Quasinormal bulk-edge characters of gravitons in Nariai geometry

Abstract: In this paper, we evaluate the character partition function of gravitons in the Nariai geometry using quasinormal modes. Employing the Denef-Hartnoll-Sachdev (DHS) prescription, we compute the bulk partition function from the spectrum of quasinormal frequencies. We demonstrate that the quasinormal partition function agrees with the bulk one-loop determinant of gravitons on $S^2 \times S^2$, as obtained via the heat kernel method. Furthermore, we isolate the contribution of the edge character from the full one-loop partition function on $S^2 \times S^2$, and provide remarks on the possible origin of this edge contribution in the quasinormal mode framework.