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Benchmarking Noise and Dephasing in Emerging Electrical Materials for Quantum Technologies.

Saurav Islam1, Saquib Shamim2,3, Arindam Ghosh1,4

  • 1Department of Physics, Indian Institute of Science, Bengaluru, 560012, India.

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New electrically conducting materials are key for quantum technologies. This review benchmarks dephasing and noise in these materials, crucial for quantum device performance and design.

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Area of Science:

  • Quantum Technologies
  • Materials Science
  • Condensed Matter Physics

Background:

  • Electrically conducting materials are essential for quantum technologies, including superconducting qubits and semiconductor nanostructures.
  • Phase coherence in these materials is critical for quantum architecture, as its loss (dephasing) impacts performance.
  • Characterizing dephasing and electrical conductivity noise is vital for quantum applications, yet rarely studied together.

Purpose of the Study:

  • To review and benchmark dephasing and noise in emerging electrically conducting materials for quantum technologies.
  • To elaborate on the physical processes causing dephasing and noise.
  • To evaluate the impact of material synthesis and device fabrication parameters on these properties.

Main Methods:

  • Review of available data on magnetotransport.
  • Analysis of low-frequency fluctuations in electrical conductivity.
  • Benchmarking dephasing and noise properties.

Main Results:

  • Identified key electrically conducting materials relevant to quantum technologies.
  • Elaborated on physical mechanisms underlying dephasing and noise.
  • Assessed the influence of intrinsic and extrinsic factors on material and device performance.

Conclusions:

  • Simultaneous characterization of dephasing and noise is crucial for quantum material and device development.
  • Understanding material synthesis and device realization parameters is key to optimizing quantum performance.
  • Provides a pathway for designing and characterizing materials for advanced quantum applications.