Simulation of logic gate using d-dot's

Nakajima, Susumu*; Kato, Masaru*; Koyama, Tomio*; Machida, Masahiko  ; Ishida, Takekazu*; Nori, F.*

A d-dot is a superconducting composite structure of d- and s-wave superconductors, which shows spontaneous half-quantized magnetic fluxes. We developed numerical method to analyze the time development of these spontaneous magnetic fluxes, based on the twocomponents Ginzburg-Landau equation. The d-dot can be used as an element of quantum dot cellular automata logic gates. We show a simulation, which demonstrates the transfer of information between two d-dot's.