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Possible Gravitational Anomalies in Quantum Materials. Phase 2: Experiment Assembly, Qualification and Test Results

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Final rept. Mar 2004-Sep 2005

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The author recently published a paper, suggesting for the first time that a reported disagreement between experimental measurements and theoretical predictions for the magnetic field in rotating superconductors might arise from an anomalous high-order gravitomagnetic contribution also known as frame dragging or Lense-Thirring effect. In normal matter, the ratio between electromagnetic and gravitational fields is given by the difference in the respective permeabilities. However, magnetic fields generated as a consequence of the quantization of the canonical momentum in a superconductor do not depend on the permeability. Hence, there is the possibility that the ratio between those two fields might be different in a quantum material. Latest theoretical work links the generation of those non-classical gravitomagnetic fields to the ratio between the Cooper-pair mass and the bulk density of the superconductor. This report summarizes the work carried out in Phase II the assembly of the experiment, qualification to make sure that the required sensitivity can be met, and finally the report on the test results using BSCCO and YBCO superconductors as well as Niobium as a dummy at liquid nitrogen temperatures. The measurements show that the resolution level is low enough to test the original conditions defined in Phase I derived from Tates Cooper-pair measurements, however, the resolution is about one order of magnitude above the theoretical predictions for high-temperature superconductors. No gravitational anomalies were found for BSCCO and YBCO down to the facility resolution level. Hence, gravitational fields based on Tates measurement have not been found with high-temperature superconductors. However, the results do not rule out such gravitational anomalies at their theoretically predicted lower values or anomalies using Tates original setup Niobium sup

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  • Electricity and Magnetism
  • Mechanics

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