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Related Concept Videos

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

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Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
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Design Example: Underdamped Parallel RLC Circuit01:17

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Consider designing an oscillator circuit, a crucial component in various electronic devices and systems. The objective is to create an oscillator circuit with specific characteristics: a damped natural frequency of 4 kHz and a damping factor of 4 radians per second. To accomplish this, a parallel RLC circuit is employed, known for its ability to sustain oscillations at a resonant frequency. In this case, the damping factor is pivotal in achieving the desired performance.
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Parallel Resonance01:23

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The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
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Fabrication and Characterization of Superconducting Resonators
10:26

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Published on: May 21, 2016

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Analysis and calibration techniques for superconducting resonators.

Giuseppe Cataldo1, Edward J Wollack1, Emily M Barrentine1

  • 1NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.

The Review of Scientific Instruments
|February 2, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a cryogenic calibration method for superconducting microwave resonators, enabling accurate analysis of transmission data. The technique precisely determines the kinetic inductance fraction, crucial for quantum computing applications.

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Area of Science:

  • Superconducting circuits
  • Microwave engineering
  • Quantum device characterization

Background:

  • Accurate characterization of superconducting microwave resonators is essential for quantum technologies.
  • Existing calibration methods often fail to account for complex instrumental responses at cryogenic temperatures.
  • Precise measurement of resonator parameters, like kinetic inductance, is critical for device performance.

Purpose of the Study:

  • To develop and validate an in-situ cryogenic calibration method for complex transmission data of superconducting microwave resonators.
  • To enable accurate extraction of resonator parameters, including resonance frequencies, widths, and kinetic inductance fraction.
  • To provide a robust analysis framework for superconducting resonator characterization.

Main Methods:

  • In-situ cryogenic calibration accounting for vector network analyzer (VNA) to device plane transmission.
  • Phenomenological modeling using physically realizable rational functions for coupled resonator analysis.
  • ABCD-matrix representation of distributed transmission line circuits for parameter extraction.
  • Integration with electromagnetic simulations for enhanced accuracy.

Main Results:

  • Achieved a kinetic inductance fraction determination with 2% accuracy.
  • Demonstrated recovery of complex transmission amplitude within 1% for microstrip and coplanar-waveguide resonators.
  • Validated two distinct analysis approaches for resonator response characterization.
  • Presented experimental configuration and self-consistent constraints for parameter extraction.

Conclusions:

  • The proposed in-situ cryogenic calibration method provides accurate and reliable characterization of superconducting microwave resonators.
  • The developed analysis techniques effectively extract key resonator parameters, facilitating device design and optimization.
  • This work offers a significant advancement in the precise measurement of superconducting quantum devices.