In the London theory, the wave equation for the vector potential can be rewritten in the form of the Proca equation, producin
In the London theory, the wave equation for the vector potential can be rewritten in the form of the Proca equation, producing an effective photon mass term. This limits the depth of penetration of the field and, for a large enough sample, makes a material perfectly diamagnetic. This behavior is not exhibited by a perfect normal conductor, so its presence is an independent way of observing superconductivity. For ten points, identify this "effect" in which magnetic fields are expelled from superconductors.
In the London theory, the wave equation for the vector potential can be rewritten in the form of the Proca equation, producing an effective photon mass term.
{Meissner}-Ochsenfeld effect