Search for quantum transducers between electromagnetic and gravitational radiation: A measurement of an upper limit on the transducer conversion efficiency of yttrium barium copper oxide

2003/04/07 by R. Y. Chiao, Chiao, R. Y., W. J. Fitelson +3 · 1 citation
Physics and Astronomy · #Planetary Science and Exploration #Solar and Space Plasma Dynamics #Stellar, planetary, and galactic studies #gr-qc

paper · pdf · doi:10.48550/arxiv.gr-qc/0304026

22 pages, 4 figures

arxiv created 2003/04/07 · arxiv updated 2009/11/30

Abstract

A minimal coupling rule for the coupling of the electron spin to curved spacetime in general relativity suggests the possibility of a coupling between electromagnetic and gravitational radiation mediated by means of a quantum fluid. Thus quantum transducers between these two kinds of radiation fields might exist. We report here on the first attempt at a Hertz-type experiment, in which a high-\rmT_c superconductor (YBCO) was the sample material used as a possible quantum transducer to convert EM into GR microwaves, and a second piece of YBCO in a separate apparatus was used to back-convert GR into EM microwaves. An upper limit on the conversion efficiency of YBCO was measured to be 1.6×10^-5 at liquid nitrogen temperature.

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