(De)quantization of black hole charges

Archil Kobakhidze, Bruce H J McKellar
2008 Classical and quantum gravity  
We argue that magnetic and electric charges of the Reissner-Nordstrom black hole are quantized in CP conserving theories. Dequantization phenomenon occurs when CP is broken either explicitly or effectively, and, as a result, pure magnetic black holes are not possible. Two examples illustrating this phenomenon are discussed. One is the electric charge induced by the neutral pion field in a magnetically charged black hole, and another is the electric charge induced due to the massive spin-two field emerging from possible higher curvature terms.
doi:10.1088/0264-9381/25/19/195002 fatcat:3r7fhgmrx5cmtjer42k7fphw7e