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Related Experiment Videos

Quantum noise minimization in transistor amplifiers.

U Gavish1, B Yurke, Y Imry

  • 1Institute for Theoretical Physics, University of Innsbruck, Innsbruck A-6020, Austria.

Physical Review Letters
|May 23, 2006
PubMed
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Quantum restrictions define achievable quantum-limited performance in transistor amplifiers. A practical experimental procedure uses measurable quantities like gain and conductance to approach this limit.

Area of Science:

  • Quantum electronics
  • Solid-state physics
  • Noise analysis

Background:

  • Linear transistor amplifiers are crucial components in various electronic systems.
  • Understanding and minimizing noise is essential for high-performance amplification.
  • Quantum mechanics imposes fundamental limits on amplifier noise performance.

Purpose of the Study:

  • To identify the parameter space for achieving quantum-limited noise performance in transistor amplifiers.
  • To develop a practical experimental procedure for approaching quantum-limited performance.
  • To demonstrate the applicability of the procedure using resonant barrier transistors.

Main Methods:

  • Utilizing general quantum restrictions on noise performance.
  • Analyzing measurable quantities: gain, differential conductance, and output noise.

Related Experiment Videos

  • Applying the derived procedure to a specific device (resonant barrier transistors).

    • Main Results:

    • Defined the region in parameter space for achievable quantum-limited noise performance.
    • Established a practical experimental procedure based on measurable quantities.
    • The procedure is applicable and demonstrated with resonant barrier transistors.

    Conclusions:

    • Quantum-limited noise performance in transistor amplifiers is achievable within specific parameter regimes.
    • A practical, experimentally accessible method exists to approach these fundamental noise limits.
    • Resonant barrier transistors serve as a viable platform for exploring quantum-limited amplification.