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Demonstration of a small programmable quantum computer with atomic qubits

Nature, ISSN: 1476-4687, Vol: 536, Issue: 7614, Page: 63-66
2016
  • 623
    Citations
  • 0
    Usage
  • 599
    Captures
  • 28
    Mentions
  • 347
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    623
    • Citation Indexes
      595
    • Patent Family Citations
      15
      • Patent Families
        15
    • Policy Citations
      13
      • Policy Citation
        13
  • Captures
    599
  • Mentions
    28
    • News Mentions
      22
      • News
        22
    • Blog Mentions
      3
      • Blog
        3
    • References
      3
      • Wikipedia
        3
  • Social Media
    347
    • Shares, Likes & Comments
      347
      • Facebook
        347

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Article Description

Quantum computers can solve certain problems more efficiently than any possible conventional computer. Small quantum algorithms have been demonstrated on multiple quantum computing platforms, many specifically tailored in hardware to implement a particular algorithm or execute a limited number of computational paths. Here we demonstrate a five-qubit trapped-ion quantum computer that can be programmed in software to implement arbitrary quantum algorithms by executing any sequence of universal quantum logic gates. We compile algorithms into a fully connected set of gate operations that are native to the hardware and have a mean fidelity of 98 per cent. Reconfiguring these gate sequences provides the flexibility to implement a variety of algorithms without altering the hardware. As examples, we implement the Deutsch-Jozsa and Bernstein-Vazirani algorithms with average success rates of 95 and 90 per cent, respectively. We also perform a coherent quantum Fourier transform on five trapped-ion qubits for phase estimation and period finding with average fidelities of 62 and 84 per cent, respectively. This small quantum computer can be scaled to larger numbers of qubits within a single register, and can be further expanded by connecting several such modules through ion shuttling or photonic quantum channels.

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