Entropy quantization of Schwarzschild-de Sitter black hole

The canonical formalism of a spherically symmetric spacetime has been decomposition with respect to the radial coordinate r in the context of 3+1 split of spacetime. We have set up an effective Lagrangian that plays the role of independent variable couple with metric function. The surface gravity of Schwarzschild-de Sitter black hole has been quantized from the test particle moving around different energy states like Bohr's atomic model. We have quantized the Hawking temperature and entropy of Schwarzschild-de Sitter black hole from quantization of surface gravity. We also have shown that the change of entropy reduced to zero when the boundary shrinks to very small size.