Diamagnetic field states in cosmological plasmas

Area of Science:

• Cosmology
• Plasma Physics
• Astrophysics

Background:

• Relativistic plasmas are fundamental to understanding the early universe.
• The origin and evolution of primordial magnetic fields remain a key challenge in cosmology.

Purpose of the Study:

• To investigate the dynamical evolution of generalized vorticity in relativistic plasmas within a cosmological context.
• To explore the emergence and self-consistent sustainment of magnetic and velocity fields in an expanding universe.
• To analyze a special class of fields in a vanishing generalized vorticity state.

Main Methods:

• Utilizing a generally covariant electrovortic (magnetofluid) formalism.
• Deriving macroscopic vorticity and magnetic field structures.
• Analyzing plasma configurations in spatial equilibrium and their temporal evolution.

Main Results:

• Macroscopic magnetic and velocity fields can form stable, diamagnetic states in expanding relativistic plasmas.
• A special class of "superconductor-like" fields emerges when generalized vorticity vanishes.
• In the early universe's radiation era, these fields grow proportionally to the scale factor.

Conclusions:

• A direct link is established between the expansion of the universe and the generation of primordial magnetic fields.
• The study provides a theoretical framework for understanding self-sustaining magnetic fields in cosmological plasmas.
• The vanishing generalized vorticity condition reveals a significant mechanism for early universe field amplification.