Tunneling radiation characteristic of the charged particle from the Reissner-Nordstrom-anti de sitter black hole

Applying Parikh's semi-classical quantum tunneling method, the tunneling radiation characteristic of the charged particle from the event horizon of the Reissner-Nordstrom-anti de Sitter black hole is researched. The result shows the derived spectrum is not purely thermal one, but is consistent with the underlying unitary theory, which gives a might explanation to the information loss paradox and is the correct amendment to the Hawking radiation.