Gravitomagnetism in superconductors and compact stars

TL;DR

This paper examines claims of anomalously strong gravitomagnetic fields in superconductors, arguing that such interpretations conflict with established astrophysical understanding of neutron star matter.

Contribution

It critically analyzes the hypothesis that superconductors exhibit enhanced gravitomagnetic effects, highlighting inconsistencies with neutron star physics.

Findings

Superconductors' gravitomagnetic effects are unlikely to be significantly stronger than standard predictions.

Proposed explanations conflict with neutron star superfluid and superconductive states.

Supports the view that observed effects are not due to new gravitational phenomena.

Abstract

There are three experimentally observed effects in rotating superconductors that are so far unexplained. Some authors have tried to interpret such a 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 superfluid state and protons in superconductive one.