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O(d,d)-covariant string cosmology
The recently discovered $O(d,d)$ symmetry of the space of slowly varying cosmological string vacua in $d+1$ dimensions is shown to be preserved in the presence of bulk string matter. The existence of $O(d,d)$ conserved currents allows all the equations of string cosmology to be reduced to first-orde...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
1992
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/0370-2693(92)90744-O http://cds.cern.ch/record/228089 |
| Sumario: | The recently discovered $O(d,d)$ symmetry of the space of slowly varying cosmological string vacua in $d+1$ dimensions is shown to be preserved in the presence of bulk string matter. The existence of $O(d,d)$ conserved currents allows all the equations of string cosmology to be reduced to first-order differential equations. The perfect-fluid approximation is not $O(d,d)$-invariant, implying that stringy fluids possess in general a non-vanishing viscosity. |
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