Wavelength Assignment in Hybrid Quantum-Classical Networks
arXiv:1701.08270
Abstract
Optimal wavelength assignment in dense-wavelength-division-multiplexing (DWDM) systems that integrate both quantum and classical channels is studied. In such systems, weak quantum key distribution (QKD) signals travel alongside intense classical signals on the same fiber, where the former can be masked by the background noise induced by the latter. Here, we investigate how optimal wavelength assignment can mitigate this problem. We consider different DWDM structures and various sources of crosstalk and propose several near-optimal wavelength assignment methods that maximize the total secret key rate of the QKD channels. Our numerical results show that the optimum wavelength assignment pattern is commonly consisted of several interspersed quantum and classical bands. Using our proposed techniques, the total secret key rate of quantum channels can substantially be improved, as compared to conventional assignment methods, in the noise dominated regimes. Alternatively, we can maximize the number of QKD users supported under certain key rate constraints.
13 pages, 7 figures
References in corpus (8)
- Satellite-to-ground quantum key distribution
- Ground-to-satellite quantum teleportation
- Measurement device independent quantum key distribution over 404 km optical fibre
- Provably Secure and Practical Quantum Key Distribution over 307 km of Optical Fibre
- Quantum key distribution with entangled photon sources
- Coexistence of high-bit-rate quantum key distribution and data on optical fiber
- Measurement-device-independent quantum key distribution over untrustful metropolitan network
- Coexistence of continuous variable QKD with intense DWDM classical channels