Sharif University of Technology Scientia Iranica 1026-3098 32 5 2025 09 01 QQCAsim: A new simulation tool for quaternary logic in QCA technology 23231 10.24200/sci.2023.60421.6789 EN Mohammad Amin Mianroodi Department of Electrical Engineering, CT. C., Islamic Azad University, Tehran, Iran Reza Akbari-Hasanjani Department of Electrical Engineering, CT. C., Islamic Azad University, Tehran, Iran Reza Sabbaghi-Nadooshan - Department of Electrical Engineering, CT. C., Islamic Azad University, Tehran, Iran. - Intelligent Power System Research Center, CT. C., Islamic Azad University, Tehran, Iran. Journal Article 2022 05 13 Quantum-dot Cellular Automata (QCA) technology is one of the candidate technologies to replace CMOS in Multi-Valued Logic (MVL) circuit designs, to overcome the problems of binary systems. One of the advantages of MVL systems is that they can process more information. Some techniques are essential to simulate and evaluate new multi-valued designs and their performance. This article introduces a new software platform for simulating Quaternary QCA (QQCA) circuits that can be run on computers on Windows and Linux computers is powerful and can run simulations with high accuracy. The presented tool provides the results in two formats. The first format is waveform and the second one is truth table. The presented software has a user-friendly interface that allows users to easily implement their QQCA circuits. Furthermore, the electrostatic energies for all cases in which the basic gates assume four values are determined and the step-by-step simulation process is described. The basic NOT, AND, and OR gates have already been simulated and validated by the relevant software. https://scientiairanica.sharif.edu/article_23231_121a0ed44c581c51409c56b91ec8d643.pdf