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RL Circuits

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An RL circuit consists of a resistor and an inductor and may have a source of emf connected to it. The inductor in the circuit helps to prevent rapid changes in current, which can be helpful if a steady current is required but the external source has a fluctuating emf. Consider an open RL circuit connected to a source of constant emf. As soon as the circuit is closed, the current begins to increase at a rate that depends only on the value of the inductance in the circuit. The greater the...
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Phasors and their corresponding sinusoids are interrelated, offering unique insights into the behavior of alternating current (AC) circuits. One way to understand this relationship is through the operations of differentiation and integration in both the time and phasor domains.
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LC Circuits01:21

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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Quantum LFSR Structure for Random Number Generation Using QCA Multilayered Shift Register for Cryptographic Purposes.

Hyun-Il Kim1, Jun-Cheol Jeon2

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

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Summary

This study introduces novel multilayered quantum-dot cellular automata (QCA) designs for linear feedback shift registers (LFSRs), enhancing security and sensor network performance. The new structures offer improved area, speed, and power efficiency over existing QCA and CMOS technologies.

Keywords:
cell interactioncryptographylinear feedback shift registerquantum-dot cellular automatarandom number generator

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Area of Science:

  • Quantum computing
  • Nanotechnology
  • Cryptography

Background:

  • Current CMOS-based random number generators (RNGs) face integration limits due to quantum tunneling.
  • Quantum-dot cellular automata (QCA) offer superior performance in space, speed, and power compared to CMOS.
  • Existing QCA shift registers (SRs) often have planar structures, leading to large cell areas and unstable signals.

Purpose of the Study:

  • To propose novel multilayered QCA structures for enhanced linear feedback shift registers (LFSRs).
  • To design efficient QCA multiplexers, D-latches, and SR blocks for improved cryptographic applications.
  • To develop a dual-edge triggering LFSR for advanced security functionalities.

Main Methods:

  • Design of multilayered 2-to-1 QCA multiplexer and D-latch.
  • Construction of SR blocks using the proposed D-latch.
  • Integration of XOR operations and dual-edge triggering for LFSR design.
  • Optimization using meticulous cell interaction techniques to minimize area and latency.
  • Performance evaluation using QCADesigner and QCADesigner-E simulations.

Main Results:

  • Demonstration of high-performance multilayered QCA structures for LFSRs.
  • Significant reduction in cell area and latency compared to existing QCA SR circuits.
  • Achieved superior space, speed, and power efficiency.
  • Verified cost and energy dissipation through detailed simulations.

Conclusions:

  • The proposed multilayered QCA multiplexer, D-latch, and LFSR structures offer a viable and efficient alternative to current cryptographic technologies.
  • These advanced QCA designs pave the way for next-generation secure systems with enhanced performance.
  • The study validates the efficiency and potential of QCA for cryptographic applications through rigorous simulation.