Stability and characteristic propagation speeds in superconducting cosmic and other string models

Details Stability and characteristic propagation speeds in superconducting cosmic and other string models Stability and characteristic propagation speeds in superconducting cosmic and other string models

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phlb..228..466c&link_type=abstract

Physics Letters B, Volume 228, Issue 4, p. 466-470.

Physics

58

Scientific paper

A bicharasteristic version is obtained for the differential equations of motion in a recently introduced formalism for the (fully covariant) treatment of a broad range of macroscopic ``thin'' string models, with applicability extending from ordinary (violin type) elastic strings to superconducting cosmic strings. In any locally stable state there are two bicharacteristic propagation speeds corresponding to group velocities of transverse (extrinsic) and longitudinal (intrinsic) perturbations. The local stability requirement excludes states in which the string tension T is negative or in which its derivative with respect to the energy density (per unit length) U is positive.

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