Quantum enhanced time synchronisation for communication network

Network Time Synchronization as a Quantum Physical Layer Service

“…For the context of future-generation networks, integrating new technologies like quantum information sciences into network nodes opens up the possibility of shifting the synchronization service to the physical layer [10]. Our study focuses on exploring and utilizing the distinctive characteristics of quantum systems, like entanglement, to achieve precise and secure synchronization at the physical layer.…”

A quantum ticking self-oscillator using delayed feedback

“…where we have multiplied the CE by τ , and denote z = λτ, α ′ = ατ, β ′ = βτ . The solutions of equation (6) for the characteristic values of z can be written as z = ℜz + iℑz, which means that the solution to equation ( 5) is x(t) = Exp ℜz τ t Exp i ℑz τ t . The behavior Exp ℜz τ t describes whether x(t) is increasing or decaying based on the sign of ℜz, while latter Exp i ℑz τ t , describes oscillations of x(t).…”

“…Quantum clocks are capable of being quantum entangled-while classical clocks cannot be. Networks of entangled quantum clocks have been proposed to be used for enhanced time standards [5], for network synchronization [6], and for more fundamental investigation of the role of gravity and quantum mechanics [7]. In this paper we will show that a linear quantum self-oscillator without phase diffusion can be achieved by using delayed feedback in optics.…”