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Black-holes are considered to be theoretical laboratories for testing modelsof quantum gravity. It is usually believed that any candidate for quantumgravity must explain the microscopic origin of the Bekenstein-Hawking($S_{_{\rm BH}}$) entropy. In this letter, we argue (i) the requirement for acandidate approach to go beyond $S_{_{\rm BH}}$ and provide generic subleadingcorrections, and (ii) the importance to {\it disentangle} and identify thedegrees of freedom leading to $S_{_{\rm BH}}$ and its subleading corrections.Using the approach of entanglement of modes across the horizon, we show thatthe microscopic degrees of freedom that lead to $S_{_{\rm BH}}$ and subleadingcorrections are different. We further show, using microcanonical and canonicalensemble approaches, that the quantum entanglement predicts generic power-lawcorrections to $S_{_{\rm BH}}$ and that the corrections can be identified withthe kinematical properties of the event-horizon.

Do subleading corrections to Bekenstein-Hawking entropy hold the key to quantum gravity?