The current Very Large-Scale Integration (VLSI) technology has reached its peak due to the fundamental physical limits of Complementary Metal-Oxide-Semiconductor (CMOS). Quantum-dot Cellular Automata (QCA) is considered a proper alternative CMOS in digital circuit design. QCA features like low power, small area, and high speed nanoscale A code converter that converts determined another one. Cod...

by Géza Tóth In this thesis we investigate the role of correlation and coherence in two possible realizations of Quantum-dot Cellular Automata (QCA): realizations as a semiconductor multi-quantum-dot structure and as a metal-island single electron tunneling circuit. The two are different from the point of view of the underlying physics. The metal island circuits are very strongly connected to t...

Quantum-dot cellular automaton (QCA) is a novel nanotechnology with a very different computational method in compared with CMOS, whereas placement of electrons in cells indicates digital information. This nanotechnology with specifications such as fast speed, high parallel processing, small area, low power consumption and higher switching frequency becomes a promising candidate for CMOS tec...

One of the challenges to scale down transistor size is leakage current through gate oxide. This leakage current results from quantum mechanical tunneling of electrons from the gate electrode through the oxide and in to the transistor channel. Instead of maintaining transistor functionality at smaller scales, a new technology called Quantum cellular automata technology is developed by Lent and K...

Over the last two decades , quantum-dot cellular automata (QCA) has received significant attention as an emerging computing technology (Lent et al., 1993). The basic elements in this technology are the QCA cells, as shown in Fig. 1. Each cell contains two mobile electrons and four quantum dots located in the corners. As per the occupancy of the electrons in the dots, a QCA cell can take differe...

Quantum-dot cellular automata (QCA) is a newly-developed nanotechnology for next-generation nanoelectronic circuits. QCA circuits use the propagation of charge polarity in QCA cells to pass information without any current being involved. It has the advantages of extremely small size, low power consumption, high device density and twinkling operation process. Nanofabrication of QCA circuits may ...

Quantum-dot cellular automata (QCA) is a developing nanotechnology, which seems to be a good candidate to replace the conventional complementary metal-oxide-semiconductor (CMOS) technology. In this article, we present the dataset of average output polarization (AOP) for basic reversible logic gates presented in Ali Newaz et al. (2016) [1]. QCADesigner 2.0.3 has been employed to analysis the AOP...

We study matrix product unitary operators (MPUs) for fermionic one-dimensional (1D) chains. In stark contrast with the case of 1D qudit systems, we show that (i) MPUs do not necessarily feature a strict causal cone and (ii) all Quantum Cellular Automata (QCA) can be represented as MPUs. then introduce natural generalization latter, obtained by allowing an additional operator acting on their aux...