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Deterministic linear optics quantum computation with single photon qubits.

N Yoran1, B Reznik

  • 1School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel.

Physical Review Letters
|August 9, 2003
PubMed
Summary
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This study presents an efficient quantum computation scheme using linear optics and single photon states. It significantly reduces resource requirements per logical gate, offering a deterministic approach via teleportation.

Area of Science:

  • Quantum Information Science
  • Quantum Computing
  • Linear Optics

Background:

  • Previous quantum computation schemes, such as the Knill, Laflamme, and Milburn proposal, required significant resources per logical gate.
  • Encoding qubits in single photon states is a key area of research in quantum information science.

Purpose of the Study:

  • To propose an efficient scheme for quantum computation using linear optical elements.
  • To reduce the resource overhead per logical gate compared to existing methods.
  • To enable deterministic quantum computation through a novel approach.

Main Methods:

  • Encoding qubits in single photon states.
  • Utilizing linear optical elements for quantum operations.
  • Preparing a "linked" photon state tailored to specific quantum circuits.

Related Experiment Videos

  • Employing a sequence of deterministic teleportation steps for computation.

    • Main Results:

    • The proposed scheme reduces the resources required per logical gate by several orders of magnitude.
    • The resource overhead per gate is independent of the computation's length.
    • The scheme enables deterministic quantum computation once the linked photon state is prepared.

    Conclusions:

    • This efficient scheme offers a significant improvement in resource requirements for linear optical quantum computation.
    • The deterministic nature of the computation, post-state preparation, simplifies the execution of quantum algorithms.
    • The findings pave the way for more practical and scalable quantum computing architectures.