  In this paper, the application of quantum computing (QC) in solving gate
insulator Poisson equation is studied, through QC simulator and hardware in
IBM. Various gate insulator stacks with and without fixed charges are studied.
It is found that by increasing the number of clock bits and by choosing
appropriate evolution time, accurate solutions can be obtained in QC
simulation. However, when the real quantum hardware is used, the accuracy is
substantially reduced. Therefore, a more robust quantum circuit or error
correction should be employed and developed.
