A schematic representation of a QCA wire.
(a) A QCA wire separated in clocking zones labeled from 1 to 4, acting as a shift register. (b) The time-dependence profile of potential barrier for the interdot tunneling (arbitrary units). (c) The shift of the potential barrier profile for adjacent clocking zones.
Success rate for one- and multiline QCA shift registers vs temperature and displacement factor . Cases for one to four lines are shown in (a), (b), (c) and (d), respectively. A clocking pattern with one cell per clocking zone in longitudinal direction and a normal distribution of positional defects of dots within cells is used.
Success rate for a QCA shift register vs displacement factor. Success rate is plotted for one- and multiline shift registers: (a) four lines, (b) three lines, (c) two lines, and (d) 1 line. Temperature and the normal distribution are used.
Contour plots in the plane for the acceptable operationality zones, for one- and multiline QCA shift registers: (a) four lines, (b) three lines, (c) two lines, and (d) one line. (The clocking pattern and the distribution are the same as in Fig. 3.)
Contour plots in the plane for the acceptable operationality zones, for one-line QCA shift registers. The clocking pattern has (a) one cell, (b) two cells, (c) three cells, and (d) four cells per clocking zone in longitudinal direction. The normal distribution is used.
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