Beijing National Laboratory for Condensed Matter Physics;
and Institute of Physics;
Chinese Academy of Sciences;
Beijing 100190;
China;
Kavli Institute for Theoretical Sciences;
University of Chinese Academy of Sciences;
Beijing 100190;
China;
South Bay Interdisciplinary Science Center;
Dongguan 523808;
China;
Beijing Academy of Quantum Information Sciences;
Beijing 100193;
China;
spectral degeneracy splitting; discrete-time quantum walk; quantum circuit; non-Hermitian skin effect;