Holographic dual of the dyonic Reissner-Nordström black hole

It is shown that the hidden conformal symmetry, namely SO(2,2)∼SL(2,R) _L×SL(2,R)_R symmetry, of the nonextremal dyonic Reissner-Nordström black hole can be probed by a charged massless scalar field at low frequencies. The existence of such hidden conformal symmetry suggests that the field theory holographically dual to the four-dimensional Reissner-Nordström black hole indeed should be a two-dimensional conformal field theory (CFT). Although the associated AdS₃ structure does not explicitly appear in the near horizon geometry, the primary parameters of the dual CFT₂ can be exactly obtained without the necessity of embedding the four-dimensional Reissner-Nordström black hole into five-dimensional spacetime. The duality is further supported by comparing the absorption cross sections and real-time correlators obtained from both the CFT and the gravity sides.