Anisotropic Null String Cosmologies
Ioannis Giannakis, K. Kleidis, K. Kuiroukidis, D. Papadopoulos
Abstract
We study string propagation in an anisotropic, cosmological background. We solve the equations of motion and the constraints by performing a perturbative expansion of the string coordinates in powers of c2, the world-sheet speed of light. To zeroth order the string is approximated by a tensionless string (since c is proportional to the string tension T). We obtain exact, analytical expressions for the zeroth and the first order solutions and we discuss some cosmological implications.
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