Edge states in Gravity and Black Hole Physics

Details Edge states in Gravity and Black Hole Physics Edge states in Gravity and Black Hole Physics

1994-12-06

arxiv.org/abs/gr-qc/9412019v2

Nucl.Phys.B461:581-596,1996

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Revtex file, 22 pg. ( refs added , minor typos corrected)

Scientific paper

10.1016/0550-3213(95)00622-2

We show in the context of Einstein gravity that the removal of a spatial region leads to the appearance of an infinite set of observables and their associated edge states localized at its boundary. Such a boundary occurs in certain approaches to the physics of black holes like the one based on the membrane paradigm. The edge states can contribute to black hole entropy in these models. A ``complementarity principle" is also shown to emerge whereby certain ``edge" observables are accessible only to certain observers. The physical significance of edge observables and their states is discussed using their similarities to the corresponding quantities in the quantum Hall effect. The coupling of the edge states to the bulk gravitational field is demonstrated in the context of (2+1) dimensional gravity.

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