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Metastable ringlike semitopological solitons.

M Axenides1, E Floratos, S Komineas

  • 1Institute of Nuclear Physics, N.C.R.P.S. Demokritos, 153 10, Athens, Greece.

Physical Review Letters
|June 1, 2001
PubMed
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Researchers discovered new stable, ring-like scalar field configurations, termed semitopological defects. These superconducting rings possess both topological and nontopological charges, ensuring their stability in scalar field theories.

Area of Science:

  • Theoretical Physics
  • Condensed Matter Physics
  • High Energy Physics

Background:

  • Scalar field theories are fundamental in describing various physical phenomena.
  • Localized field configurations, such as solitons and vortices, are crucial in understanding particle physics and cosmology.
  • The stability of these configurations often relies on conserved charges, either topological or nontopological.

Purpose of the Study:

  • To demonstrate the existence of novel stable, ring-like localized scalar field configurations.
  • To investigate the nature of stability for these configurations, specifically exploring the role of combined charges.
  • To analyze the properties of these configurations, including their superconducting nature and energy characteristics.

Main Methods:

  • Derivation of analytical solutions for large ring configurations.

Related Experiment Videos

  • Numerical computation of field configurations.
  • Formulation and application of virial theorems to prove stability.
  • Simulation of the evolution of a finite-size Q ring on a 3D lattice.

    • Main Results:

    • Existence of stable, ring-like localized scalar field configurations is confirmed.
    • These configurations are identified as 'semitopological' due to their combined topological and nontopological stabilizing charges.
    • The rings exhibit superconducting properties, carrying Noether charge and current.
    • They represent local minima of energy within scalar field theories possessing an unbroken U(1) global symmetry.

    Conclusions:

    • The study introduces a new class of stable field configurations with potential implications for particle physics and cosmology.
    • The concept of semitopological defects broadens the understanding of stability mechanisms in field theories.
    • The superconducting nature of these rings opens avenues for exploring novel phenomena in condensed matter and high-energy physics.