Work

Secure Key from Bound Entanglement

Year: 2005

Type: article

Abstract: We characterize the set of shared quantum states which contain a cryptographically private key. This allows us to recast the theory of privacy as a paradigm closely related to that used in entanglement manipulation. It is shown that one can distill an arbitrarily secure key from bound entangled states. There are also states that have less distillable private keys than the entanglement cost of the state. In general, the amount of distillable key is bounded from above by the relative entropy of entanglement. Relationships between distillability and distinguishability are found for a class of states which have Bell states correlated to separable hiding states. We also describe a technique for finding states exhibiting irreversibility in entanglement distillation.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.94.160502

Authors: Karol Horodecki, Michał Horodecki, Paweł Horodecki, Jonathan Oppenheim

Institutions: University of Gdańsk, Gdańsk University of Technology, Hebrew University of Jerusalem, University of Cambridge

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2015132296

FWCI: 17.11

Cites: 19

Cited by: 340

Related to: 10