Entanglement harvesting in the presence of cavities

So far, entanglement harvesting has been extensively studied in free-space setups. Here, we provide a detailed analytical and numerical analysis of entanglement harvesting in cavities. Specifically, we couple the quantized electromagnetic field to two identical Gaussian detectors located on the symmetry axis of a cylindrical cavity via Gaussian switching. Our numerical investigations reveal a strong dependence on the cavity length, while showing invariance under changes in the cavity radius in regimes of maximal entanglement. Moreover, we identify different scalings of the detector system parameters for entanglement inside and outside the light cone. Finally, we uncover a strong dependence of the harvested correlations on the cavity-induced parity of the electromagnetic field.