Upper bound on the secret key rate distillable from effective quantum correlations with imperfect detectors

Abstract

We provide a simple method to obtain an upper bound on the secret key rate that is particularly suited to analyze practical realizations of quantum key distribution protocols with imperfect devices. We consider the so-called trusted device scenario where Eve cannot modify the actual detection devices employed by Alice and Bob. The upper bound obtained is based on the available measurements results, but it includes the effect of the noise and losses present in the detectors of the legitimate users.

9 pages, 1 figure; suppress sifting effect in the figure, final version

References in corpus (16)

• Mixed State Entanglement and Quantum Error Correction
• Separability Criterion for Density Matrices
• Separability of Mixed States: Necessary and Sufficient Conditions
• Quantifying Entanglement
• Entanglement Measures and Purification Procedures
• Distillation of secret key and entanglement from quantum states
• Optimal eavesdropping in quantum cryptography with six states
• Secure key from bound entanglement
• Entanglement as precondition for secure quantum key distribution
• Separability and entanglement of composite quantum systems
• The Uniqueness Theorem for Entanglement Measures
• Complete hierarchies of efficient approximations to problems in entanglement theory
• The asymptotic relative entropy of entanglement
• Quantum correlations and secret bits
• Detecting two-party quantum correlations in quantum key distribution protocols
• Separable approximations of density matrices of composite quantum systems

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• Quantum entanglement
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• The private classical capacity with a symmetric side channel and its application to quantum cryptography
• Testing Quantum Devices: Practical Entanglement Verification in Bipartite Optical Systems
• Detector decoy quantum key distribution
• One-way quantum key distribution: Simple upper bound on the secret key rate
• Strong quantitative benchmarking of quantum optical devices
• Probing the quantumness of channels with mixed states
• Recent developments in quantum key distribution: theory and practice
• Upper bounds for the secure key rate of decoy state quantum key distribution
• Conditions for degradability of tripartite quantum states