Exact String Solutions in (2 + 1)DIMENSIONAL de Sitter SpaceTime
Abstract
Exact and explicit string solutions in de Sitter spacetime are found. (Here, the string equations reduce to a sinhGordon model). A new feature without flat spacetime analogy appears: starting with a single worldsheet, several (here two) strings emerge. One string is stable and the other (unstable) grows as the universe grows. Their invariant size and energy either grow as the expansion factor or tend to constant. Moreover, strings can expand (contract) for large (small) universe radius at a different rate than the universe does.
 Publication:

Modern Physics Letters A
 Pub Date:
 1994
 DOI:
 10.1142/S0217732394002598
 Bibcode:
 1994MPLA....9.2745D