| Issue |
EPL
Volume 95, Number 3, August 2011
|
|
|---|---|---|
| Article Number | 30007 | |
| Number of page(s) | 6 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/95/30007 | |
| Published online | 20 July 2011 | |
Emergence of gravity from spinfoams
Institute for Gravitation and the Cosmos, Physics Department, Penn State - University Park, PA 16802-6300, USA
Received:
19
May
2011
Accepted:
20
June
2011
We find a nontrivial regime of spinfoam quantum gravity that reproduces classical Einstein equations. This is the double scaling limit of small Immirzi parameter (gamma), large spins (j) with physical area (gamma times j) constant. In addition to quantum corrections in the Planck constant, we find new corrections in the Immirzi parameter due to the quantum discreteness of spacetime. The result is a strong evidence that the spinfoam covariant quantization of general relativity possesses the correct classical limit.
PACS: 04.60.Pp – Loop quantum gravity, quantum geometry, spin foams / 04.60.Gw – Covariant and sum-over-histories quantization / 04.60.Nc – Lattice and discrete methods
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.