Analysis of energy dissipation and point charge effects in Quantum cellular automata circuits

Quantum cellular automata technology is one of the promising nanotechnology in future due to the prospects of extremely low power operation and reduction of interconnections. This paper discuss about energy flow analysis in a QCA circuit. We have reviewed the energy flow equation in a QCA cell for the calculation of energy dissipation in simple QCA circuits. We found higher energy power dissipation of a QCA cell in a QCA circuit for unequal inputs due to availability of different polarization at the input and by majority logic method. We have also analysed the QCA circuit in terms of Fan-in and Fan-out terminology and calculated total energy supplied by clock in a circuit. We also investigated how the polarization of a cell affects near by QCA cell with respect to distance. We have discussed the point charge effect on a QCA cell in a diagonal and X-axis alignment. This analyses used to find the error due to polarization in a QCA circuit and to detect charge of near by QCA cell.