The Final State of the Thermal Evolution of Free-Floating Giant Planet
  In the paper, we have discussed the problem of the existence of the metallic hydrogen in the superconducting state inside the cold giant planet. We have shown that the {\it cold} planet represents the final state of the thermal evolution of free-floating giant planet. 
R. Szcz\k{e}\'sniak, M.W. Jarosik, M. Szcz\k{e}\'sniak, A.P. Durajski
astro-ph.EP