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- W4287019118 abstract "Event synchronisation is a ubiquitous task, with applications ranging from 5G technology to industrial automation and smart power grids. The emergence of quantum communication networks will further increase the demand for precise synchronization in the optical and electronic domains, which implies significant resource overhead, such as the requirement for ultrastable clocks or additional synchronization lasers. Here we show how temporal correlations of energy-time entangled photons may be harnessed for synchronisation in quantum networks. We achieve stable synchronisation jitter <68 ps with as few as 44 correlated detection events per 100-ms data package and demonstrate feasibility in realistic emulated high-loss link scenarios, including atmospheric turbulence. In contrast to previous work, this is accomplished without any external timing reference and only simple crystal oscillators. Our approach replaces the optical and electronic transmission of timing signals with classical communication and computer-aided postprocessing. It can be easily integrated into a wide range of quantum communication networks and could pave the way to future applications in entanglement-based secure time transmission." @default.
- W4287019118 created "2022-07-25" @default.
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- W4287019118 date "2021-08-30" @default.
- W4287019118 modified "2023-09-28" @default.
- W4287019118 title "Clock synchronization with correlated photons" @default.
- W4287019118 doi "https://doi.org/10.48550/arxiv.2108.13466" @default.
- W4287019118 hasPublicationYear "2021" @default.
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