An underground Sagnac gyroscope with sub-prad/s rotation rate sensitivity: toward General Relativity tests on Earth

Abstract

Measuring in a single location on Earth its angular rotation rate with respect to the celestial frame, with a sensitivity enabling access to the tiny Lense-Thirring effect is an extremely challenging task. GINGERINO is a large frame ring laser gyroscope, operating free running and unattended inside the underground laboratory of the Gran Sasso, Italy. The main geodetic signals, i.e., Annual and Chandler wobbles, daily polar motion and Length of the Day, are recovered from GINGERINO data using standard linear regression methods, demonstrating a sensitivity better than 1 prad/s, therefore close to the requirements for an Earth-based Lense-Thirring test.

arXiv comment7 pages, 5 figures

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• Relativistic frame-dragging and the Hong-Ou-Mandel dip $-$ a primitive to gravitational effects in multi-photon quantum-interference
• A tale of analogies: gravitomagnetic effects, rotating sources, observers and all that
• Multi-scale Constraints on Scalar-Field couplings to Matter: The Geodetic and Frame-Dragging Effects
• Noisy quantum gyroscope
• Overcoming 1 part in $10^9$ of Earth angular rotation rate measurement with the G Wettzell data
• Constraints on ultralight axions, vector gauge bosons, and unparticles from geodetic and frame-dragging measurements
• GINGER
• Comparative analysis of local angular rotation between the Ring Laser Gyroscope GINGERINO and GNSS stations
• Quantum interferometry for rotation sensing in an optical microresonator
• A table-top high-sensitivity gyroscope based on slow light and cavity enhanced photon drag
• Radial distribution gain at 633 nm in a He-Ne RF-excited small bore discharge