Shagun Kaushal

Asymptotic Decoherence of an Unruh--DeWitt Detector in de Sitter Spacetime: Conformal versus Minimal Coupling

We investigate the loss of coherence of a two-level Unruh--DeWitt detector coupled to massless real scalar fields in $(1+3)$-dimensional de Sitter spacetime. Treating the detector--field interaction perturbatively to second order, we derive analytic expressions for the real asymptotic coherence-decay coefficients for c...