科研之友
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摘要
The near-horizon geometry of the extremal four-dimensional Kerr black hole and certain generalizations thereof has an SL (2,R) x U(1) isometry group. Excitations around this geometry can be controlled by imposing appropriate boundary conditions. For certain boundary conditions, the U(1) isometry is enhanced to a Virasoro algebra. Here,we propose a free-field construction of this Virasoro algebra.
- 出版日期2010-8-10
