Experimental extraction of secure correlations from a noisy private state |
| |
Authors: | Dobek K Karpiński M Demkowicz-Dobrzański R Banaszek K Horodecki P |
| |
Institution: | Institute of Physics, Nicolaus Copernicus University, ul Grudziadzka 5/7, 87-100 Toruń, Poland. |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|