Measurement-device-independent quantum key distribution with nitrogen vacancy centers in diamond

Abstract

Memory-assisted measurement-device-independent quantum key distribution (MA-MDI-QKD) has recently been proposed as a possible intermediate step towards the realization of quantum repeaters. Despite its relaxing some of the requirements on quantum memories, the choice of memory in relation to the layout of the setup and the protocol has a stark effect on our ability to beat existing no-memory systems. Here, we investigate the suitability of nitrogen vacancy (NV) centers, as quantum memories, in MA-MDI-QKD. We particularly show that moderate cavity enhancement is required for NV centers if we want to outperform no-memory QKD systems. Using system parameters mostly achievable by today's state of the art, we then anticipate some total key rate advantage in the distance range between 300 km and 500 km for cavity-enhanced NV centers. Our analysis accounts for major sources of error including the dark current, the channel loss, and the decoherence of the quantum memories.

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Cited by in corpus (10)

• Advances in Quantum Cryptography
• Quantum repeaters: From quantum networks to the quantum internet
• Parameter regimes for a single sequential quantum repeater
• Quantum multiplexing
• Device-independent quantum secret sharing with noise preprocessing and postselection
• Memory-Assisted Quantum Key Distribution with a Single Nitrogen Vacancy Center
• Quantum key distribution over quantum repeaters with encoding: Using Error Detection as an Effective Post-Selection Tool
• Implementing two-photon three-degree-of-freedom hyper-parallel controlled phase flip gate through cavity-assisted interactions
• Quantum repeaters with encoding on nitrogen-vacancy center platforms
• Beating direct transmission bounds for quantum key distribution with a multiple quantum memory station