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Synergistic Dynamical Decoupling and Circuit Design for Enhanced Algorithm Performance on Near-Term Quantum Devices.

Yanjun Ji1, Ilia Polian1

  • 1Institute of Computer Architecture and Computer Engineering, University of Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart, Germany.

Entropy (Basel, Switzerland)
|July 26, 2024
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Summary

Dynamical decoupling (DD) improves quantum algorithms by optimizing circuit design alongside hardware. Effective error mitigation requires a holistic approach considering both factors for reliable quantum computing.

Keywords:
dynamical decouplingnear-term quantum devicesquantum circuit designquantum error mitigation

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Area of Science:

  • Quantum Computing
  • Quantum Error Mitigation

Background:

  • Dynamical decoupling (DD) is crucial for mitigating errors in quantum devices.
  • DD effectiveness is influenced by hardware specifics and algorithm implementation.

Purpose of the Study:

  • To investigate the combined impact of DD and optimized circuit design on quantum algorithm performance.
  • To analyze how hardware features and algorithm design affect DD's error mitigation capabilities.

Main Methods:

  • Utilized eight IBM quantum devices for analysis.
  • Examined circuit fidelity, scheduling duration, and native gate sets.
  • Assessed gate decompositions, DD sequences, and optimization levels.

Main Results:

  • Found an inverse relationship between DD effectiveness and algorithm inherent performance.
  • Highlighted the importance of gate directionality and circuit symmetry.
  • Demonstrated hardware and algorithm design synergy for DD efficacy.

Conclusions:

  • Optimizing DD protocols requires a holistic strategy integrating hardware and algorithm design.
  • This approach is vital for high-quality, reliable execution of near-term quantum algorithms.