Cosmic strings with curvature corrections

Details Cosmic strings with curvature corrections Cosmic strings with curvature corrections

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..46.1721b&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 46, Issue 4, 15 August 1992, pp.1721-1729

Mathematics

Logic

25

Nonlinear Or Nonlocal Theories And Models, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

A generic model of string described by a Lagrangian density that depends on the extrinsic curvature of the string worldsheet is studied. Using a system of coordinates adapted to the string world sheet the equation of motion and the energy-momentum tensor are derived for strings evolving in curved spacetime. We find that the curvature corrections may change the relation between the string energy density and the tension. It can also introduce heat propagation along the string. We also find for the Polyakov as well as Nambu strings with a topological term that the open string end points can travel with a speed less than the velocity of light.

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