“…As a simple and useful tool, the UDW detector has also received considerable attention in many other areas, including the study of black hole thermodynamics [3,4], Lorentz-violating dispersion relations [5][6][7], finite spacial extensions of the detector and the corresponding regularization schemes [8][9][10][11][12], and the coupling to a fermionic field [13][14][15][16] (for more examples, see recent reviews [17][18][19] and references therein). More recently, UDW detectors have been used extensively in the so-called entanglement harvesting protocol [20], where a pair of UDW detectors coupled to a quantum field can be used to extract the vacuum entanglement of the field, and therefore to probe the nontrivial field properties in a wide range of scenarios [21][22][23][24][25][26][27][28][29][30][31][32][33][34].…”