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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.
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
PHYSICAL REVIEW LETTERS
no. 106,
ISSN: 0031-9007 - Language:
- English
- Publication year:
- 2011
- Bibliographic description:
- Dobek K., Karpiński M., Demkowicz-Dobrzański R., Banaszek K., Horodecki P.: Experimental Extraction of Secure Correlations from a Noisy Private State // PHYSICAL REVIEW LETTERS. -Vol. 106, nr. iss. 3 (2011),
- Verified by:
- Gdańsk University of Technology
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