کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1842228 | 1527802 | 2008 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Instanton transition in thermal and moduli deformed de Sitter cosmology
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
ریاضیات
فیزیک ریاضی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Instanton transition in thermal and moduli deformed de Sitter cosmology Instanton transition in thermal and moduli deformed de Sitter cosmology](/preview/png/1842228.png)
چکیده انگلیسی
We consider the de Sitter cosmology deformed by the presence of a thermal bath of radiation and/or time-dependent moduli fields. Depending on the parameters, either a first or second-order phase transition can occur. In the first case, an instanton allows a double analytic continuation. It induces a probability to enter the inflationary evolution by tunnel effect from another cosmological solution. The latter starts with a big bang and, in the case the transition does not occur, ends with a big crunch. A temperature duality exchanges the two cosmological branches. In the limit where the pure de Sitter universe is recovered, the tunnel effect reduces to a “creation from nothing”, due to the vanishing of the big bang branch. However, the latter may be viable in some range of the deformation parameter. In the second case, there is a smooth evolution from a big bang to the inflationary phase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics B - Volume 793, Issues 1â2, 11 April 2008, Pages 131-159
Journal: Nuclear Physics B - Volume 793, Issues 1â2, 11 April 2008, Pages 131-159
نویسندگان
Costas Kounnas, Hervé Partouche,