The original paper
K. Higuchi, T. Komatsu, N. Konno, H. Morikawa, and E. Segawa, “A discontinuity of the energy of quantum walk in impurities.”
has been published in the Special Issue “Quantum Fields and Off-Shell Science” of the online journal Symmetry to which Prof. Dr. Ohtsu, Director-in-Chief, RODreP serves as a Guest Editor (June 24, 2021).
Its PDF version can be downloaded from the URL below.
PDF Version: https://www.mdpi.com/2073-8994/13/7/1134/pdf