|
Participant |
Lavrelashvili, George | |||||||
|
Institution |
A.Razmadze Mathematical Institute - I.Javakhishvili Tbilisi State University - 6 Tamarashvili Str. - Tbilisi - Georgia | |||||||
|
Session |
EU1 |
Accepted |
Yes |
Order |
5 |
Time |
15:00 | 15' |
|
Talk |
Oral abstract |
Title |
Negative Mode Problem: Thirty Years Later | |||||
| Coauthors | Lavrelashvili, George | |||||||
|
Abstract |
Negative mode problem in quantum tunneling with gravity was recognized already thirty years ago. In spite of much work done during these years in this direction fully satisfactory solution of the problem is not found yet. Here I briefly review historical development of the subject and at the end discuss recent progress towards solution of the problem. |
|||||||
Pdf file |
|
|||||||
|
Session |
AT3 |
Accepted |
Yes |
Order |
7 |
Time |
17:20 | 25' |
|
Talk |
Oral abstract |
Title |
On Wormholes Creation by Quantum Tunnelling | |||||
| Coauthors | Lavrelashvili, George | |||||||
|
Abstract |
We study the process of quantum tunneling in self-interacting scalar field theory with non-minimal coupling to gravity. We demonstrate that in these theories gravitational instantons can develop a neck -- a feature prohibited in theories with minimal coupling. We show that such instantons with necks lead to the materialization of bubble geometries containing a wormhole region. We also clarify the relationship of neck geometries to violations of the null energy condition. [1] G.Lavrelashvili,``Creation Of Wormholes During The False Vacuum Decay,'' Sov. J. Nucl. Phys. 45 (1987) 185. [2] L.Battarra, G.Lavrelashvili and J.L.Lehners, ``Creation of wormholes by quantum tunnelling in modified gravity theories,'' Phys. Rev. D90 (2014) 12, 124015; arXiv:1407.6026 [hep-th]. |
|||||||
Pdf file |
||||||||