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We show, using the tunneling method, that Lovelock black holes Hawkingradiate with a perfect blackbody spectrum. This is a new result. Within thesemiclassical (WKB) approximation the temperature of the spectrum is given bythe semiclassical Hawking temperature. Beyond the semiclassical approximationthe thermal nature of the spectrum does not change but the temperatureundergoes some higher order corrections. This is true for both black hole(event) and cosmological horizons. Using the first law of thermodynamics theblack hole entropy is calculated. Specifically the $D$-dimensional static,chargeless black hole solutions which are spherically symmetric andasymptotically flat, AdS or dS are considered. The interesting property ofthese black holes is that their semiclassical entropy does not obey theBekenstein-Hawking area law. It is found that the leading correction to thesemiclassical entropy for these black holes is not logarithmic and next toleading correction is also not inverse of horizon area. This is in contrast tothe black holes in Einstein gravity. The modified result is due to the presenceof Gauss-Bonnet term in the Lovelock Lagrangian. For the limit where thecoupling constant of the Gauss-Bonnet term vanishes one recovers the knowncorrectional terms as expected in Einstein gravity. Finally we relate thecoefficient of the leading (non-logarithmic) correction with the trace anomalyof the stress tensor.

Quantum Tunneling, Blackbody Spectrum and Non-Logarithmic Entropy Correction for Lovelock Black Holes