Original paper was published online(2021.06.24)
K. Higuchi, T. Komatsu, N. Konno, H. Morikawa, and E. Segawa,
“A discontinuity of the energy of quantum walk in impurities.”
The paper can be downloaded from the URL below.
Abstract:
https://www.mdpi.com/2073-8994/13/7/1134