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Vortex bubble formation in pair plasmas.
V I Berezhiani1, N L Shatashvili, S M Mahajan
1Andronikashvili Institute of Physics, Tbilisi 0177, Georgia.
Summary
Delocalized vortex solitons in relativistic pair plasmas can become unstable, forming expanding bubbles devoid of electromagnetic fields. This instability is driven by temperature asymmetries and background field intensity.
Area of Science:
- Plasma Physics
- Nonlinear Optics
- Astrophysics
Background:
- Relativistic pair plasmas are crucial in astrophysical phenomena.
- Vortex solitons are stable structures in nonlinear media.
- Temperature asymmetries can influence plasma dynamics.
Purpose of the Study:
- To investigate the stability of delocalized vortex solitons in relativistic pair plasmas.
- To understand the conditions leading to soliton instability.
- To characterize the resulting structures, such as electromagnetic bubbles.
Main Methods:
- Qualitative arguments using a hydrodynamic analogy.
- Numerical solutions of the nonlinear Schrödinger equation.
- Analysis of systems with saturating nonlinearity and temperature asymmetries.
Main Results:
- Delocalized vortex solitons exhibit instability at intermediate electromagnetic field intensities.
- Instability leads to the formation of expanding cavitating bubbles.
- These bubbles are characterized by the absence of electromagnetic fields.
Conclusions:
- Temperature asymmetries in relativistic pair plasmas can destabilize vortex solitons.
- The formation of electromagnetic bubbles is a significant consequence of this instability.
- The findings have implications for understanding wave propagation and structure formation in plasmas.