Multipartite entanglement encoded in the photon-number basis by sequential excitation of a three-level system
Alan C. Santos, Christian Schneider, Romain Bachelard, Ana Predojević, C. Antón · Optics Letters · 2023
We propose a general scheme to generate entanglement encoded in the photon-number basis, via a sequential resonant two-photon excitation of a three-level system. We apply it to the specific case of a quantum dot three-level system, which can emit a photon pair through a biexciton-exciton cascade. The state generated in our scheme constitutes a tool for secure communication, as the multipartite correlations present in the produced state may provide an enhanced rate of secret communication with respect to a perfect GHZ state.