Entanglement harvesting in the presence of cavities

TL;DR

This paper analyzes how entanglement harvesting between two detectors is affected by the presence of a cylindrical cavity, revealing dependencies on cavity length, parity, and different scalings inside and outside the light cone.

Contribution

It provides the first detailed analytical and numerical study of entanglement harvesting within cavities, highlighting cavity parameter effects on entanglement.

Findings

Strong dependence of entanglement on cavity length

Invariance of entanglement under cavity radius changes in maximal regimes

Different parameter scalings inside and outside the light cone

Abstract

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 adiabatically couple the quantized electromagnetic field to two identical Gaussian detectors located on the symmetry axis of a cylindrical cavity. 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.