Uncertainties in experiments on strongly-coupled vacuum field modification of superconductivity and ferromagnetism in solids

J. R. Cooper, L. Forró, A. Jánossy

We discuss recent experiments in which fine particles of the organic superconductor Rb${}_3$C${}_{60}$ or the cuprate superconductor YBa${}_2$Cu${}_3$O${}_{6+x}$ are held in a polystyrene fi…