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Related Experiment Videos

Stabilizing superconductivity in nanowires by coupling to dissipative environments.

Henry C Fu1, Alexander Seidel, John Clarke

  • 1Department of Physics, University of California, Berkeley, California 94720-7300, USA.

Physical Review Letters
|May 23, 2006
PubMed
Summary

Quantum phase slips destroy superconductivity in finite superconducting nanowires. However, environmental dissipation stabilizes the superconducting phase, explaining the antiproximity effect observed in zinc nanowires.

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Area of Science:

  • Condensed matter physics
  • Quantum mechanics
  • Materials science

Background:

  • Superconducting nanowires are crucial for quantum technologies.
  • Understanding their behavior in realistic environments is essential.
  • Quantum phase slips are known to disrupt superconductivity.

Purpose of the Study:

  • To develop a theory for finite-length superconducting nanowires interacting with an environment.
  • To investigate the role of dissipation in stabilizing superconductivity.
  • To explain the observed antiproximity effect in zinc nanowires.

Main Methods:

  • Theoretical modeling of a finite-length superconducting nanowire.
  • Analysis of quantum phase slip phenomena.
  • Application of the theory to experimental observations.

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Main Results:

  • In the absence of dissipation, quantum phase slips inevitably destroy superconductivity, even at absolute zero temperature.
  • Dissipation is shown to stabilize the superconducting phase.
  • The developed theory successfully explains the antiproximity effect in zinc nanowires.

Conclusions:

  • Environmental dissipation plays a critical role in maintaining superconductivity in finite nanowires.
  • The theory provides a framework for understanding dissipation-induced stabilization of superconducting states.
  • This work offers insights into the behavior of superconducting devices in realistic settings.