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Nanoscale solid-state quantum computing.

A Ardavan1, M Austwick, S C Benjamin

  • 1Clarendon Laboratory, Parks Road, Oxford OX1 3PU, UK.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|July 19, 2003
PubMed
Summary

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This summary is machine-generated.

Building quantum computers faces challenges, but solid-state approaches using quantum dots and carbon nanotubes show promise for scalable quantum information processing. These methods offer potential for global addressing, overcoming individual addressing limitations in nanoscale qubit systems.

Area of Science:

  • Quantum Computing
  • Nanotechnology
  • Solid-State Physics

Background:

  • The ultimate architecture for quantum computers remains undetermined.
  • Various nanoscale solid-state schemes are under active development across diverse materials.

Purpose of the Study:

  • To review current nanoscale solid-state approaches for building quantum computers.
  • To highlight the potential and challenges of different qubit implementation strategies.

Main Methods:

  • Utilizing nanofabricated quantum dots with controlled interactions and readout.
  • Employing epitaxial quantum dots in semiconductor vertical arrays with optical control.
  • Leveraging single-walled carbon nanotubes for self-assembly of endohedral fullerenes to store quantum information in electron spin.

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Main Results:

  • Nanofabricated quantum dots allow designer configurations and established control/readout technologies.
  • Epitaxial quantum dots enable vertical arrays in semiconductors, with ultrafast optical control and measurement.
  • Endohedral fullerenes within carbon nanotubes can embody quantum information via electron spin.

Conclusions:

  • Individual addressing of nanoscale qubits presents scalability challenges.
  • Global addressing methods offer a viable alternative for computation in these systems.
  • Solid-state schemes provide promising avenues for future quantum computer development.