Extremal Limits and Black Hole Entropy
MetadataShow full item record
CitationCarroll, Sean, Matthew C. Johnson, and Lisa Randall. 2009. Extremal limits and black hole entropy. Journal of High Energy Physics 2009(11): 109.
AbstractTaking the extremal limit of a non-extremal Reissner-Nordstrom black hole (by externally varying the mass or charge), the region between the inner and outer event horizons experiences an interesting fate--while this region is absent in the extremal case, it does not disappear in the extremal limit but rather approaches a patch of \(AdS_2 \times S^2\). In other words, the approach to extremality is not continuous, as the non-extremal Reissner-Nordstrom solution splits into two spacetimes at extremality: an extremal black hole and a disconnected \(AdS\) space. We suggest that the unusual nature of this limit may help in understanding the entropy of extremal black holes.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:8015828
- FAS Scholarly Articles