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Josephson Arbitrary Waveform Synthesis With Multilevel Pulse Biasing.

Justus A Brevik1, Nathan E Flowers-Jacobs1, Anna E Fox1

  • 1National Institute of Standards and Technology, Boulder, CO 80305 USA.

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|July 25, 2017
PubMed
Summary
This summary is machine-generated.

New pulse-bias electronics enable quantum-accurate waveform generation. Researchers created the first uncompensated bipolar sinusoidal waveform, advancing Josephson arbitrary waveform synthesizer technology.

Keywords:
Digital-analog conversionJosephson arraysquantizationsignal synthesisstandardssuperconducting device measurementssuperconducting integrated circuitsvoltage measurement

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Area of Science:

  • Quantum Metrology
  • Electronics Engineering
  • Waveform Synthesis

Background:

  • Accurate waveform generation is crucial for quantum technologies.
  • Traditional methods often require complex low-frequency compensation biases.
  • Josephson arbitrary waveform synthesizers (JAWS) are key instruments.

Purpose of the Study:

  • To implement new commercial pulse-bias electronics for improved waveform generation.
  • To demonstrate the synthesis of quantum-accurate waveforms without low-frequency compensation.
  • To characterize the performance and operating margins of synthesized waveforms.

Main Methods:

  • Utilized new commercial pulse-bias electronics with a Josephson arbitrary waveform synthesizer.
  • Applied multilevel pulse bias for waveform generation.
  • Synthesized both uncompensated and compensated sinusoidal waveforms at different frequencies and amplitudes.

Main Results:

  • Successfully generated the first quantum-accurate bipolar sinusoidal waveform without low-frequency compensation.
  • Achieved quantum accuracy for a 1 kHz uncompensated waveform with 325 mV rms amplitude and a 1.5 mA operating current range.
  • Synthesized a quantum-accurate 1 MHz sinusoid with a 1.2 mA operating margin.
  • Generated a compensated 1 kHz sinusoid with 1 V rms amplitude and a 2.7 mA operating margin.

Conclusions:

  • New pulse-bias electronics significantly enhance the generation of quantum-accurate waveforms.
  • Elimination of low-frequency compensation bias is feasible, simplifying waveform synthesis.
  • The developed technique offers improved accuracy and wider operating margins for waveform generation.