  A geometric potential from the kinetic term of a constrained to a curved
hyperplane of space-time quantum superconducting condensate is derived. An
energy conservation relation involving the geometric field at every material
point in the superconductor is demonstrated. At a Josephson junction the energy
conservation relation implies the possibility of transforming electric energy
into geometric field energy, that is, curvature of space-time. Experimental
procedures to verify that the Josephson junction can act as a
voltage-to-curvature converter are discussed.
