Quantum discord as a resource for quantum cryptography

Abstract

Quantum discord is the minimal bipartite resource which is needed for a secure quantum key distribution, being a cryptographic primitive equivalent to non-orthogonality. Its role becomes crucial in device-dependent quantum cryptography, where the presence of preparation and detection noise (inaccessible to all parties) may be so strong to prevent the distribution and distillation of entanglement. The necessity of entanglement is re-affirmed in the stronger scenario of device-independent quantum cryptography, where all sources of noise are ascribed to the eavesdropper.

7 pages. Improved version

References in corpus (15)

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Cited by in corpus (83)

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• Theory of channel simulation and bounds for private communication
• Resource Destroying Maps
• Trusted Noise in Continuous-Variable Quantum Key Distribution: a Threat and a Defense
• Composable security for continuous variable quantum key distribution: Trust levels and practical key rates in wired and wireless networks
• Capacities of repeater-assisted quantum communications
• General immunity and superadditivity of two-way Gaussian quantum cryptography
• Modular network for high-rate quantum conferencing
• A pedagogical overview of quantum discord
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• Photonic multipartite entanglement conversion using nonlocal operations
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• Local Quantum Uncertainty in Two-Qubit Separable States: A Case Study
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• Gaussian two-mode attacks in one-way quantum cryptography
• Cryptographic aspects of quantum reading
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• Hierarchy of efficiently computable and faithful lower bounds to quantum discord
• Excessive distribution of quantum entanglement
• Remote sensing and faithful quantum teleportation through non-localized qubits
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• Factorization dynamics between quantum Fisher information and quantum coherence
• Asymmetric broadcasting of quantum correlations
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• Asymptotically Consistent Measures of General Quantum Resources: Discord, Non-Markovianity, and Non-Gaussianity
• Local quantum uncertainty of SU(2) invariant states
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• Multi-linear Monogamy Relations for Three Qubit States
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• Geometric discord: A resource for increments of quantum key distribution through twirling
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• Unfolding system-environment correlation in open quantum systems: Revisiting master equations and the Born approximation
• Thermal state quantum key distribution
• Asymmetric One-Sided Semi-Device-Independent Steerability of Quantum Discordant States
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• Experimental characterization of a non-local convertor for quantum photonic networks
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• Quantum Secrecy in Thermal States III
• Quantum correlations for anonymous metrology
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• Condition for zero and non-zero discord in graph Laplacian quantum states
• Minimum Disturbance Rewards with Maximum Possible Classical Correlations
• Entanglement-breaking channels are a quantum memory resource
• Computing coherence vectors and correlation matrices, with application to quantum discord quantification
• Discord, quantum knowledge and private communications
• Constructing a ball of separable and absolutely separable states for $2\otimes d$ quantum system
• Generating quantum dissonance via local operations
• Geometric Discord of any arbitrary dimensional bipartite system and its application in quantum key distribution
• Hierarchy of quantum correlations in qubit-qutrit axially symmetric states
• Conditional purity and quantum correlation measures in two qubit mixed states
• Geometric measures of quantum nonlocality: characterization, quantification, and comparison by distances and operations
• Contextuality based quantum conferencing
• Characterising two-sided quantum correlations beyond entanglement via metric-adjusted f-correlations
• Distributing quantum correlations through local operations and classical resources
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• Non-commutativity measure of quantum discord
• Correlations in a quantum switch-based heat engine with measurements: A proof-of-principle demonstration
• Realizing quantum advantage without entanglement in single-photon states
• Quantum Correlation Dynamics for an Open Multi Qutrit System
• Strategies for entanglement distribution in optical fiber networks
• Realizing fully reference-frame-independent quantum key distribution by exploiting quantum discord