Superconducting fluctuation current caused by gravitational drag

TL;DR

This paper explores how gravitational drag from a rotating sphere can induce a measurable fluctuation current in a superconducting ring, potentially aiding the detection of weak gravitational effects.

Contribution

It introduces a theoretical framework for gravitational drag-induced superconducting fluctuation currents using the Landau-Ginzburg model.

Findings

Fluctuation current is greatly enhanced near the superconducting transition temperature.

Current increases with the winding number of the superconducting ring.

Potential for magnifying tiny gravitational effects through superconducting fluctuations.

Abstract

We examine a possible effect of the Lense--Thirring field or gravitational drag by calculating the fluctuation current through a superconducting ring. The gravitational drag is induced by a rotating sphere, on top of which the superconducting ring is placed. The formulation is based on the Landau-Ginzburg free energy functional of linear form. The resultant fluctuation current is shown to be greatly enhanced in the vicinity of the transition temperature, and the current also increases on increasing the winding number of the ring. These effects would provide a modest step towards magnification of tiny gravity.