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Optical quantum computation using cluster States.

Michael A Nielsen1

  • 1School of Physical Sciences and School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia. nielsen@physics.uq.edu.au

Physical Review Letters
|August 25, 2004
PubMed
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This study introduces a novel optical quantum computation method for deterministic entangling gates. It utilizes a few hundred optical elements, merging existing quantum computing proposals for enhanced performance.

Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Quantum Computing

Background:

  • The development of scalable quantum computation remains a significant challenge.
  • Optical quantum computing offers a promising avenue due to the low decoherence of photons.

Purpose of the Study:

  • To propose a novel approach for deterministic entangling quantum gates in optical quantum computation.
  • To leverage existing theoretical frameworks to enhance the feasibility of optical quantum computing.

Main Methods:

  • Implementing a deterministic entangling quantum gate using a few hundred optical elements.
  • Combining the Knill, Laflamme, and Milburn proposal with the Raussendorf and Briegel cluster-state model.
  • Utilizing beam splitters, phase shifters, single photon sources, and photodetectors with feedforward.

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Main Results:

  • A method for performing deterministic entangling quantum gates on average.
  • A scheme that integrates continuous-variable and discrete-variable quantum computing concepts.
  • Potential for a more efficient and robust optical quantum computing architecture.

Conclusions:

  • The proposed approach offers a viable path towards building practical optical quantum computers.
  • This integration of different quantum computing models could accelerate advancements in the field.
  • Further research can explore the scalability and error correction capabilities of this scheme.