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Cryogenic performance evaluation of commercial SP4T microelectromechanical switch for quantum computing applications.

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Microelectromechanical system (MEMS) switches show promise for large-scale quantum computing by enabling cryogenic multiplexers. These switches offer improved performance and stable operation at low temperatures, addressing interconnect challenges.

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Area of Science:

  • Quantum Computing
  • Materials Science
  • Electrical Engineering

Background:

  • Superconducting quantum computers offer scalability but face interconnect bottlenecks.
  • Cryogenic multiplexers are crucial for minimizing wiring in quantum systems.
  • Microelectromechanical system (MEMS) switches are being explored for cryogenic applications.

Purpose of the Study:

  • To investigate the viability of commercial MEMS switches for cryogenic multiplexers in large-scale quantum computing.
  • To evaluate the DC and RF characteristics of MEMS switches at cryogenic temperatures (<10 K).
  • To demonstrate the stable operation and logical capabilities of MEMS switches in a quantum computing context.

Main Methods:

  • Finite element simulations and experimental measurements were used to assess MEMS switch performance.
  • DC and RF characteristics were evaluated at cryogenic temperatures (<10 K).
  • An engineered gate-pulse waveform was developed to mitigate beam bouncing issues.

Main Results:

  • MEMS switches demonstrated improved on-resistance and lower operating voltage at cryogenic temperatures.
  • Superior RF performance and stable dynamic operation exceeding 100 million cycles were achieved.
  • Successful demonstration of single-pole four-throw (SP4T) switching and NAND/NOR logical operations at cryogenic temperatures.

Conclusions:

  • Commercial MEMS switches are a viable solution for cryogenic multiplexers in large-scale quantum computing.
  • The developed gate-pulse waveform ensures stable dynamic operation under quasi-vacuum conditions.
  • MEMS switches show significant potential for advancing the development of practical quantum computing systems.