Demonstration of Real-Time Precision Optical Time Synchronization in a True Three-Node Architecture

Abstract

Multi-node optical clock networks will enable future studies of fundamental physics and enable applications in quantum and classical communications as well as navigation and geodesy. We implement the first ever multi-node optical clock network with real-time, relative synchronization over free-space communication channels and precision on the order of 10 fs, realized as a three-node system in a hub-and-spoke topology. In this paper we describe the system and its performance, including a new, independent, out-of-loop verification of two-way optical time synchronization.

References in corpus (5)

• Searching for dilaton dark matter with atomic clocks
• Ultra-stable optical clock with two cold-atom ensembles
• Real-time geopotentiometry with synchronously linked optical lattice clocks
• Precision Metrology Meets Cosmology: Improved Constraints on Ultralight Dark Matter from Atom-Cavity Frequency Comparisons
• SpaceQ -- Direct Detection of Ultralight Dark Matter with Space Quantum Sensors