Torsional instanton effects in quantum gravity

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6208

Full metadata record

DC Field	Value	Language
dc.contributor.author	Kaul, Romesh K.	-
dc.contributor.author	Sengupta, Sandipan	-
dc.date.accessioned	2015-03-26T01:40:00Z	-
dc.date.available	2015-03-26T01:40:00Z	-
dc.date.issued	2014-12-29	-
dc.identifier.citation	Physical Review D, 2014, Vol. 90, p124081	en
dc.identifier.issn	1550-7998	-
dc.identifier.issn	1550-2368(Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/6208	-
dc.description	Open Access	en
dc.description.abstract	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 different Nieh-Yan charges implies a nonperturbative vacuum state. The associated topological vacuum angle can be identified with the Barbero-Immirzi parameter.	en
dc.language.iso	en	en
dc.publisher	American Physical Society	en
dc.relation.uri	http://arxiv.org/abs/1411.4793	en
dc.relation.uri	http://dx.doi.org/10.1103/PhysRevD.90.124081	en
dc.relation.uri	http://adsabs.harvard.edu/abs/2014PhRvD..90l4081K	en
dc.rights	2014 American Physical society	en
dc.title	Torsional instanton effects in quantum gravity	en
dc.type	Article	en
Appears in Collections:	Research Papers (TP)

Files in This Item:

File	Description	Size	Format
2014_PhysRevD_90_124081.pdf	Open Access	161.96 kB	Adobe PDF	View/Open