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Using the new physical interpretation of quasinormal modes proposed byMaggiore, we calculate the area and entropy spectra for the 3-dimensioal and5-dimensional large AdS black holes. The spectra are obtained by imposing theBohr-Sommerfeld quantization condition to the adiabatic invariant quantity.With this semiclassical method, we find that the spacings of the area andentropy spectra are equidistant and independent of the AdS radius of the blackhole for both the cases. However, the spacings of the spectra are not the samefor different dimension of space-time. The equidistant area spectra will bebroken when the black hole has other parameters (i.e., charge and angularmomentum) or in a non-Einstein's gravity theory.

Area Spectrum of the Large AdS Black Hole from Quasinormal Modes