Academic Journal
PRIMORDIAL BLACK HOLE PAIR CREATION PROBABILITY IN MODIFIED GRAVITATIONAL THEORY
| العنوان: | PRIMORDIAL BLACK HOLE PAIR CREATION PROBABILITY IN MODIFIED GRAVITATIONAL THEORY |
|---|---|
| المؤلفون: | B. C. Paul, Dilip Paul |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://arxiv.org/pdf/hep-th/0511003v1.pdf. |
| سنة النشر: | 2005 |
| المجموعة: | CiteSeerX |
| مصطلحات موضوعية: | Key Words, Gravitational instanton, primordial black hole, quantum cosmology |
| الوصف: | The probability for quantum creation of an inflationary universe with a pair of black holes is computed in a modified gravitational theory. Considering a gravitational action which includes a cosmological constant (Λ) in addition to α R 2 and δ R −1 terms, the probabilities have been evaluated for two different kinds of spatial sections, one accommodating a pair of black holes and the other without black hole. We adopt a technique prescribed by Bousso and Hawking to calculate the above creation probability in a semiclassical approximation with Hartle-Hawking boundary condition. Depending on the parameters in the action some new and physically interesting instanton solutions are presented here which may play an important role in the creation of the early universe. We note that the probability of creation of a universe with a pair of black holes is strongly suppressed with a positive cosmological constant when δ = 4Λ2 3 for α> 0 but it is more probable for α < − 1 6Λ. It is also found that instanton solutions are allowed without a cosmological constant in the theory provided δ < 0. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.268.9273; http://arxiv.org/pdf/hep-th/0511003v1.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.268.9273 http://arxiv.org/pdf/hep-th/0511003v1.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.CA260455 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |