  This paper introduces SiQAD, a computer-aided design tool enabling the rapid
design and simulation of atomic silicon dangling bond quantum dot patterns
capable of computational logic. Several simulation tools are included, each
able to inform the designer on various aspects of their designs: a ground-state
electron configuration finder, a non-equilibrium electron dynamics simulator,
and an electric potential landscape solver with clocking electrode support.
Simulations have been compared against past experimental results to inform the
electron population estimation and dynamic behavior. New logic gates suitable
for this platform have been designed and simulated, and a clocked wire has been
demonstrated. This work paves the way for the exploration of the vast and
fertile design space of atomic silicon dangling bond quantum dot circuits.
