Experimental demonstration of the DPTS QKD protocol over a 170 km fiber link
arXiv:1901.01768 · doi:10.1063/1.5049659
Abstract
Quantum key distribution (QKD) is a promising technology aiming at solving the security problem arising from the advent of quantum computers. While the main theoretical aspects are well developed today, limited performances, in terms of achievable link distance and secret key rate, are preventing the deployment of this technology on a large scale. More recent QKD protocols, which use multiple degrees of freedom for the encoding of the quantum states, allow an enhancement of the system performances. Here, we present the experimental demonstration of the differential phase-time shifting protocol (DPTS) up to 170 km of fiber link. We compare its performance with the well-known coherent one-way (COW) and the differential phase shifting (DPS) protocols, demonstrating a higher secret key rate up to 100 km. Moreover, we propagate a classical signal in the same fiber, proving the compatibility of quantum and classical light.
arXiv comment5 pages, 3 figures, journal paper
References in corpus (20)
- Polynomial-Time Algorithms for Prime Factorization and Discrete Logarithms on a Quantum Computer
- The Security of Practical Quantum Key Distribution
- Decoy State Quantum Key Distribution
- Measurement-device-independent quantum key distribution
- Satellite-to-ground quantum key distribution
- Quantum Key Distribution with High Loss: Toward Global Secure Communication
- Overcoming the rate-distance barrier of quantum key distribution without using quantum repeaters
- Field test of quantum key distribution in the Tokyo QKD Network
- Practical Decoy State for Quantum Key Distribution
- Measurement device independent quantum key distribution over 404 km optical fibre
- Secure quantum key distribution over 421 km of optical fiber
- Provably-Secure and High-Rate Quantum Key Distribution with Time-Bin Qudits
- Fast and simple one-way Quantum Key Distribution
- Ultra-high bandwidth quantum secured data transmission
- Towards Quantum Communication in Free-Space Seawater
- Field test of a practical secure communication network with decoy-state quantum cryptography
- Adaptive Real Time Selection for Quantum Key Distribution in Lossy and Turbulent Free-Space Channels
- Upper Bounds for the Security of two Distributed-Phase Reference Protocols of Quantum Cryptography (Coherent-One-Way and Differential-Phase-Shift)
- Manipulating photon coherence to enhance the security of practical quantum key distribution
- Underwater Quantum Key Distribution in Outdoor Conditions with Twisted Photons
Cited by in corpus (8)
- Advances in Quantum Cryptography
- Efficient time-bin encoding for practical high-dimensional quantum key distribution
- High-dimensional coherent one-way quantum key distribution
- Massively-multiplexed generation of Bell-type entanglement using a quantum memory
- Quantum randomness generation via orbital angular momentum modes crosstalk in a ring-core fiber
- Round-robin differential phase-time-shifting protocol for quantum key distribution: theory and experiment
- Communicating at a record 14.5 bits per received photon through a photon-starved channel
- Thermodynamics and State Preparation in a Two-State System of Light