期刊
PHYSICAL REVIEW A
卷 79, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.79.032304
关键词
quantum cryptography; quantum entanglement
资金
- Spanish MEC [FIS2007-60182]
- MKE/IITA [2008-F-035-02]
- Korea Research Foundation [KRF-2008-313-C00185]
- ICREA Funding Source: Custom
- National Research Foundation of Korea [2008-313-C00185] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A counterintuitive result in entanglement theory was shown by Cubitt [Phys. Rev. Lett. 91, 037902 (2003)], namely, that entanglement can be distributed by sending a separable state through a quantum channel. In this work, following an analogy between the entanglement and secret-key distillation scenarios, we derive its classical analog: secrecy can be distributed by sending nonsecret correlations through a private channel. This strengthens the close relation between entanglement and secrecy.
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