuhu, Anhui 241000, China;2. Center for Nonlinear Science and Department of Physics, Ningbo University, Ningbo, Zhejiang 315211, China;3. Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, Changsha, Hunan 410081, China;4. Center for High Energy Physics, Peking University, Beijing 100080, China;5. Institute of Physics, Chiao Tung University, Hsinchu 300, Taiwan
Abstract:In this paper we consider cosmological models containing a self-interacting scalar field possessing a potential of the form V(φ) = Λ exp(−λφ). We investigate the inflationary nature of the model in an (N + 1)-dimensional Friedman space-time as well as in some (3 + 1)-dimensional anisotropic cosmological models. We determine the conditions under which power-law inflation occurs by a detailed stability analysis which determines all possible asymptotic behaviour. We also present some new exact solutions which exhibit the transition to power-law inflation. We determine the range of evolutionary behaviours in each case for all λ ⩾ 0 and find the range of λ values for which power-law inflation occurs. We also discuss how potentials of the exponential type may arise in realistic models of the early universe.
Keywords:
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号