Invariant length of a cosmic string

Details Invariant length of a cosmic string Invariant length of a cosmic string

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvd..41.3612a&link_type=abstract

Physical Review D (Particles and Fields), Volume 41, Issue 12, 15 June 1990, pp.3612-3619

Physics

1

Scientific paper

The world sheet of a cosmic string is characterized by a function l, invariant under both coordinate and gauge transformations, which can be interpreted as the ``invariant length'' of the string. In flat space, l reduces to the invariant length of Vachaspati and Vilenkin, and gives an upper bound for the actual length of the string, and a lower bound for its energy, as measured by any inertial observer. In curved spacetime, time variations in the invariant length divide naturally into two parts: one due to the tidal tensor at points exterior to the world sheet and one due to the tidal tensor at points on the world sheet itself.

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