Two-Way Quantum Time Transfer: A Method for Daytime Space-Earth Links

• URL: http://arxiv.org/abs/2307.07371v2
• Date: Tue, 9 Apr 2024 20:03:50 GMT
• Title: Two-Way Quantum Time Transfer: A Method for Daytime Space-Earth Links
• Authors: Randy Lafler, Mark L. Eickhoff, Scott C. Newey, Yamil Nieves Gonzalez, Kurt E. Stoltenburg, J. Frank Camacho, Mark A. Harris, Denis W. Oesch, Adrian J. Lewis, R. Nicholas Lanning,
• Abstract summary: Two-way quantum time transfer is relevant for daytime space-Earth links and software-emulated satellite motion. This work demonstrates how QTT is potentially relevant for daytime space-Earth quantum networking and/or providing high-precision timing in GPS-denied environments.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: High-precision remote clock synchronization is crucial for many classical and quantum network applications. Evaluating options for space-Earth links, we find that traditional solutions may not produce the desired synchronization for low Earth orbits and unnecessarily complicate quantum-networking architectures. Demonstrating an alternative, we use commercial off-the-shelf quantum-photon sources and detection equipment to synchronize two remote clocks across our freespace testbed utilizing a method called two-way quantum time transfer (QTT). We reach picosecond-scale timing precision under very lossy and noisy channel conditions representative of daytime space-Earth links and software-emulated satellite motion. This work demonstrates how QTT is potentially relevant for daytime space-Earth quantum networking and/or providing high-precision timing in GPS-denied environments.

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