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Quantum Numbers

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It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.

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Voltage Dividers

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Kirchhoff's voltage law implies that the sum of the voltages across the resistors in series equals the source voltage. This means that the...

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Non-ohmic Devices

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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

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Non-Restoring Array Divider Using Optimized CAS Cells Based on Quantum-Dot Cellular Automata with Minimized Latency

Hyun-Il Kim¹, Jun-Cheol Jeon²

¹Department of Robotics Engineering, Daegu Gyeongbuk Institute of Science & Technology, Dalseong-gun, Daegu 42988, Korea.

Nanomaterials (Basel, Switzerland)

|February 15, 2022

Summary

Quantum-dot cellular automata (QCA) technology offers a promising alternative to CMOS limitations. This study introduces an optimized QCA-based non-restoring array divider (N-RAD) with reduced power and latency for cryptographic applications.

Keywords:

nanotechnology non-restoring array divider public-key cryptography quantum simulation quantum-dot cellular automata

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Area of Science:

Quantum Computing and Nanotechnology
Digital Circuit Design

Background:

Complementary Metal-Oxide Semiconductor (CMOS) technology faces physical limitations, necessitating next-generation solutions like Quantum-Dot Cellular Automata (QCA).
Dividers are fundamental arithmetic circuits, crucial for complex operations like inversion and exponentiation used in public-key cryptography.

Purpose of the Study:

To propose an improved design for a non-restoring array divider (N-RAD) utilizing Quantum-Dot Cellular Automata (QCA) technology.
To optimize QCA-based dividers by employing novel controlled add/subtract (CAS) cells for enhanced stability, compactness, and minimized power dissipation.

Main Methods:

Developed a new controlled add/subtract (CAS) cell incorporating a full adder, designed for stability and low power consumption.
Implemented and simulated the proposed QCA-based N-RAD design using QCADesigner and QCAPro simulation tools.
Compared the performance of the proposed design against existing N-RAD structures.

Main Results:

The proposed full adder design achieves at least a 25% reduction in energy loss rate compared to existing structures.
The novel QCA-based N-RAD exhibits approximately 23% to 4.5% lower latency than the latest coplanar and multilayer QCA dividers.
The design demonstrates significant improvements in efficiency and performance over current N-RADs.

Conclusions:

The proposed QCA-based N-RAD design offers a significant advancement over existing technologies, addressing CMOS limitations.
The optimized CAS cell and overall divider design contribute to reduced power consumption and enhanced operational speed.
This research paves the way for more efficient cryptographic systems and other complex arithmetic operations.