Dong, H (reprint author), Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China.
; Sun Chang-Pu] Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
; [Cai Qing-Yu] Chinese Acad Sci, State Key Lab Magnet Resonances & Atom & Mol Phys, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China
; [Liu Xu-Feng] Peking Univ, Dept Math, Beijing 100871, Peoples R China
For Hawking radiation, treated as a tunneling process, the no-hair theorem of black hole together with the law of energy conservation is utilized to postulate that the tunneling rate only depends on the external qualities (e.g., the mass for the Schwarzschild black hole) and the energy of the radiated particle. This postulate is justified by the WKB approximation for calculating the tunneling probability. Based on this postulate, a general formula for the tunneling probability is derived without referring to the concrete form of black hole metric. This formula implies an intrinsic correlation between the successive processes of the black hole radiation of two or more particles. It also suggests a kind of entropy conservation and thus resolves the puzzle of black hole information loss in some sense.