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We establish the link between the thermodynamics and the quantum theory ofblack hole horizons through the construction of the thermodynamic partitionfunction, partly based on some physically plausible arguments, by beginningfrom the description of quantum states of the horizon, considering loop quantumgravity(LQG) as the underlying theory. Although, the effective`thermalized\rq{} form of the partition function has been previously used inthe literature to study the effect of thermal fluctuations of the black holehorizon, nonetheless the direct link to any existing quantum theory (which ishere taken to be LQG), especially a derivation of the partition function fromthe quantum states of the horizon, appears to be hitherto absent. This work isan attempt to bridge this small, but essential, gap that appears to be presentbetween the existing literature of quantum theory and thermodynamics of blackholes. Further, it may be emphasized that this work is {\it only} concernedwith the {\it metric independent} approaches to black hole thermodynamics.

Thermodynamic partition function from quantum theory for black hole horizons in loop quantum gravity