Experimental Diagnostics of Entanglement Swapping by a Collective Entanglement Test
Experimental Diagnostics of Entanglement Swapping by a Collective Entanglement Test
This paper reports on the experimental diagnostics of an entanglement-swapping protocol by means of collective entanglement witness. Our approach is suitable to detect disturbances occurring in the preparation of quantum states, quantum-communication channels, and imperfect Bell-state projections. More specifically, we demonstrate that our method can distinguish disturbances such as depolarization, …