Four-dot QCA gates. (a) The universal MV gate. The majority of the three fixed inputs, which is “0” in this figure, appears at the output as a result of Coulombic interactions and minimum energetics. (b) The inverter gate. (c) Truth table of the MV gate. When d3 = ”0”, the MV gate performs AND logical operations on d1 and d2, and when d3 = ”1” the MV gate functions as a two-input OR gate .
Rahimi and Nejad Nanoscale Research Letters 2012 7:274 doi:10.1186/1556-276X-7-274