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We define and analyze the fermionic entanglement entropy of a Schwarzschildblack hole horizon for the vacuum state of an observer at infinity. Usingseparation of variables and an integral representation of the Dirac propagator,the entanglement entropy is computed to be a prefactor times the number ofoccupied angular momentum modes on the event horizon.

The Fermionic Entanglement Entropy of the Vacuum State of a Schwarzschild Black Hole Horizon