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题名: On non-Gaussianities in two-field poly-instanton inflation
作者: Gao, X ;  Shukla, P
刊名: JOURNAL OF HIGH ENERGY PHYSICS
出版日期: 2013
期号: 3, 页码:61
关键词: STRING THEORY ;  CALABI-YAU ;  COMPACTIFICATIONS ;  MODEL ;  ORIENTIFOLDS ;  FLATNESS ;  UNIVERSE ;  HORIZON
学科分类: Physics
通讯作者: Gao, X (reprint author), Werner Heisenberg Inst, Max Planck Inst Phys, Fohringer Ring 6, D-80805 Munich, Germany.
部门归属: [Gao, Xin; Shukla, Pramod] Werner Heisenberg Inst, Max Planck Inst Phys, D-80805 Munich, Germany; [Gao, Xin] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
英文摘要: In the context of Type IIB LARGE volume orientifold setup equipped with poly-instanton corrections, the standard single-field poly-instanton inflation driven by a 'Wilson' divisor volume modulus is generalized by the inclusion of respective axion modulus. This two-tield dynamics results in a "Roulette" type inflation with the presence of several inflationary trajectories which could produce 50 (or more) e-foldings. The evolution of various trajectories along with physical observables are studied. The possibility of generating primordial non-Gaussianities in the slow-roll as well as in the beyond slow-roll region is investigated. We find that although the non-linearity parameters are quite small during the slow-roll regime, the same are significantly enhanced in the beyond slow-roll regime nvestigated up to the end of inflation.
资助者: MPG-CAS Joint Doctoral Promotion Programme; Alexander von Humboldt Foundation
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000317521200061
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15409
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Gao, X,Shukla, P. On non-Gaussianities in two-field poly-instanton inflation[J]. JOURNAL OF HIGH ENERGY PHYSICS,2013(3):61.
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