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Related Experiment Videos

Persistent current in superconducting nanorings.

K A Matveev1, A I Larkin, L I Glazman

  • 1Department of Physics, Duke University, Box 90305, Durham, North Carolina 27708, USA.

Physical Review Letters
|August 23, 2002
PubMed
Summary
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Quantum phase slips suppress superconductivity in thin rings, altering current oscillations. This study models this phenomenon using quantum particle behavior in a sinusoidal potential.

Area of Science:

  • Condensed matter physics
  • Quantum mechanics

Background:

  • Superconductivity in nanoscale systems is sensitive to quantum effects.
  • Quantum phase slips (QPS) are a key phenomenon affecting superconductivity in thin films and rings.

Purpose of the Study:

  • To investigate the impact of quantum phase slips on the persistent current oscillations in superconducting nanorings.
  • To model the low-energy properties of superconducting nanorings affected by QPS.

Main Methods:

  • Reducing the problem to a quantum particle in a sinusoidal potential.
  • Solving the Schrödinger equation with twisted boundary conditions.

Main Results:

  • Quantum phase slips exponentially suppress the amplitude of persistent current oscillations.

Related Experiment Videos

  • The shape of the current-flux oscillations changes from sawtooth to sinusoidal.
  • The current-flux dependence is described by a one-parameter family of functions.

    • Conclusions:

    • The study provides a theoretical framework for understanding superconductivity suppression in nanorings due to QPS.
    • The findings offer insights into the quantum behavior of superconducting circuits at the nanoscale.