2 research outputs found
Two-Way Quantum Time Transfer: A Method for Daytime Space-Earth Links
Remote clock synchronization is crucial for many classical and quantum
network applications. Current state-of-the-art remote clock synchronization
techniques achieve femtosecond-scale clock stability utilizing frequency combs,
which are supplementary to quantum-networking hardware. Demonstrating an
alternative, we synchronize two remote clocks across our freespace testbed
using a method called two-way quantum time transfer (QTT). In one second we
reach picosecond-scale timing precision under very lossy and noisy channel
conditions representative of daytime space-Earth links with commercial
off-the-shelf quantum-photon sources and detection equipment. This work
demonstrates how QTT is potentially relevant for daytime space-Earth quantum
networking and/or providing high-precision secure timing in GPS-denied
environments.Comment: arXiv admin note: text overlap with arXiv:2211.0073