The authors analyze the effect of stray charges near a line of quantum-dot cellular automata (QCA) cells. They present the results of full-basis set calculations for three- and four-cell lines, including the ground state polarization and the excitation energy of the first excited state. A comparison is made between cells with parallel-spin electrons and anti-parallel spin electrons, showing that the added complexity of accounting for the anti-parallel spins is not necessary in this case. Finally, a comparison is made between the full-basis calculations and the results of a similar calculation using the Intercellular Hartree Approximation (ICHA). The similarity between these two results demonstrates that the ICHA method is a valid tool for studying the effect of stray charges in larger systems.
LaRue, Matthew, "Effect of Stray Charge on Quantum-dot Cellular Automata: A Full-Basis Calculation" (2012). Celebration of Undergraduate Scholarship. Paper 154