Test of the isotropy of the one-way speed of light using hydrogen-maser frequency standards.

摘要: A new test of the isotropy one-way velocity light has been performed using NASA's Deep Space Network (DSN). During five rotations Earth, we compared phases two hydrogen-maser frequency standards separated by 21 km an ultrastable fiber optics link. Because unique design experiment, it is possible to derive independent limits on anisotropies that are linear and quadratic in Earth with respect a preferred frame. Assuming have not partially cancelled systematic environmental effects instrumentation, best can be inferred from data \ensuremath{\Delta}c/c3.5\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}7}$ \ensuremath{\Delta}c/c2\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}8}$ for dependencies, respectively, cosmic microwave background. The theoretical interpretation experiment discussed.