Multi-Layer Molecular Quantum-Dot Cellular Automata Multiplexing Structure with Physical Verification for Secure Quantum RAM

TL;DR

This paper introduces a new multi-layer quantum-dot cellular automata multiplexer design for secure quantum RAM with improved performance.

Contribution

A novel ultra-slim vertical panel multi-layer 2-to-1 Mux using molecular QCA is proposed with physical verification and performance improvements.

Findings

The proposed Mux design achieves significant improvements in standard design costs.

Physical verification confirms polarization and secure RAM design considerations.

The design is expanded to 4-to-1 Mux and applied to D-latch and RAM cells.

Abstract

Molecular quantum-dot cellular automata (QCA) are attracting much attention as an alternative that can improve the problems of digital circuit design technology represented by existing CMOS technology. In particular, they are well suited to the upcoming nanoquantum environment era with their small size, fast switching speed, and low power consumption. In this study, we propose a 5 × 5 × 1 ultra-slim vertical panel type multi-layer 2-to-1 multiplexer (Mux) using molecular QCA, departing from conventional multi-layer formats, and show its expansion to 4-to-1 Mux and application to vertical panel type D-latch and RAM cells. In addition, the polarization phenomenon of cells is physically proven using the potential energy, distance among electrons, and the relative positions of cells, and the secure RAM design takes noise elimination and polarization of the output signal into consideration. The circuits are simulated in terms of operation and performance using QCADesigner 2.0.3 and QCADesignerE, and the proposed multi-layer 2-to-1 Mux shows a significant improvement of at least 1473% and 277% in two representative standard design costs compared to the state-of-the-art multi-layer Muxes.

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