Efficient High-dimensional Quantum Key Distribution with Hybrid Encoding

Abstract

We propose a schematic setup of quantum key distribution (QKD) with an improved secret key rate based on high-dimensional quantum states. Two degrees-of-freedom of a single photon, orbital angular momentum modes, and multi-path modes, are used to encode secret key information. Its practical implementation consists of optical elements that are within the reach of current technologies such as a multiport interferometer. We show that the proposed feasible protocol has improved the secret key rate with much sophistication compared to the previous 2-dimensional protocol known as the detector-device-independent QKD.

10 pages, 6 figures

References in corpus (14)

• Hacking commercial quantum cryptography systems by tailored bright illumination
• Distillation of secret key and entanglement from quantum states
• Trojan-horse attacks threaten the security of practical quantum cryptography
• Risk analysis of Trojan-horse attacks on practical quantum key distribution systems
• Generation of the Complete Four-dimensional Bell Basis
• Insecurity of detector-device-independent quantum key distribution
• Random Variation of Detector Efficiency: A Countermeasure against Detector Blinding Attacks for Quantum Key Distribution
• Nearly Deterministic Bell Measurement for Multiphoton Qubits and Its Application to Quantum Information Processing
• Detector-Device-Independent Quantum Key Distribution
• Key rate enhancement using qutrit states for uncharacterized quantum key distribution
• Trustworthiness of detectors in quantum key distribution with untrusted detectors
• Safeguarding Quantum Key Distribution through Detection Randomization
• Towards practical high-speed high dimensional quantum key distribution using partial mutual unbiased basis of photon's orbital angular momentum
• Enhanced Bell state measurement for efficient measurement-device-independent quantum key distribution using 3-dimensional quantum states