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We introduce the notion of fluid approximation of a quantum spherical blackhole in the context of Loop Quantum Gravity. In this limit, the microstates ofthe black hole are intertwiners between "large" representations $s_i$ whichtypically scale as $s_i \sim \sqrt{a_H}$ where $a_H$ denotes the area of thehorizon in Planck units. The punctures with large colors are, for the blackhole horizon, similar to what are the fluid parcels for a classical fluid. Wedub them puncels. Hence, in the fluid limit, the horizon is composed by puncelswhich are themselves interpreted as composed (in the sense of the tensorproduct) by a large number of more fundamental intertwiners. We study thespectrum of the euclidean volume acting on puncels and we compute its quantumfluctuations. Then, we propose an interpretation of black holes radiation basedon the properties of the quantum fluctuations of the euclidean volume operator.We estimate a typical temperature of the black hole and we show that it scalesas the Hawking temperature.

Semi-classical analysis of black holes in Loop Quantum Gravity: Modelling Hawking radiation with volume fluctuations