Repozytorium publikacji - Politechnika Gdańska

We report experimental generation of a noisy entangled four-photon state that exhibits a separation between the secure key contents and distillable entanglement, a hallmark feature of the recently established quantum theory of private states. The privacy analysis, based on the full tomographic reconstruction of the prepared state, is utilized in a proof-of-principle key generation. The inferiority of distillation-based strategies to extract the key is exposed by an implementation of an entanglement distillation protocol for the produced state.

Autorzy

• K. Dobek,
• M Karpiński,
• R. Demkowicz-Dobrzański,
• K. Banaszek,
• prof. dr hab. Paweł Horodecki link otwiera się w nowej karcie