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Related Experiment Videos

Counting defects in an instantaneous quench.

D Ibaceta1, E Calzetta

  • 1Department of Physics and Instituto de Astronomia y Física del Espacio, University of Buenos Aires, Buenos Aires, Argentina. ivan@df.uba.ar

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|April 24, 2002
PubMed
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Defect formation during rapid cooling in type II superconductors was simulated. Theoretical defect density predictions were compared to simulation results, revealing limitations of the Gaussian approximation in nonequilibrium phase transitions.

Area of Science:

  • Condensed Matter Physics
  • Superconductivity
  • Non-equilibrium Dynamics

Background:

  • Second-order phase transitions involve changes in material properties.
  • Superconductors exhibit unique quantum phenomena.
  • Nonequilibrium processes are crucial for understanding dynamic material behavior.

Purpose of the Study:

  • Investigate defect formation in type II superconductors during a quench to zero temperature.
  • Assess the accuracy of theoretical defect density predictions.
  • Characterize the dynamics of out-of-equilibrium phase transitions.

Main Methods:

  • Nonlinear time evolution simulations of the order parameter field.
  • Analysis of defect density predictions from Gaussian approximation.

Related Experiment Videos

  • Quantitative characterization of nonequilibrium phase transition aspects.

    • Main Results:

    • Defect formation dynamics were simulated in detail.
    • The reliability of Gaussian approximation for defect density was determined.
    • Quantitative insights into out-of-equilibrium transitions were obtained.

    Conclusions:

    • The Gaussian approximation has limitations in predicting defect density accurately.
    • Simulations provide a more comprehensive understanding of defect formation.
    • Further refinement of theoretical models is needed for nonequilibrium superconductors.