Publication Date:
2014-12-30
Description:
Author(s): Romesh K. Kaul and Sandipan Sengupta We show that in the first-order gravity theory coupled to axions the instanton number of the Giddings-Strominger wormhole can be interpreted as the Nieh-Yan topological index. The axion charge of the baby universes is quantized in terms of the Nieh-Yan integers. Tunneling between universes of differ... [Phys. Rev. D 90, 124081] Published Mon Dec 29, 2014
Keywords:
General Relativity and Gravitation
Print ISSN:
0556-2821
Electronic ISSN:
1089-4918
Topics:
Physics