Physical significance of generalized boundary conditions: an Unruh-DeWitt detector viewpoint on ${\text{AdS}}_2\times {\mathbb{S}}^2$

Lissa de Souza Campos, Claudio Dappiaggi, Luca Sinibaldi

On ${\text{AdS}}_2\times {\mathbb{S}}^2$, we construct the two-point correlation functions for the ground and thermal states of a real Klein-Gordon field admitting generalized $(\gamma ,v)$…