Bulk Entropy in Loop Quantum Gravity

Details Bulk Entropy in Loop Quantum Gravity Bulk Entropy in Loop Quantum Gravity

2007-06-07

arxiv.org/abs/0706.0985v1

Nucl.Phys.B794:138-153,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages

Scientific paper

10.1016/j.nuclphysb.2007.10.027

In the framework of loop quantum gravity (LQG), having quantum black holes in mind, we generalize the previous boundary state counting (gr-qc/0508085) to a full bulk state counting. After a suitable gauge fixing we are able to compute the bulk entropy of a bounded region (the "black hole") with fixed boundary. This allows us to study the relationship between the entropy and the boundary area in details and we identify a holographic regime of LQG where the leading order of the entropy scales with the area. We show that in this regime we can fine tune the factor between entropy and area without changing the Immirzi parameter.

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