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A co-simulation of superconducting qubit and control electronics for quantum computing.

Zhanhong Jin1, Shaowei Li2,3, Xinzhe Wang4,5

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Scalable quantum computing requires advanced control systems. This study models superconducting qubits and control electronics, using co-simulation to define Digital-to-Analog Converter (DAC) specifications for high-fidelity qubit manipulation.

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Area of Science:

  • Quantum Computing
  • Superconducting Qubits
  • Control Systems Engineering

Background:

  • Increasing qubit counts in quantum computing systems strain current circuit and control scalability.
  • Achieving high-fidelity control is crucial for advanced quantum computations.
  • Existing control architectures may not support large-scale quantum computer expansion.

Purpose of the Study:

  • To develop a behavioral-level model for superconducting qubits and their control electronics.
  • To perform co-simulation for evaluating the performance of qubit control systems.
  • To derive essential design specifications for scalable and high-fidelity quantum control.

Main Methods:

  • Behavioral-level modeling of superconducting qubits and control electronics.
  • Co-simulation using MATLAB and Simulink environments.
  • Analysis of Digital-to-Analog Converter (DAC) parameters including resolution, sampling rates, and nonlinearities.

Main Results:

  • Identified an 8-bit or higher DAC resolution as critical for high-fidelity qubit control.
  • Optimized control system design by considering DAC sampling rates, integral/differential nonlinearities, and filter characteristics.
  • Derived specific design parameters for efficient and accurate qubit manipulation.

Conclusions:

  • The proposed model and co-simulation approach effectively address scalability challenges in quantum computing.
  • This methodology provides valuable insights for designing large-scale superconducting quantum computing systems.
  • The derived specifications enhance the potential for accurate and efficient qubit control in future quantum processors.