Linewidth broadenings of the electron impurity resonant states in quantum wells with infinite barriers

The linewidth broadenings of the resonant states of impurity electrons in quantum wells with infinite barriers are calculated by the complex-scaling technique. An advantage in the accuracy of calculations using the smooth complex scaling is demonstrated. A dependence of the linewidth broadenings on the quantum well width is studied. The calculated results extend previous analytical and numerical estimations of the linewidth broadening in the similar system.