Gravimetry with Quantum Methods and Quantum Standards

Abstract:

Quantum metrology enables new methods for measuring gravitational quantities. Currently, significant progress in the development of quantum gravimeters, quantum optical clocks, and optical frequency transfer is underway. Quantum gravimeters use a variety of techniques to determine the gravity acceleration acting on clouds of atoms with coherent matter wave phase. We discuss configurations with very small and very large trajectories. Optical atomic clocks and optical frequency transfer allow the determination of gravity potential differences through the gravitational frequency redshift. Recent progress in clock development and in frequency transfer through optical fiber is leading to results with high relevance for geodesy. First experiments for long distance clock comparisons and chronometric leveling are underway. Concepts for geodetic modeling with relativistic quantities are being investigated.