GRAVITOMAGNETISM IN SUPERCONDUCTORS AND COMPACT STARS

Abstract

There are three experimentally observed effects in rotating superconductors that are so far unexplained. Some authors have tried to interpret such phenomena as possible new gravitational properties of coherent quantum systems. In particular, they suggest that the gravitomagnetic field of that kind of matter may be many orders of magnitude stronger than the one expected in the standard theory. Here I show that this interpretation would be in conflict with the common belief that neutron stars have neutrons in a superfluid state and protons in a superconductive one.