Analyzing a diffusion equation of alternative metals, rapid heat conduction to the heat bath due to edge states is predicted. The edge states are predicted by the bulk topological invariant as a typical example of the bulk-edge correspondence. Realistic time scales of the phenomena for familiar metals are estimated. Have a look at our paper, “Edge states of a diffusion equation in one dimension: Rapid heat conduction to the heat bath”, by Shusei Makino, Takahiro Fukui, Tsuneya Yoshida, and Yasuhiro Hatsugai, Phys. Rev. E 105, 024137 (2022) –Published 24 February 2022. See also arXiv:2106.09945.