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Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
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Two-layer synchronized ternary quantum-dot cellular automata wire crossings.

Iztok Lebar Bajec1, Primož Pečar

  • 1Faculty of Computer and Information Science, University of Ljubljana, TrŽaška cesta, Slovenia. ilb@fri.uni-lj.si.

Nanoscale Research Letters
|April 18, 2012
PubMed
Summary

Ternary quantum-dot cellular automata enable complex circuits. A novel two-layer wire crossing design with a specific clocking scheme effectively addresses a key challenge in these nanoscale computing systems.

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Area of Science:

  • Nanoscale computing
  • Quantum-dot cellular automata (QCA)
  • Ternary logic systems

Background:

  • Quantum-dot cellular automata (QCA) represent a promising nanoscale computing paradigm.
  • The development of ternary logic and functionally complete logic primitives advances complex QCA circuit design.
  • Wire crossings are a significant hurdle in ternary QCA circuit layout.

Purpose of the Study:

  • To present a novel solution for wire crossings in ternary quantum-dot cellular automata (TQCA).
  • To ensure signal integrity and consistent performance in TQCA circuits with intersecting wires.

Main Methods:

  • Design of a two-layer wire crossing architecture.
  • Implementation of a specialized clocking scheme to manage signal propagation.
  • Analysis of effective delay across crossed wires.

Main Results:

  • Successfully designed a two-layer wire crossing for TQCA.
  • The proposed clocking scheme equalizes the effective delay of crossed wires.
  • This design mitigates a critical issue in TQCA circuit complexity.

Conclusions:

  • The presented two-layer wire crossing is a viable solution for TQCA design.
  • This advancement facilitates the creation of more complex and functional TQCA circuits.
  • Effective delay management is crucial for reliable TQCA operation.