General relativity and coherent time (P4)

Project P4 delves into the realm of general relativity to provide a robust theoretical framework for the research group on geodetic time observables.

The project aims to advance our understanding of time in geodesy, offering practical insights into synchronization methodologies and pushing the boundaries of precision measurements. Additionally, it opens avenues for testing General Relativity and exploring the applicability of cutting-edge quantum technologies in geodetic applications.

Objectives are:

• to formulate a comprehensive theory for time comparisons within the context of general relativity in an analytical top-down approach, laying the groundwork for practical synchronization over extended distances,
• to investigate and compare various synchronization methods, with Earth-based and space-based clocks, providing analytical descriptions within specific space-times as benchmark results, as well as general procedures for real world applications,
• to apply the theoretical framework to analyze synchronization procedures, in particular to clock comparison campaigns involving Wettzell, Potsdam, Braunschweig, and ACES on the International Space Station.

Moreover, the project group will design and perform tests of General Relativity and explore the potential advantages of incorporating quantum technologies, such as entangle-ment-based synchronization, and propose new quantum mechanics tests within the geodetic context.
 

Publications:

• Test1
• Test2