Coupled currents in cosmic strings

Abstract

We first examine the microstructure of a cosmic string endowed with two simple Abelian currents. This microstructure depends on two state parameters. We then provide the macroscopic description of such a string and show that it depends on an additional Lorentz-invariant state parameter that relates the two currents. We find that in most of the parameter space, the two-current string is essentially equivalent to the single current-carrying string, i.e., only one field condenses onto the defect. In the regions where two currents are present, we find that as far as stability is concerned, one can approximate the dynamics with good accuracy using an analytic model based on either a logarithmic (on the electric side, i.e., for timelike currents) or a rational (on the magnetic side, i.e., for spacelike currents) worldsheet Lagrangian.

25 pages, 9 figures

References in corpus (28)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Hybrid Inflation
• How generic is cosmic string formation in SUSY GUTs
• Gravitational wave stochastic background from cosmic (super)strings
• Fitting CMB data with cosmic strings and inflation
• Evolution of cosmic string configurations
• Cosmic Vortons and Particle Physics Constraints
• N=1 Supersymmetric Cosmic Strings
• D-term strings
• Evidence against or for topological defects in the BOOMERanG data ?
• Inflation in Supersymmetric Unified Theories
• Chiral Vortons and Cosmological Constraints on Particle Physics
• Are pulsar glitches triggered by a superfluid two-stream instability?
• A Supersymmetric SO(10) Model with Inflation and Cosmic Strings
• Mechanics of cosmic rings
• Avoidance of Collapse by Circular Current-Carrying Cosmic String Loops
• On the Behaviour and Stability of Superconducting Currents
• Waves and instabilities in dissipative rotating superfluid neutron stars
• Cold, warm, and composite (cool) cosmic string models
• Dynamics of cosmic strings and springs; a covariant formulation
• Electromagnetic self interaction in strings
• Equation of state of cosmic strings with fermionic current-carriers
• Fermionic massive modes along cosmic strings
• Microphysics of SO(10) Cosmic Strings
• Current-carrying cosmic string loops 3D simulation: towards a reduction of the vorton excess problem
• Runaway Collapse of Witten Vortex Loops
• Could Electromagnetic Corrections Solve The Vorton Excess Problem ?
• How About Vortons ?

Cited by in corpus (11)

• Nonabelian Bosonic Currents in Cosmic Strings
• Semianalytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings
• Shock waves in superconducting cosmic strings: growth of current
• Multitension strings in high-resolution U(1)$\times$U(1) simulations
• Can type II Semi-local cosmic strings form?
• Fields in nonaffine bundles. III. Effective symmetries and conserved currents in strings and higher branes
• Dynamical simulations of colliding superconducting strings
• Stability of superconducting strings coupled to cosmic strings
• Non-Abelian current oscillations in harmonic string loops: existence of throbbing vortons
• Fields in nonaffine bundles. IV. Harmonious non-Abelian currents in string defects
• Current induction and macroscopic forces for superconducting strings