We examine an Unruh-DeWitt particle detector which couples linearly to the scalar density of a massless Dirac ﬁeld on the static cylindrical quotient of the (1+1)-dimensional Minkowski spacetime, allowing the detector’s motion to remain arbitrary and working to leading order in perturbation theory. We show that the detector’s response distinguishes the periodic and antiperiodic spin structures, and the zero mode that is present for periodic spinors contributes to the response by a state-dependent but well deﬁned and controllable amount.
Louko, J., & Toussaint, V. (2018). Unruh-DeWitt Fermion Detector on a (1+1)-Dimensional Cylindrical Spacetime: Arbitrary Worldlines and Inequivalent Spin Structures. In Proceedings of the 14th Marcel Grossmann Meeting on General Relativity. , (2809-2815). https://doi.org/10.1142/9789813226609_0349