52 citations · 90 across the 10 of their papers we have counts for
8 papers · 1 filter
Self-stabilized high-dimensional quantum key distribution on a metropolitan free-space link
Karolina Dziwulska, Christopher Spiess, Sarika Mishra +3
Quantum communication technologies capable of operating reliably across heterogeneous optical channels are essential for scalable metropolitan quantum networks. Here we demonstrate…
Frequency subspace encoding for multiplexed quantum secret sharing
Meritxell Cabrejo-Ponce, Christopher Spiess, Carlos Sevilla-Gutiérrez +1
Quantum secret sharing (QSS) is a multi-party quantum communication protocol that can be realized with bipartite entanglement and relative phase encoding. Previous implementations…
Ad-hoc hybrid-heterogeneous metropolitan-range quantum key distribution network
Matthias Goy, Jan Krause, Ömer Bayraktar +37
This paper presents the development and implementation of a versatile ad-hoc metropolitan-range Quantum Key Distribution (QKD) network. The approach presented integrates various ty…
Adjustable spatial filter for optimal free-space quantum communication round the clock
Andrej Kržič, Nico Döll, Uday Chandrashekara +2
Free-space quantum communication in daylight relies crucially on spatial filtering. The optimal filter configuration, however, depends on ever-changing link conditions. To this end…
Clock synchronization with pulsed single photon sources
Christopher Spiess, Fabian Steinlechner
Photonic quantum technology requires precise, time-resolved identification of photodetection events. In distributed quantum networks with spatially separated and drifting time refe…
Towards metropolitan free-space quantum networks
Andrej Kržič, Sakshi Sharma, Christopher Spiess +18
Quantum communication has seen rapid progress towards practical large-scale networks, with quantum key distribution (QKD) spearheading this development. While fibre based systems h…
GHz-Pulsed Source of Entangled Photons for Reconfigurable Quantum Networks
Meritxell Cabrejo Ponce, André Luiz Marques Muniz, Philippe Ancsin +2
Entanglement is a universal resource in quantum networks, yet entangled photon sources are typically custom-made for a specific use case. Versatility, both in terms of state modula…
Clock synchronization with correlated photons
Christopher Spiess, Sebastian Töpfer, Sakshi Sharma +6
Event synchronisation is a ubiquitous task, with applications ranging from 5G technology to industrial automation and smart power grids. The emergence of quantum communication netw…