An Energy-aware Model for the Logic Synthesis of Quantum-Dot Cellular Automata

Frank Sill Torres, Robert Wille, Philipp Niemann, Rolf Drechsler

In: IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems (TCAD) IEEE 2018.


Quantum-dot Cellular Automata (QCA) is an emerging field-coupled nanotechnology with remarkable performance and energy efficiency. In order to enable the exploration of this technology, we propose a model for the logic synthesis of QCA circuits that, for the first time, considers and abstracts all main physical aspects—in particular, energy dissipation. To this end, we review in detail how energy is dissipated in QCA cells and present a corresponding environment that allows for estimation of the energy dissipation with respect to any specific set of technology parameters. Based on that, we derive a model for logic synthesis. A case study confirms the accuracy of the proposed model and furthermore reveals that interconnections have a significant impact in this technology and, thus, require a more rigorous consideration. These findings eventually provide the basis for a new generation of synthesis approaches at the logic level that are explicitly dedicated for QCA systems.

German Research Center for Artificial Intelligence
Deutsches Forschungszentrum für Künstliche Intelligenz