Experimental Phase-Matching Quantum Cryptographic Conferencing in Symmetric and Asymmetric Fiber Channels
arXiv:2601.17819 · doi:10.1103/mlgs-g354
Abstract
Quantum cryptographic conferencing (QCC) allows multiple parties to establish common secure keys in quantum networks with information-theoretic security. However, the secure transmission distances of current QCC implementations are still limited to the metropolitan areas. Here, we experimentally demonstrate the three-intensity phase-matching (PM) QCC protocol considering finite-size effects by employing frequency-locking and phase-tracking techniques for three parties. The key distribution capability of the PM QCC protocol is demonstrated in the symmetric fiber channels with the distance from each party to the measurement site up to 100 km. The network adaptability of the PM QCC protocol is demonstrated in asymmetric fiber channels used to simulate fiber channel configurations in real networks. Thus, the feasibility of applying the PM QCC protocol to practical intercity quantum networks with both symmetric and asymmetric channels is verified.
14 pages, 8 figures
References in corpus (34)
- The Quantum Internet
- The Security of Practical Quantum Key Distribution
- Secure quantum key distribution with realistic devices
- Field test of quantum key distribution in the Tokyo QKD Network
- Experimental quantum key distribution beyond the repeaterless secret key capacity
- A trusted-node-free eight-user metropolitan quantum communication network
- Measurement-device-independent quantum key distribution over untrustful metropolitan network
- Metropolitan all-pass and inter-city quantum communication network
- Long-Distance Measurement-Device-Independent Multiparty Quantum Communication
- Multi-partite entanglement speeds up quantum key distribution in networks
- Quantum Conference Key Agreement: A Review
- Improved key rate bounds for practical decoy-state quantum key distribution systems
- Experimental demonstration of high-rate measurement-device-independent quantum key distribution over asymmetric channels
- Experimental quantum conference key agreement
- Asymmetric Protocols for Scalable High-Rate Measurement-Device-Independent Quantum Key Distribution Networks
- Conference key agreement with single-photon interference
- Finite-key effects in multi-partite quantum key distribution protocols
- Conference key agreement in a quantum network
- Proof-of-principle experimental demonstration of twin-field quantum key distribution over optical channels with asymmetric losses
- General sending-or-not-sending twin field protocol for quantum key distribution with asymmetric source parameters
- Asymmetric sending or not-sending twin-field quantum key distribution in practice
- Complex Quantum Networks: a Topical Review
- Coherent one-way quantum conference key agreement based on twin field
- Asymmetric twin-field quantum key distribution
- Phase-Matching Quantum Cryptographic Conferencing
- Experiment on scalable multi-user twin-field quantum key distribution network
- Simple Method for Asymmetric Twin-Field Quantum Key Distribution
- Field test of mode-pairing quantum key distribution
- Repeater-like asynchronous measurement-device-independent quantum conference key agreement
- High key rate quantum conference key agreement with unconditional security
- Overcoming fundamental bounds on quantum conference key agreement
- Multi-field quantum conferencing overcomes the network capacity limit
- Experimental Measurement-Device-Independent Quantum Cryptographic Conferencing
- Source-Replacement Model for Phase-Matching Quantum Key Distribution